Journal articles: 'PCBN'

1

Li, Yong, Zi Li Kou, Shen Zhuo Liu, Rui Zhang, Ping Ping Liu, Fang Ming Liu, Wen Wen Yin, Shuai Yin, and Jian Lai Zou. "Wear Behaviors of PCBN Tools in Interrupted Turning Hardened Steel with Tool^’s Chamfer Angle and Edge Preparation Considered." Applied Mechanics and Materials 665 (October 2014): 3–10. http://dx.doi.org/10.4028/www.scientific.net/amm.665.3.

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The performance and wear mechanisms of one type of polycrystalline cubic boron nitride (PCBN) cutting tool with two different cutting edge micro geometries (marked as PCBN 169T and PCBN 169S) have been investigated in this paper. Interrupted turning of round GCr15 steel has been selected as the test method. The experimental results indicate that PCBN 169S has a greater thermal wear resistance than PCBN 169T at high cutting speeds. It is believed that edge preparation can shorten or eliminate the initiative wearing stage, improve the impact resistance, reduce the occurrence of chipping or dilapidation, and extend tool life. Scanning electron microscopy (SEM) were used to evaluate wear mechanisms of PCBN tools. Our results show that the dominant wear mechanisms for PCBN 169T and PCBN 169S are mechanical and chemical wear.

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2

Lv, Zhi, Ji Fu Feng, Feng Lin, and Xi Peng Xu. "Effects of Additives and CBN Grit Size on the Machinability of PCBN Tools." Materials Science Forum 532-533 (December 2006): 41–44. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.41.

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An investigation was reported on how to improve the machinability of PCBN tool for realizing the electric spark line cutting of PCBN tool. The machinability of the PCBN tool was evaluated in terms of its current conductivity. The influences of the additive compositions, additive concentrations and grit sizes of CBN on the current conductivity of PCBN tool were discussed through manufacturing PCBN tool. Experimental results indicated that the machinability of PCBN tool was attributed to the mesh structure of current-conducting additive, which was the combined effects of high additive concentrations and fine CBN grits.

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3

Ding, Yun Peng, Ming Xuan Zhang, Qun Luo, Chen Jiang Dong, Jiao Jiao Yao, Yan Wang, Ka Gao, and Rui Zhang. "Influence of Technological Conditions on the Properties of PcBN Composites Fabricated by Spark Plasma Sintering." Solid State Phenomena 281 (August 2018): 420–25. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.420.

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Polycrystalline cubic boron nitride (PcBN) composites were fabricated by spark plasma sintering (SPS). The SiC, Si3N4 and Si/B were used as binder. The effects of SPS sintering process parameters, such as the sintering temperature, holding time, heating rate and binder composition, on the properties of PcBN samples were investigated. PcBN composite with a hardness of 23.12GPa was fabricated efficiently by SPS. The hardness of PcBN sample increased first and then decreased with the increase of sintering temperature. As the holding time was 20 min, the hardness of PcBN sample was the highest. The PcBN performance at the heating rate of 50 °C/min was significantly better than that of 100°C /min. When the binder component of SiC, Si3N4, and Si was 63%:27%:10%, the hardness of PcBN was the highest. With an addition of Si, the PcBN samples had higher hardness than that of B.

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4

Okamura, Katsumi, Saturo Kukino, and Tomohiro Fukaya. "New Pcbn for Heavy Interrupted Cutting of Hardened Steel." Materials Science Forum 534-536 (January 2007): 1117–20. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.1117.

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PCBN tools are used worldwide for machining of hardened steel parts in automotive industries. Because cutting by PCBN tools has many advantages, which are high-precision, highefficiency, high-flexibility and low total machining cost, compared with conventional grinding methods. But in heavy interrupted cutting of hardened steel, the tool life is not so stable by sudden breakage of the cutting edge, and total cost of cutting by PCBN is not so economical compared to the grinding. So the conventional grinding is still main process in such applications. Recently, demand for decreasing machining cost has grown in heavy interrupted cutting and much tougher PCBN material is required. To solve this problem, new PCBN has been developed. New PCBN has very fine and homogeneous microstructure to increase the toughness of sintered body that it provides a reliable tool life for heavy interrupted cutting. The features and cutting performances of new PCBN are described in this report.

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5

Xiao, Lu, M. X. Zeng, Dong Hui Wen, H. H. Wu, and B. H. Si. "PCBN Tool Wear Mechanism in Interrupted Hard Turning SAE8822 Hardened Steel." Key Engineering Materials 315-316 (July 2006): 329–33. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.329.

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The wear behaviour in the precision interrupted hard part turning SAE8822 case hardened steel by BN250 PCBN cutting tool was studied. Experimental results showed that the main wear mechanism for the PCBN tool was the edge chipping by the fluctuation of cutting forces and cutting temperature. The oxidization and diffusion of the elements between workpiece and PCBN tool decrease the bonded strength between binder and cBN crystal, then lead to the damage of PCBN cutting tool.

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6

Liu, Rui Ping, Fu Ming Deng, and Xue Jun Lu. "Wear Mechanisms of PCBN Cutting Tools in Hard and Dry Cutting GCr15 Bearing Steel." Advanced Materials Research 197-198 (February 2011): 1494–99. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.1494.

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GCr15 bearing steel was turned with PCBN cutting tools in a manner of hard and dry cutting, and the characteristics and morphology of rake and flank face of PCBN cutting tools were observed, the element distribution of different regions of rake and flank face of PCBN cutting tools were tested and analyzed by use of EDS, and finally the wear mechanisms of PCBN cutting tools were discussed. The results showed that the wear areas of rake and flank face of PCBN cutting tools were small and mostly concentrated near the tip and sub-chamfering, and the reason was mechanical, oxidation, chemical and phase transition wear, which resulted in the joint action of tool wear.

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7

Ji, Wei, Xian Li Liu, Fu Gang Yan, Sheng Lei Xiao, and Meng Chao Fan. "Investigations of Surface Roughness with Cutting Speed and Cooling in the Wear Process during Turing GH4133 with PCBN Tool." Key Engineering Materials 589-590 (October 2013): 258–63. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.258.

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The high temperature strength of Ni-based superalloys coupled with excellent corrosion resistance make them ideal for aerospace applications. However, the difficulty in finish machining superalloys with the carbide tools presents the short tool-life. Polycrystalline Cubic Boron Nitride (PCBN) is potential to machine superalloys. To data, there are many researches about PCBN tool wear, but only little papers showing how the surface roughness and the wear speed are influenced by cutting parameter and the coolant during the differences periods of PCBN tool wear. This investigation has been conducted to show that the PCBN tool wear is slower with cooling that without cooling during cutting superalloys with PCBN tool especially in VB up to a certain value. It is shown that tool fracture can be reduced by using the cooling. In the process of PCBN tool wear, in addition, there are some differences of the effect of the cooling for roughness Ra values.

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8

Gao, Haining, Xianli Liu, and Zhitao Chen. "Cutting Performance and Wear/Damage Characteristics of PCBN Tool in Hard Milling." Applied Sciences 9, no. 4 (February 22, 2019): 772. http://dx.doi.org/10.3390/app9040772.

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In the intermittent machining of hardened steel for the die and mold industry, determining how to reduce the wear of PCBN (Polycrystalline Cubic Boron Nitride) tools and improve their machining efficiency and quality is an important subject. This study investigated the intermittent machining of hardened steel (Cr12MoV, 59HRC (Rockwell hardness)) using uncoated PCBN tools to determine the cutting performance (cutting force, chip morphology, surface quality, tool life, cutting temperature) and the wear/damage characteristics of the tools. The results showed that the cutting performance of a PCBN tool was better than that of a cemented carbide tool. The wear mechanism on the PCBN tool flank was diffusion wear, adhesive wear, and oxidation wear. The main failure modes of the PCBN tool in the machining process of hardened steel at low speed were tool micro-chipping, the conchoidal damage of the rake face, and the larger damaged area of the flank face. The main failure modes of the PCBN tool in the machining process of hardened steel at high speed were flank wear and high-rate fatigue damage.

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9

Zhang, B., Wen Feng Ding, Jiu Hua Xu, Q. Pan, and Y. J. Shi. "Self-Sharpening Abrasive Composite Bulks with PCBN Grains." Key Engineering Materials 487 (July 2011): 220–24. http://dx.doi.org/10.4028/www.scientific.net/kem.487.220.

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Abrasive composite bulks consisting of polycrystalline cubic boron nitride (PCBN) grains, Cu-Sn-Ti alloy and graphite particles were sintered at the heating temperature of 920 °C for the dwell time of 30 min. The bending strength of abrasive composite bulks was measured. The interfacial microstructure and the phases were characterized. In addition, the dressing experiment was carried out to detect the self-sharpening behavior of the composite bulks. Results obtained show that the abrasive composite bulks in this investigation give higher bending strength than that of the vitrified abrasive wheels. The compounds of TiN, TiB2were formed and the PCBN grains were embedded firmly. Strong fixing of the bulks to the PCBN grains led to the breakage of the PCBN grains when the abrasive composite bulks fractured. The intergranular fracture mode of the PCBN grains ensured the self-sharpening effect of the grains.

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10

Harano, Katsuko, Keiko Arimoto, Yuh Ishida, and Hitoshi Sumiya. "Cutting Performance of Binder-Less Nano-Polycrystalline cBN Tool." Advanced Materials Research 1017 (September 2014): 389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.1017.389.

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Binder-less nanopolycrystalline cBN (BL-PcBN) synthesized by direct conversion under high pressure and high temperature has a fine texture consisting of small cBN grains (<100nm), high hardness (40–50 GPa) and high transverse rupture strength (1.3–1.6 GPa). Their mechanical properties strongly depend on their starting materials and synthetic conditions. In this study, Ball-end mill tools prepared from several kinds of BL-PcBN synthesized under various conditions (8–20 GPa, 1500–2300oC) were examined for precision cutting of high-strength hardened steel comparing with conventional sintered cBN. A fine mirror-finish surface with Ra of 20 nm could be produced by precision BL-PcBN tools, while not by conventional sintered cBN tools. The tool wear of BL-PcBN synthesized from hBN at 10 GPa and 2200°C was four to five times less than that of conventional cBN. These results revealed that the BL-PcBN tools have excellent potential for precision cutting on ferrous materials.

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11

Carolan, Declan, Alojz Ivanković, and Neal Murphy. "Numerical Investigation into Dynamic Fracture of PCBN." Key Engineering Materials 488-489 (September 2011): 553–56. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.553.

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Polycrystalline Cubic Boron Nitride (PCBN) is a super-hard material, which is used in some of the most demanding material removal operations today. PCBN cutting tools are employed in turning of hardened steels as well as machining of other abrasive and aerospace grade alloys. In these applications the tools are subjected to high operating temperatures, abrasive and impact loading. Impact loading can lead to the sudden fracture and hence failure of the tool. Much of the recent developments in this industry have been focused on improving the fracture toughness of the PCBN compact. In this work a hypothesis based on induced thermal stresses at the crack tip has been put forward to explain the observed rate sensitivity of PCBN. The results show that the fracture toughness of PCBN is closely linked to the CBN grain size and that the rate sensitivity can be explained in part by induced thermal stresses at the crack tip at high rates of loading.

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12

Jia, Yun Hai. "Study on EDM Technics of Polycrystalline Cubic Boron Nitride Cutting Tool and PcBN Cutting Tool’s Life." Applied Mechanics and Materials 120 (October 2011): 311–15. http://dx.doi.org/10.4028/www.scientific.net/amm.120.311.

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The samples of Polycrystalline cubic boron nitride (PcBN) cutting tool were machined by adjusting the main parameters of electrical discharge machining (EDM). After the machining, the phases were analyzed by X-ray diffraction analyzer and the surface layer microstructure was observed by scanning electronic microscope. The fundamental component of machined PcBN cutting tool affected layer was obtained and the reason of begetting affected layer was analyzed. The relationship curves between pulse width, working electric current and thickness of affected layer, blade surface roughness were summarized. The relationship between PcBN cutting tool’s life that was machined by EDM and cutting tool flank width, workpiece surface roughness were analyzed. The results showed that to adjust electrical discharge machining parameters, such as decreasing pulse width or machining electric currents, can reduce the thickness of affect layer, improve blade surface roughness and extend the service life of PcBN cutting tool. These researches provide valuable test reference for drawing up electrical discharge machining technics of PcBN cutting tool and forecasting cutting tool’s life.

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13

Qing, Zhen Hua, Dun Wen Zuo, Feng Xie, and Chong Gao Zhang. "Trail Investigation on Chip of High-Speed and Dry Cutting on Hardened Steel with PCBN Tool." Advanced Materials Research 142 (October 2010): 26–30. http://dx.doi.org/10.4028/www.scientific.net/amr.142.26.

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The high-speed hard and dry cutting chips of hardened alloy-steel with PCBN tool is presented in this paper: After the work piece temperature measured by ThermaVision infrared thermometer, it is proved that the heat generated by cutting is carried out by chips; After SEM analyzed chip it is proved that the cutting temperature is increased and then fallen and the PCBN tool suitable for high-speed hard and dry cutting. It is suitable for PCBN tool cutting hardened alloy-steel 42CrMo instead of grinding.

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14

Carolan, Declan, M. Petrović, Alojz Ivanković, and Neal Murphy. "Fracture Properties of PCBN as a Function of Loading Rate." Key Engineering Materials 417-418 (October 2009): 669–72. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.669.

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Polycrystalline Cubic Boron Nitride (PCBN) is a superhard material which is used in machining of hardened steels and other abrasive and aerospace grade alloys. In these applications the tools are subjected to high operating temperatures, abrasive and impact loading. Impact loading can lead to the sudden fracture and hence failure of the tool. In this work the static and dynamic fracture toughness of PCBN is determined via a combined experimental-numerical approach. The results show that the fracture toughness of PCBN varies with loading rate.

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15

Zhou, Yu Hai. "The Application and Performance of Diamond and PCBN Tools in Difficult-to-Cut Materials." Solid State Phenomena 263 (September 2017): 90–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.263.90.

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Diamondand PCBN are extra-hard materials. There are several grades in the PCD andPCBN groups. Comprehensive Review of Super hard materials such as diamond cutting tools, high-speed machining PCBN tool and performance, the type of domestic and international manufacturing and research status . Elaborate on three high-speed machining with a diamond cutter nature and characteristics of the domestic and foreign manufacturing enterprise status, as well as polycrystalline cubic boron nitride tool features and applications. The isotropic synthetic graphite high-speed processing of diamond tool applications, engine block, cylinder heads high-speed milling PCBN cutting tool applications, aerospace application example to illustrate the advantages of hard material tool in high-speed machining of titanium alloys in high speed turning PCBN tools. Hard material tool to provide guidance and support for the selection of high-speed processing manufacturing enterprises.

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16

Zhang, Jing Ying, Qi Xun Yu, Si Qin Pang, Shu Suo Meng, Tian Shun Wang, and Jin Tao Hu. "Development & Application of Polycrystal Cubic Boron Nitride Cutting Tool Material." Key Engineering Materials 375-376 (March 2008): 168–71. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.168.

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This article illustrates the production method and mechanical & physical properties of polycrystal cubic boron nitride (PCBN) cutting tool material. As shown by the turning machining of hardened steel, cold-hardened cast iron and composite materials, PCBN cutting tool is superior in cutting performance to cemented carbide and ceramics cutting tools. In recent years, with great improvement in production process and overall mechanical properties of PCBN cutting tool material, it can effectively make rough machining of ferrous metal. This article contributes to the popularization and application of this cutting tool.

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17

Liu, Xian Li, X. H. Zhao, Yi Zhi Liu, Yi Wen Wang, and S. H. Jiang. "Multimedia Cutting Database of PCBN Tools." Applied Mechanics and Materials 10-12 (December 2007): 336–40. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.336.

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In order to realize general management of PCBN tool multimedia information, this paper set up multimedia cutting database of PCBN tool on the platform of Visual Basic, mainly applied database interface technology of Visual Basic and database management system of Microsoft SQL Server 2000. Aimed at the characteristic of large video data, handling relative path was brought forward as a method. Practice proved that handling relative path could realize all functions the database needed, and increase system running speed, general management of PCBN tool information under different machining conditions was realized.

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18

Miao, Qing, Wen Feng Ding, Jiu Hua Xu, Zhen Zhen Chen, and Jian He. "Reconstruction and Analysis of Wear Topography of PcBN Abrasive Grain." Key Engineering Materials 546 (March 2013): 30–34. http://dx.doi.org/10.4028/www.scientific.net/kem.546.30.

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This paper mainly deals with the reconstruction and fractal analysis of wear topography of brazed polycrystalline cubic boron nitride (PcBN) grain in grinding process. On the basis of fractal analysis, the uncertainty in shape and complexity in wear mechanism are analyzed by means of the construction of micro fracture of PcBN grain after producing the brazed abrasive tool with PcBN grains and carrying out grinding test. The main results are summarized as follows: (1) Actual behavior of self-sharpening phenomenon due to micro fracture in the grinding process can be grasped and reconstructed using SEM and 3D video microscope. The reconstruction model can clearly express the complicated wear features and characteristics of the grain. (2) The fractal dimension can relate the performance of PcBN grain to its micro fracture, and then the self-sharpening phenomenon due to micro fracture can be evaluated quantitatively on the basis of fractal analysis.

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19

Yang, Hai Dong, Zhen Hua Qing, Feng Xie, and Chong Gao Zhang. "Experiments on High-Speed and Dry Cutting with PCBN Tool." Key Engineering Materials 431-432 (March 2010): 114–17. http://dx.doi.org/10.4028/www.scientific.net/kem.431-432.114.

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This paper deals with the High-speed Hard and Dry Cutting mechanism of hardened alloy-steel with PCBN tool: the cutting speed and workpieces temperature and tool wear are being discussed in different cutting speeds when cutting alloy-steel 42CrMo. After the workpiece temperature measured by ThermaVision, it is proved that the workpiece temperature was not high and changed little. Through the SEM and EDS analyses for chip and tool wear, it is proved that PCBN tool is suitable for High-speed Hard and Dry Cutting. It is suitable for PCBN tool to cut hardened alloy-steel 42CrMo instead of grinding.

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20

Shao, Fang, Yu Ting Wang, Li Jing Zou, Xue Yan, and Yan Ying Wu. "Diffusion and Oxidation Wear of PCBN Tool when Cutting Six Workpiece Materials Based on Thermodynamics." Key Engineering Materials 589-590 (October 2013): 128–33. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.128.

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Cutting temperature always highly reaches over to 1000°C ? when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature; the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpiece materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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21

Shao, Fang, Yu Ting Wang, Li Jing Zou, Yan Ying Wu, and Chuan He. "Diffusion and Oxidation Wear of Superhard Cutting Tool Based on Thermodynamics Solubility." Applied Mechanics and Materials 536-537 (April 2014): 1417–20. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1417.

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Cutting temperature always highly reaches over to 1000°C? when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpiece materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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22

Shao, Fang, Yu Ting Wang, Li Jing Zou, Yan Ying Wu, and Dong Sun. "Diffusion and Oxidation Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics." Applied Mechanics and Materials 538 (April 2014): 54–57. http://dx.doi.org/10.4028/www.scientific.net/amm.538.54.

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Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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23

Shao, Fang, Yu Ting Wang, Li Jing Zou, Yan Ying Wu, and Chuan He. "Diffusion and Oxidation Wear of Superhard Cutting Tool Based on Thermodynamics Enthalpy." Advanced Materials Research 941-944 (June 2014): 2389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2389.

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Cutting temperature always highly reaches over to 1000°C? when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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24

Shao, Fang, Yuting Wang, Yingqun Xiao, Lihua Xiao, and Kesheng Zhang. "PCBN Tool Wear for Hard Materials Based on Thermodynamics Principals." Open Mechanical Engineering Journal 9, no. 1 (November 11, 2015): 1103–8. http://dx.doi.org/10.2174/1874155x01509011103.

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The temperature rise exceeds over 1000°C in cutting process while working with PCBN tools high speed machining. This intense temperature results in wearing of tools and thus diffusion and oxidation are mainly responsible for wearing. This paper proposes the oxidation and diffusion wearing for PCBN cutting tools and analysis has been carried out considering thermodynamics principles. The next step is to find out dissoluation concentration of PCBN tool materials. The temperature range is different for these materials. The Gibbs free energy criterion is utilized for analysis purposes and validates the formed diffusion reaction rules in extreme temperature scenario. The PCBN tools were used for carrying out machining tests at different speeds 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut was 0.1, 0.8, 1, and 1.5 mm respectively on controlled lathe machine PUMA300LM. It was revealed that experimentals results matches with theoratical data. These findings will be utilized for future reference for tools designing and material selection.

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25

Ren, Zhen Huo, Rui Zhang, Hai Long Wang, De Liang Chen, and Ming Liang Li. "Preparation and Characterization of Polycrystalline Cubic Boron Nitride (PcBN) Compacts by a Pressureless Sintering Process." Advanced Materials Research 105-106 (April 2010): 38–41. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.38.

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A novel cost-effective pressureless sintering method has been developed to prepare polycrystalline cubic boron nitride (PcBN) compacts. The effect of feldspar as sintering aids was analyzed in this paper. Various amounts of feldspar from 5 to 15 wt% were added to cBN powders, and the pressureless sintering was conducted at temperatures ranging from 900°C to 1200°C under an air atmosphere. The microstructure, phase, density and microhardness of the as-obtained PcBN compacts were measured and correlated to amounts of Si added and to sintering temperatures. The sample showed superior sintering behavior in comparison to those fabricated using hot pressed sintering. The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that feldspar diffused homogeneously and tightly bonded with cBN. But hBN appeared when the sintering temperature even at 900°C, which dramatically affected the property of PcBN compacts. A PcBN compact with a relative density of 91% was obtained at 1100°C and its microhardness was as high as 1000HV.

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26

Shao, Fang, Yu Ting Wang, and Jiang Hong Li. "Diffusion Wear and Oxidation Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics Solubility." Materials Science Forum 836-837 (January 2016): 242–49. http://dx.doi.org/10.4028/www.scientific.net/msf.836-837.242.

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Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature., the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2mm and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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27

Shao, Fang, Yu Ting Wang, Ying Qun Xiao, Li Hua Xiao, Ke Sheng Zhang, and Qun Cai. "Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics Solubility." Key Engineering Materials 693 (May 2016): 1207–15. http://dx.doi.org/10.4028/www.scientific.net/kem.693.1207.

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Cutting temperature always highly reaches over to 1000¡æ when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature., the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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28

Shao, Fang, Yu Ting Wang, Li Jing Zou, Yan Ying Wu, and He Chuan. "Diffusion Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics." Applied Mechanics and Materials 494-495 (February 2014): 525–28. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.525.

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Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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Shao, Fang, Yu Ting Wang, Li Jing Zou, Yan Ying Wu, and Dong Sun. "Diffusion and Oxidation Wear of Superhard Cutting Tool Based on Thermodynamics." Applied Mechanics and Materials 556-562 (May 2014): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.511.

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Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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Pacella, Manuela, Sina Saremi-Yarahmadi, and Luciano Lamberti. "Ultrasonic Deposition of Carbon Nanotubes on Polycrystalline Cubic Boron Nitride Composites." Materials 14, no. 3 (January 21, 2021): 516. http://dx.doi.org/10.3390/ma14030516.

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Polycrystalline cubic boron nitride (PcBN) are super-hard materials with high hardness and excellent abrasive resistance, widely used in cutting tools for precision machining of automotive and aerospace parts; however, their brittle properties make them prone to premature failure. Coatings are often applied to PcBN to extend their range of applicability and durability. Conventional coating methods are limited to the thickness range of a few hundred nanometres, poor adhesion to the substrate, and limited stability under ambient conditions. To further the properties of PcBN composites, in this paper, we explore the use of ultrasonic bonding to apply thick coatings (30–80 μm) on PcBN cutting tools. For the first time, a multi-walled carbon nanotube (MWCNT) powder is preplaced on a PcBN substrate to allow an unconventional coating technique to take place. The effects of ultrasonic bonding parameters on the change of mechanical properties of the coated tools are investigated through scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), micro-hardness analyses, and white light interferometry. The structure of the carbon nanotubes is investigated through transmission electron microscopy (pre coating) and cross-section of the bonded MWCNTs is studied via focused ion beam milling and SEM to evaluate the bonding between the multi-walled nanotubes. Optimum processing windows (i.e., bonding speed, energy, and pressure) are discovered for coating MWCNTs on PcBN. Focus ion beam milling analyses revealed a relationship between consolidation parameters and porosity of MW(pCNT) bonds. The proposed method paves the way for the novel design of functional coatings with attunable properties (i.e., thickness and hardness) and therefore improved productivity in the machining of aerospace and automotive parts.

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Zhai, Yuan Sheng, Shuai Qiao, Xian Li Liu, and Qiang Hu. "The Simulation Analysis and Experimental Research on the Process of PCBN Cutting Super-Alloy." Key Engineering Materials 589-590 (October 2013): 88–93. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.88.

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Ni-based super-alloy GH4169 that is most widely used in aerospace is one of the most difficult-to-cut materials, which can be machined by Polycrystalline Cubic Boron Nitride (PCBN) tool. In this paper, the cutting process of super-alloy GH4169 with PCBN tool is researched by simulation, combing with the comparison and verification of experiment. The change rules of cutting temperature and force under different cutting parameters are obtained in this study. The reasonable parameter ranges of high efficiency cutting are proposed in cutting parameter optimization, in order to provide a reference for high efficiency machining of super-alloy GH4169 with PCBN tool.

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Sato, Yutaka S., Masahiro Muraguchi, and Hiroyuki Kokawa. "Tool Wear and Reactions in 304 Stainless Steel during Friction Stir Welding." Materials Science Forum 675-677 (February 2011): 731–34. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.731.

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Four kinds of the welding tools made of PCBN, W, WC and Al2O3 were applied to FSW of 304 stainless steel, and then the wear and reaction between the tool debris and the steel matrix were examined for each tool material. Severe tool damage was found in W, WC and Al2O3 tools after FSW, while the PCBN tool was hardly worn. Formations of Cr-rich borides, ferrite phases containing the high W contents and Cr-rich carbides were found in the stir zones produced using PCBN, W and WC tools, respectively. It was suggested that formation of those phases could be expected by calculation using the thermochemical database.

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Sumiya, Hitoshi, and Katsuko Harano. "Wear Characteristics of Binder-Less Nano-Polycrystalline Diamond and Cubic Boron Nitride." Advanced Materials Research 1017 (September 2014): 406–10. http://dx.doi.org/10.4028/www.scientific.net/amr.1017.406.

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Wear characteristics of binder-less (single-phase) nanopolycrystalline diamond (NPD) and cubic boron nitride (BL-PcBN) were investigated by rubbing them against various ceramics such as SiO2, Si3N4, Al2O3 and SiC. The wear rates of NPD and BL-PcBN against SiO2 and Si3N4 at high speed rubbing (280-360 m/min) at a loading pressure of 55 MPa (starting condition) were considerably high, indicating the main wear process is a chemical reaction. BL-PcBN specimens were found to be worn at much higher (more than ten times) rates than NPD, suggesting that cBN highly reacts with these ceramics in comparison with diamond under the experiment condition.

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34

Ding, Zhi, and Hai Dong Yang. "Development and Application of PCBN Tools Used in High-Speed Milling 30CrMnSiA." Applied Mechanics and Materials 130-134 (October 2011): 3835–38. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3835.

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Aiming at the problems of coated carbide cutting tools used in Quenched 30crMnSiA steel milling such as poor cutting performance and shot service life.We have designed and produced a new type of PCBN tools as cutter head by welding. After high-speed milling and testing the Quenched 30CrMnsiA steel, we have optimized the process parameters and improved production efficiency. The experiment proved that the new type of PCBN tools can replace the carbide coated tools completely, It not only increases the tool life, but also reduces the tool costs, and fully demonstrated that the PCBN tools also have good application prospect in high-speed milling.

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Mabuchi, Yusuke, Fumihiro Itoigawa, Takashi Nakamura, Keiich Kawata, and Tetsuro Suganuma. "High Precision Turning of Hardened Steel by Use of PcBN Insert Sharpened with Short Pulse Laser." Key Engineering Materials 656-657 (July 2015): 277–82. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.277.

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Precision grinding is one of the important processes for finishing of hardened steel parts. However, the grinding process might be quite costly providing the parts with shape complexity should be finished because a number of production steps are needed. Also, this process has some environmental issues, such as disposal of a large amount of grinding sludge and grinding fluid. Precision cutting would become a better alternative process to reduce cost and environmental burden because process steps can be simplified by use of CNC machine tools with PcBN cutting insert if deterioration of cutting tool edge by wear and chipping can be suppressed for long duration. In this study, to improve performance of a PcBN cutting insert, such as wear resistance and defect resistance by the applying of pulse laser processing to sharpen cutting edge in order to realize substitution of cutting for grinding. Precision cutting experiments for hardened steel are conducted by use of the PcBN insert with sharp and tough edges processed by pulsed laser and, for comparison, by use of the PcBN insert ground with diamond wheel. From the results of cutting experiments, it was found that precision cutting with PcBN insert processed by pulsed laser can provide a steady cutting state for a long cutting duration, and a smooth finished surface comparable to precision grindings.

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Suzuki, Daisuke, Fumihiro Itoigawa, Keiichi Kawata, and Takashi Nakamura. "Using Pulse Laser Processing to Shape Cutting Edge of PcBN Tool for High-Precision Turning of Hardened Steel." International Journal of Automation Technology 7, no. 3 (May 5, 2013): 337–44. http://dx.doi.org/10.20965/ijat.2013.p0337.

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Polycrystalline Cubic Boron Nitride (PcBN) cutting tools have excellent characteristics, such as a high degree of hardness and low chemical reactivity, so they have the potential to replace the high precision grinding of hardened steel with high precision cutting. However, there are some problems inherent in so-called sintered materials, including low formability and unsteady wear. In order to solve these problems, pulsed laser processing is applied to shape a cutting edge. In this study, first PcBN cutting tools processed by lasers are adopted to the high-precision turning of hardened steel with 58HRC. As the result, these PcBN cutting tools provide a steady cutting state and a smoother finished surface. Second, in order to investigate these advantages of PcBN cutting tools processed by laser, individual requirements of the cutting tool are investigated: edge sharpness, surface quality including micro-defects, surface hardness, and friction coefficient. The results indicate that tools processed by laser have sharper edges and smoother, harder, and lowerfiction surfaces, compared to ground tools. Above all, the increase in surface hardness improves cutting performance because of it provides higher wear resistance.

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Ma, Yao, Jian Li, Hai Long Wang, and Rui Zhang. "High Pressure and High Temperature Sintered PcBN Using Al, B₄C and C as Sintering Additive." Key Engineering Materials 697 (July 2016): 521–25. http://dx.doi.org/10.4028/www.scientific.net/kem.697.521.

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Polycrystalline cubic boron nitride (PcBN) composites were sintered by high pressure and high temperature sintering (HPHT) at 1450 °C for 3 min under a pressure of 5.0 GPa. Aluminium,boron carbide and carbon in the starting mixture reacts with cubic boron nitride (cBN) to form Al3BC3 and AlN bonding among cBN grains during sintering. X-ray diffraction (XRD) and Scanning electron microscope (SEM) were used to analyze phases and micro-structure of the sintered samples. The dense structure of super hard cBN grains bonded together with Al3BC3 and AlN offers superior hardness and high strength. The Vickers hardness of PcBN composites was 45±5 GPa, and the strength of PcBN composites was 345±15 MPa.

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Li, Jiu Sheng, Li Feng Hao, Xiao Hong Xu, Li Zhang, and Tian Hui Ren. "Preparation, Characterization and Tribological Evaluation of Calcium Borate Nanoparticles as Lubricant Additives." Advanced Materials Research 148-149 (October 2010): 1047–56. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1047.

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To develop a potential substitute for conventional lubricant additive, pure calcium borate nanoparticles (PCBN) and calcium borate nanoparticles modified with oleic acid (MCBN) were prepared. The microstructures of the as-obtained samples were characterized using X-ray power diffraction (XRD), transmission electron microscope (TEM) and infrared spectra (IR), and the dispersing stability of oil containing nanoparticles was also evaluated. Tribological properties of MCBN used as lubricating additive were evaluated using four-ball tribometer and compared with that of PCBN. The results indicate that MCBN show better antiwear and friction-reducing property than PCBN. The worn surface of the steel ball lubricated with MCBN was investigated by Polarized microscope (PM) and X-ray photoelectron spectroscopy (XPS), and the action mechanism of MCBN during friction process was preliminarily discussed.

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Cheng, Mohd Zulhasyree Mohd Zulkifli, and Yusri Yusof. "Performance of Turning Steels by Using Polycrystalline Cubic Boron Nitride Cutting Tool." Applied Mechanics and Materials 315 (April 2013): 146–50. http://dx.doi.org/10.4028/www.scientific.net/amm.315.146.

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PCBN cutting tool is widely used in turning process and known as second best cutting tool after Diamond. This study investigates the suitability of PCBN cutting tool to cut variety types of steel. Experimental results for three major parameters which are cutting speed 150, 175 and 200 m/min, depth of cut 0.1, 0.2 and 0.3 mm, and feed 0.1, 0.2, and 0.3 mm/rev were converted into surface roughness analysis to look on the performance of PCBN to cut three different types of steels. The selected work materials of carbon steel AISI 1040, alloy steel AISI 4140 and tool steed AISI D2 were machined in dry tuning process with constant cutting length 50 mm and initial workpiece diameter 40 mm. At the end of this study, it is shown that higher cutting speed produced better surface roughness for AISI 1040 and AISI D2 but worsen the surface of AISI 4140. Low feed value is the most practical parameter to be used to produce fine surface finish using PCBN cutting tool. Fluctuate roughness value produced by increasing depth of cut use in turning parameters and no specific relationship can be concluded between depth of cut and surface roughness value.

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40

Horváth, Richárd, and Szabolcs Bíró. "Edzett acélok esztergálása pcbn szerszámokkal." Fiatal Műszakiak Tudományos Ülésszaka 1. (2007) (2007): 89–92. http://dx.doi.org/10.36243/fmtu-2007.23.

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41

HARADA, Takashi, Katsumi OKAMURA, and Satoru KUKINO. "PCBN and Diamond Cutting Tools." Journal of the Japan Society for Precision Engineering 86, no. 11 (November 5, 2020): 844–47. http://dx.doi.org/10.2493/jjspe.86.844.

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42

Denkena, B., J. Köhler, and C. E. H. Ventura. "Grinding of PCBN cutting inserts." International Journal of Refractory Metals and Hard Materials 42 (January 2014): 91–96. http://dx.doi.org/10.1016/j.ijrmhm.2013.08.007.

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Liu, Ji Bao, Zheng Fang Shi, Xiao Jing Li, and Di Wang. "Development and Application of Super-Hard Cutter Material." Key Engineering Materials 480-481 (June 2011): 676–80. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.676.

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The CIMS development and the high-speed cutting has given a higher demands on cutter performance. It is an tremendous tendency of studying excellent wearing resistance and high stability. PCD (polycrystalline diamond) and PCBN (poly cubic boron nitride) can obtain more higher finished surface quality, which cannot acquire by regular cutting process. This study introduces super-hard cutters materials (PCD and PCBN) development, and discusses two kinds of material properties, The features of them used in different cutting fields are given.

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44

Díaz-Álvarez, José, Víctor Criado, Henar Miguélez, and José Cantero. "PCBN Performance in High Speed Finishing Turning of Inconel 718." Metals 8, no. 8 (July 26, 2018): 582. http://dx.doi.org/10.3390/met8080582.

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Inconel 718 is a Ni superalloy widely used in high responsibility components requiring excellent mechanical properties at high temperature and elevated corrosion resistance. Inconel 718 is a difficult to cut material due to the elevated temperature generated during cutting, its low thermal conductivity, and the strong abrasive tool wear during cutting process. Finishing operations should ensure surface integrity of the component commonly requiring the use of hard metal tools with sharp tool edges and moderate cutting speeds. Polycrystalline cubic boron nitride (PCBN) tools recently developed an enhanced toughness suitable for these final operations. This paper focuses on the study of PCBN tools performance in finishing turning of Inconel 718. Several inserts representative of different manufacturers were tested and compared to a reference carbide tool. The evolution of tool wear, surface roughness, and cutting forces was analyzed and discussed. PCBN tools demonstrated their suitability for finishing operations, presenting reasonable removal rates and surface quality.

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Aouad, Razika, and Idriss Amara. "Influence of the cutting condition on the wear and the surface roughness in the steel AISI 4140 with mixed ceramic and diamond tool." Journal of Engineering, Design and Technology 16, no. 6 (December 4, 2018): 828–36. http://dx.doi.org/10.1108/jedt-05-2018-0086.

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PurposeThe purpose of this paper is to study the influence of the cutting conditions (cutting speed, feed rate and cutting depth) on the roughness (Ra) and on the flank wear (Vb) of the steel AISI 4140.Design/methodology/approachMixed ceramic (CC650) and polycrystalline cubic boron nitride (PCBN) have been used to carry out straight turning tests under dry conditions.FindingsThe results indicate that PCBN is more efficient than mixed ceramic (Al2O3+TiC) used in terms of wear resistance regardless of the aggressiveness of the AISI 4140 at 50 hardness rockwell (HRC). Consequently, it is the most powerful. Surface quality attained with PCBN tool considerably compares with that of grinding. Even when the tool wear VB reached 0.3 mm, the majority of the recorded Ra values did not exceed 1 m at the various speeds tested. The correlation of tool wear Vb and surface roughness Ra established allows obtaining experimental empirical data on the cutting tool wear from measured surface roughness for practical use in industry. The values of constants and the coefficient of determinationR2of this mathematical model will be calculated. Mathematical models expressing the relation between the elements of the cutting regime and technological parameters (tool life and roughness) are proposed.Originality/valueMany works have been already made in the similar manner, but this study of CC650 and PCBN wear is the first. Through this study, we propose a mathematical model expressing the relation between the elements of the cutting regime, tool life and roughness.

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Wang, Guangyue, Xianliang Zhou, Xuefeng Wu, and Jing Ma. "Failure and Control of PCBN Tools in the Process of Milling Hardened Steel." Metals 9, no. 8 (August 14, 2019): 885. http://dx.doi.org/10.3390/met9080885.

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The polycrystalline cubic boron nitride (PCBN) milling tool can be used in the mold industry to replace cemented carbide tools to improve machining efficiency and quality. It is necessary to study the tool wear and failure mechanism to increase machining efficiency and extend tool life. Cr12MoV is used to analyze the failure form of PCBN tools in the interrupted cutting of hardened steels at low and high speed conditions in milling experiments. Experimental results show that the failure forms of PCBN tools include chipping and flank wear at low speed, and the failure modes at high speed are flank wear, the surface spalling of the rake face, and the fatigue failure on the flank face. The failure mechanism of different failure forms is analyzed by observing the surface morphology of the tool and using the theory of fracture mechanics. The results show that a high cutting speed should be selected to avoid the early damage of low speed and achieve better application of PCBN tools. At high cutting speed, tool failure is mainly caused by mechanical wear, diffusion wear, and oxidation wear. Moreover, a fatigue crack will occur at the cutting edge on the chamfered tool under thermal–mechanical coupling because of the intergranular fracture of the CBN grain and binder. A large area of accumulated fatigue damage may appear due to the influence of alternating mechanical stress and thermal stress. Finally, the control method to avoid tool failure is presented.

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Kuruc, Marcel, and Jozef Peterka. "Rotary Ultrasonic Machining of Poly-Crystalline Cubic Boron Nitride." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 22, no. 341 (December 1, 2014): 103–8. http://dx.doi.org/10.2478/rput-2014-0015.

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Abstract Poly-crystalline cubic boron nitride (PCBN) is one of the hardest material. Generally, so hard materials could not be machined by conventional machining methods. Therefore, for this purpose, advanced machining methods have been designed. Rotary ultrasonic machining (RUM) is included among them. RUM is based on abrasive removing mechanism of ultrasonic vibrating diamond particles, which are bonded on active part of rotating tool. It is suitable especially for machining hard and brittle materials (such as glass and ceramics). This contribution investigates this advanced machining method during machining of PCBN.

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Halpin, T., G. Byrne, J. Barry, and E. Ahearne. "The performance of polycrystalline cubic boron nitride tools in continuous, semi-interrupted, and interrupted hard machining." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 223, no. 8 (April 24, 2009): 947–53. http://dx.doi.org/10.1243/09544054jem1488.

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Polycrystalline cubic boron nitride (PCBN) cutting tools have enabled large-scale industrial hard machining owing to their high hot hardness and wear resistance. Experience clearly shows that tool requirements vary depending on the presence and severity of interrupts in the workpiece. The interrelationships between workpiece interruption parameters and tool wear and performance are assessed using a programme of continuous, semi-interrupted, and interrupted hard machining tests. A hypothesis for observed variations in wear behaviour between different PCBN grades and test conditions is developed on the basis of detailed tool wear scar analyses.

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Ding, Zhi, Jiang Han, and Hai Dong Yang. "Wear Mechanisms of Hard-Brittle Material Tools in High-Speed Machining of Powder Metallurgy Material." Key Engineering Materials 693 (May 2016): 1200–1206. http://dx.doi.org/10.4028/www.scientific.net/kem.693.1200.

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A series of experiments was conducted in high speed machining of powder metallurgy material with PCBN tools. The main tool wear mechanisms were discussed by observing tool wear morphology utilizing scanning electron microscopy (SEM) and detecting the element distribution of the worn tool surface using energy dispersive spectroscopy (EDS).The experimental results indicate that fragile breakage occurred before it reached its blunt standard in high-speed machining of powder metallurgy material with PCBN tools,and the tools wear mechanisms are synergistic interaction among mechanical wear,binder wear and chemical wear.

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Wang, Yu, Yuan Sheng Zhai, Fu Gang Yan, and Xian Li Liu. "Study of PCBN Cutting Tools Wear in High Speed Cutting Hardened Steel GCr15." Key Engineering Materials 431-432 (March 2010): 245–48. http://dx.doi.org/10.4028/www.scientific.net/kem.431-432.245.

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PCBN cutting tools is in high speed, high temperature and high pressure environment when high speed precision hard cutting hardened steel. Shear extrusion and slip effect in high speed cutting, cutting tools wear mechanisms are different from common cutting, even cutting tools wear mechanisms in high speed is in research stage at present. In this paper, coated PCBN cutting tools wear mechanisms in high speed cutting(v＝200~600m/min) GCr15 (HRC62-64) is studied, it is helpful to obtain cutting tools structure design, cutting parameters and improve cutting tools use efficiency.

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Journal articles on the topic 'PCBN'

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