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Relevant bibliographies by topics / Coated tungsten carbide

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Academic literature on the topic 'Coated tungsten carbide'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Coated tungsten carbide"

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KIDUNG TIRTAYASA, PUTRA PANGESTU, WAYAN DARMAWAN, DODI NANDIKA, IMAM WAHYUDI, LUMONGGA DUMASARI, and USUKI HIROSHI. "PERFORMANCE OF COATED TUNGSTEN CARBIDE IN MILLING COMPOSITE BOARDS." WOOD RESEARCH 66(4) 2021 66, no. 4 (September 9, 2021): 606–20. http://dx.doi.org/10.37763/wr.1336-4561/66.4.606620.

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The purpose of this research was to analyze the performance (wear resistance, surface roughness, chip formation, and noise level) of AlCrN, TiN, and TiAlN coated tungsten carbides in cutting composite boards. The composite boards of wood plastic composite, laminated veneer lumber, andorientedstrand board were cut by the coated tungsten carbide tools in a computer numerical control router. The results show that the differences in structure among the composite boards resulted in the difference in clearance wear, chip formation, surface roughness, and noise level phenomenon. The abrasive materials in wood plastic composite generated the highest clearance wear on the coated carbide tools tested. TiAlN coated carbide tool provided better wear resistance, smoother composite boards surfaces, and lower noise levels.

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SHIDA, Ryosuke, Masato OKADA, Hidehito WATANABE, and Masaaki OTSU. "Drilling of tungsten carbide using diamond coated carbide drill." Proceedings of The Manufacturing & Machine Tool Conference 2016.11 (2016): A35. http://dx.doi.org/10.1299/jsmemmt.2016.11.a35.

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Gou, Li, Ji Lei Zhu, Jun Guo Ran, and Suang Feng Yan. "Diamond Coated on Cobalt-Deficient Gradient Tungsten Carbide." Key Engineering Materials 280-283 (February 2007): 1889–92. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1889.

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In order to improve the adhesion between diamond coatings and cemented tungsten carbide (WC-Co) substrates, the diamond coatings were deposited on one kind of cobalt-deficient gradient WC-Co by the microwave plasma chemical vapor deposition (MPCVD). Scanning electron microscopy, X-ray diffraction and Raman spectroscopy were used to characterize the diamond coatings. The results showed dense, well facet diamond coatings. The cobalt content at the surface of substrate was measured by electron probe microanalysis. It was found that Co did not largely move to the surface as usual with deposition time increasing compared with the conventional tungsten carbide; The cobalt content at the surface of substrate after deposition (about 1 wt %) was lower than before (3.42wt%), which improved diamond coating’s adhesion against the tungsten carbide substrate.

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Suwa, Haruhiko, Soushi Sakamoto, Masafumi Nagata, Kazuhiro Tezuka, and Tetsuo Samukawa. "Applicability of Diamond-Coated Tools for Ball End Milling of Sintered Tungsten Carbide." International Journal of Automation Technology 14, no. 1 (January 5, 2020): 18–25. http://dx.doi.org/10.20965/ijat.2020.p0018.

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Sintered tungsten carbide which has high hardness and high heat resistance, has been widely used in molds and dies. Research on the development of a cutting technology for sintered tungsten carbide (sintered WC-Co alloy) has been pursued mainly with the use of a turning process. We focused on building an efficient milling method for sintered tungsten carbide by using diamond-coated ball end tools, and have investigated their basic properties under specific cutting conditions. This study extends our previous work by enhancing cutting distance in the milling of sintered tungsten carbide, especially that with a “fine” WC grain. The surface roughness of cut workpieces is evaluated from the point of view of the quality of surface roughness. A series of cutting experiments under different cutting conditions were carried out, and the possibility of deriving a suitable cutting condition for the ball end milling of sintered tungsten carbide is discussed.

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Chen, Tzung Ming, Yuan Ching Lin, and Jiun Nan Chen. "Analysis of Wear Behaviour of Sintering Carbide against DLC Coated and Nitriding Steel." Advanced Materials Research 579 (October 2012): 60–67. http://dx.doi.org/10.4028/www.scientific.net/amr.579.60.

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In this paper, tribological behaviours for sintering carbides and DLC/nitride film are discussed. During the wear test, two types of hardened steel are setting to sliding against eight series of carbide specimens in order to compare the wear mode and evaluate the wear performance of sintering carbides, which are made by different process parameters. The experiment result shows that a density ratio of sintering carbide between 86% and 99% does not have obviously different effect on wear resistance. Moreover, molybdenum binder with high diffusibility can improve the wear performance of tungsten carbide, but wear performance of titanium carbide is dependent on the amount of nickel/cobalt binder, separately. On the other hand, SAE52100 substrate absorbs the heat of friction and maintains the coated diamond-like carbon film in an excellent wear performance.

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Fábián, Enikő Réka, and Richard Horváth. "Adhesion Behavior of PVD-coated Cutting Tools." Acta Materialia Transylvanica 3, no. 2 (October 1, 2020): 61–64. http://dx.doi.org/10.33924/amt-2020-02-01.

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Abstract Cutting with TiAlN or CrAlN tip PVD-coated tungsten carbide-based inserts manufactured by powder metallurgy, we found no significant difference in the wear behavior of inserts regardless of whether the insert was used in wet or dry conditions. We determined the adhesion properties of the coating layers with a scratch test and by Daimler–Benz test. On the tungsten-based carbide cutting tool, the thinner TiAlN coating showed slightly better adhesion than the thicker CrAlN coating.

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Wood, R. J. K., D. W. Wheeler, D. C. Lejeau, and B. G. Mellor. "Sand erosion performance of CVD boron carbide coated tungsten carbide." Wear 233-235 (December 1999): 134–50. http://dx.doi.org/10.1016/s0043-1648(99)00230-6.

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SUZUKI, Reiji, Masato OKADA, Hidehito WATANABE, and Masaaki OTSU. "End milling of tungsten carbide using diamond coated carbide tool." Proceedings of The Manufacturing & Machine Tool Conference 2016.11 (2016): A36. http://dx.doi.org/10.1299/jsmemmt.2016.11.a36.

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OKADA, Masato, Ryosuke SHIDA, Hidehito WATANABE, Takuya MIURA, and Masaaki OTSU. "Drilling of cemented tungsten carbide using diamond-coated carbide drill." Proceedings of The Manufacturing & Machine Tool Conference 2018.12 (2018): B14. http://dx.doi.org/10.1299/jsmemmt.2018.12.b14.

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Wada, Tadahiro, and Hiroyuki Hanyu. "Tool Wear of Aluminum/Chromium/Tungsten-Based-Coated Cemented Carbide in Cutting Hardened Steel." Applied Mechanics and Materials 798 (October 2015): 377–83. http://dx.doi.org/10.4028/www.scientific.net/amm.798.377.

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An aluminum/chromium based coating film, called (Al,Cr)N coating film, has been developed. This coating film has a slightly more inferior critical scratch load and micro-hardness. Therefore, to improve both the scratch strength and micro-hardness of the (Al,Cr)N coating film, the cathode material of an alumi-num/chromium/tungsten target was used in adding the tungsten (W) to the cathode material of the alumi-num/chromium target. To clarify the effectiveness of the aluminum/chromium/tungsten-based coating film, we measured the thickness, micro-hardness and critical scratch strength of aluminum/chromium/tungsten-based coating film formed on the surface of a substrate of cemented carbide ISO K10 formed by the arc ion plating process. The hardened steel ASTM D2 was turned with the (Al,Cr,W)N, (Al,Cr,W)(C,N), (Al,Cr)N and the (Ti,Al)N coated cemented carbide tools. The tool wear of the coated cemented carbide tools was ex-perimentally investigated. The following results were obtained: (1) The micro-hardness of the (Al,Cr,W)N or (Al,Cr,W)(C,N), (Al,Cr)N coating film was 3110 HV0.25N or 3080 HV0.25N, respectively. (2) The critical scratch load of the (Al,Cr,W)(C,N) coating film was 123 N, which was much higher than that of the (Al,Cr)N or (Ti,Al)N coating film. (3) In cutting the hardened steel using (Al,Cr,W)(C,N) and (Ti,Al)N coated carbide tools, the wear progress of the (Al,Cr,W)(C,N) coated carbide tool was almost equivalent to that of the (Ti,Al)N coated carbide tool. The above results clarify that the aluminum/chromium/tungsten-based coating film, which is a new type of coating film, has both high hardness and good adhesive strength, and can be used as a coating film of WC-Co cemented carbide cutting tools.

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Dissertations / Theses on the topic "Coated tungsten carbide"

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Longpradit, Panchan. "Effect of substrate pretreatment on CVD diamond coated cemented tungsten carbide tools for wood cutting application." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326525.

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Pinheiro, Cleverson. "Avaliação da usinagem do inconel 718 via metodologia de Taguchi /." Guaratinguetá, 2018. http://hdl.handle.net/11449/154790.

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Orientador: Marcos Valério Ribeiro
Resumo: Apesar de ser amplamente utilizado em componentes aeroespaciais, o Inconel 718 apresenta algumas características que dificultam a sua usinagem: dureza elevada, resistência em altas temperaturas, forte afinidade para reagir com materiais de ferramentas e baixa condutividade térmica. Além do mais, esta liga possui tendência para a formação da aresta postiça de corte, endurecimento por deformação, assim como efeito abrasivo de carbonetos e fases intermetálicas, que resultam em tensões mecânicas e térmicas elevadas na aresta de corte. A qualidade de acabamento exigido pela indústria, para este material, é de 1,6 µm de rugosidade média (Ra) e 6 µm de rugosidade total (Rt). Sabendo da importância do Inconel 718, assim como da necessidade de conciliar os desafios de usinagem com a qualidade exigida, o objetivo deste trabalho foi encontrar a condição experimental que resulte em melhores resultados de usinagem. Para encontrar a condição ótima, a liga foi usinada utilizando duas ferramentas: experimental de cerâmica – Al2O3 + MgO (perfil S) e comercial de metal duro revestido (perfil C). Com a metodologia de Taguchi foram planejadas duas matrizes experimentais. Para a ferramenta cerâmica, a usinagem ocorreu a seco e nas seguintes condições: avanços de 0,10–0,20–0,30 mm/rev; velocidades de corte de 300–400–500 m/min; profundidades de usinagem de 0,20–0,35–0,50 mm. A ferramenta de metal duro revestido foi utilizada em profundidade fixa de 0,5 mm, nas seguintes condições experimentais: av... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Despite being widely used in aerospace components, the Inconel 718 presents some characteristics that make difficult its machining: high hardness, resistance at high temperatures, strong affinity to react with tools materials and low thermal conductivity. Moreover, this alloy has a tendency to form the built up edge, hardening by deformation, as well as the abrasive effect of carbides and intermetallic phases, which result in high mechanical and thermal tensions in the cutting edge. The surface finishing quality required by the industry, for this material, is 1.6 μm of average roughness (Ra) and 6 μm of total roughness (Rt). Knowing the importance of Inconel 718, as well as the need to combine the machining challenges with the required quality, the objective of this work was to find the experimental condition that results in better machining results. To find the optimal condition, the alloy was machined using two tools: experimental ceramic – Al2O3 + MgO (profile S) and commercial coated tungsten carbide (profile C). With Taguchi methodology, two experimental matrices were planned. For the ceramic tool, the machining occurred in the dry and under the following conditions: feed rates of 0.10–0.20–0.30 mm/rev; cutting speeds of 300–400–500 m/min; machining depths of 0.20–0.35–0.50 mm. The coated carbide tool was employed at a fixed machining depth of 0.5 mm, under the following experimental conditions: feed rates of 0.10–0.15–0.20–0.25 mm/rev; cutting speeds of 55–70–85–100 m/m... (Complete abstract click electronic access below)
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Hsieh, Yi-Nan, and 謝宜男. "The research of Adhesion and Hydrophobic Properties for Molecular Thin Film Coated on Tungsten and Tungsten Carbide Substrates." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/rs26x3.

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碩士
國立虎尾科技大學
機械與機電工程研究所
96
In high technicalization times, all informations have to spread through the display elements. The reliability and durably requirement of the display elements made from company become important in their service life. Due to the rapid progress in the development of precision machinery system and mircodevices, it has become increasingly important to study the mechanical phenomena of coating film in order to match these requirements. Although coating film can resist wearing of microparts, particles and water will increase the speed of wearing and transmission decay in atmosphere. It is necessary to use molecular thin film on coating film, in order to enhance the surface properties of mircodevices. Recently, self-assembled monolayers (SAMs) coating have been demonstrated to achieve anti-stiction and low friction characteristics when properly integrated into microstructure release process. The study work is to establish analysis and manufacture technology of SAMs on tungsten and tungsten carbide. For this purpose, several kinds of SAMs, including alkyl and biphenyl spacer chains with different surface head groups (-SH,-SiCl3,-Si(OCH3)3), and different terminal groups (-CH3,-COOH), were prepared. The influence of spacer chains, surface head groups, and terminal groups on adhesion, surface energy, water hydrophobic, friction, and transmission were investigated by AFM, contact angle measurement and ESCA and FTIR. In this study, it is found that OTS and ODT exhibits the smallest adhesive force and friction force for four material of OTS,ODS,ODT and MHA, because of low work of adhesion of -CH3 surface terminal group, and high-compliance long carbon chain.

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Tang, Fuh-Chyun, and 湯富俊. "High Speed Milling of Hardened SKD61 Tool Steel Using TiAlN Coated Cemented Tungsten Carbide Tooling." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/02923979184303312711.

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碩士
國立清華大學
動力機械工程學系
88
The terms ''High Speed Machining'' (HSM) and ''High Speed Cutting'' (HSC) have been used recently to describe end milling with small diameter tools at high rotational speeds, typically 10,000-100,000 rpm. HSM was first applied in the aerospace industry for the machining of light alloys, notably aluminum. In recent years the mould and die industry has begun to use the technology for the production of components, including those manufactured from hardened tool steels. The study is performed an experimental investigation of high speed (5,000 - 15,000 rpm) ball milling of hardened (hardness 40 - 53 HRC) JIS SKD61 (AISI H13) tool steels using TiAlN coated cemented tungsten carbide tooling. The machining parameters involved were; highest cutting speeds in the range of 49 to 205 m/min, feed per tooth variation from 0.025 to 0.05 mm/tooth, axial depth of cut from 0.25 up to 0.5 mm, and radial depth of cut of 0.2 mm. Dry and flood coolant cutting conditions were used. The effects of different process parameters on the tool wear, tool life, chip formation, cutting force and workpiece surface finish have been studied. The experiment results show that higher cutting speed is recommended especially when workpiece hardness of 53 HRC was machined. Dry cut is also recommended. An unusual phenomenon observed, tool worn out slower at the higher spindle speed (higher cutting speed) when workpiece hardness of 53 HRC was machined.

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Wu, Jui-Hsiang, and 吳瑞祥. "Application of Cryogenic Treatment to Enhance the Tool life of the TiAlN Coated Tungsten Carbide Milling Cutter." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/5h5n78.

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碩士
正修科技大學
機電工程研究所
107
Cutting tools are important to manufacturing industry and affect production efficiency, quality and part accuracy. Tungsten carbide is one of the most commonly used in cutting tools. TiAlN is often coated on the cutting tool because it has high wear resistance and high temperature oxidation resistance. Cryogenic treatment has been widely used in tools, cutting tools and mold industry, etc., which can improve material properties by decreasing residual stress, stabilizing dimensional accuracy and increasing the wear resistance. The purpose of this study is to discuss the feasibility of cryogenic treatment to improve the TiAlN tungsten carbide milling cutter life for cutting the Inconel 625. Tool life test results exhibit that, without cryogenic treatment, chip and wear with the largest range exist in cutter tools. However, with cryogenic treatment, the wear range is narrow and no chipping. These verify that cryogenic treatment can enhance life of tungsten carbide milling cutter. According to the XRD result, the residual stress is less after cryogenic treatment. The optical microscope and scanning electron microscope (SEM) results indicate that after cryogenic treatment, the microstructure is denser and the adhesion of coating and tungsten carbide is better. From the above test results, it is shown that the service life of TiAlN coated milling cutter after cryogenic treatment can be effectively improved due to the denser microstructure、less residual stress and better adhesion.

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Leu, Tzong-Lin, and 呂宗麟. "The Tribological Performance of Cemented Tungsten Carbide Uncoate -d and Coated TiN,TiN/TiCN,CrN by The Cathodic Arc PVD Process." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/59066602921335729478.

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Lo, Chi-Hung, and 羅啟宏. "High Speed Cutting Performance of Nanocomposite Hard Coated Tungsten Carbides for Ti-6Al-4V Titanium Alloys." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/x85ezm.

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碩士
國立虎尾科技大學
機械與電腦輔助工程系碩士班
101
This study uses new CAE system as main research equipment. And using high-purified Ti-target to make high hardness TiAlSiN and CrAlSiN Nano-composite coating on Micron-powder Tungsten Carbides tools. Through different gas flow in different process parameters and process pressure, controlling the proportion of Ti, Cr, Al, and Si. Planning tools test and comparing the pre-coating with pro-coating Tungsten Carbides tools in order to design the best Nano-composite hard coat with high-temperature endurance and low adhesive property, and further improving Ti-6Al-4V cutting performance. The result shows that under high-speed Ti-6Al-4V cutting, the life of Tungsten Carbides tools with TiSiN coating improves about 25-30%, and makes TiAlSiN the best tool coating when cutting Ti-6Al-4V. When cutting Ti-6Al-4V materials, adding coolant properly will promote tool life. Any type of coating wearing inclines to be mechanical wear when cutting speed is under 150m/min. But the main reason of any type of coating wearing is Ti-6Al-4V adhesive property when cutting speed is over 350m/min, which makes friction resistance increasing and leads to tool damage. Therefore, CrAlSiN coating is not the best choice when doing Ti-6Al-4V cutting because it produces massive Ti-6Al-4V adhesiveness.

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Book chapters on the topic "Coated tungsten carbide"

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Gou, Li, Ji Lei Zhu, Jun Guo Ran, and Suang Feng Yan. "Diamond Coated on Cobalt-Deficient Gradient Tungsten Carbide." In High-Performance Ceramics III, 1889–92. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-959-8.1889.

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Sampath Kumar, T., A. Vinoth Jebaraj, K. Sivakumar, and P. Mathivanan. "Machinability Studies of TiAlN-/AlCrN-Coated and Uncoated Tungsten Carbide Tools on Turning EN25 Alloy Steel." In Lecture Notes in Mechanical Engineering, 213–21. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2697-4_24.

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Sivaramakrishnaiah, M., P. Nandakumar, and G. Rangajanardhana. "Experimental and FEA Simulation of Thermal-Fluid Interaction Between TIN Coated Tungsten Carbide Tool and Inconel-825 Workpiece." In Intelligent Manufacturing and Energy Sustainability, 441–51. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1616-0_43.

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Ramesh, K., K. Gnanasekaran, S. Prathap Singh, and M. Thayumanavan. "Optimization of Turning Process Parameters in Machining of Heat-Treated Ductile Iron Bar Using TiC/TiCN/Al2O3-Coated Tungsten Carbide Tool." In Lecture Notes in Mechanical Engineering, 445–53. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3631-1_43.

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Kaku, Tsuyoshi, Nobuhito Yoshihara, Ji Wang Yan, Tsunemoto Kuriyagawa, Kazuhiko Abiko, Yoshiharu Mikami, and Masahiro Noguchi. "Development of a Resin-Coated Micro Polishing Tool by Plasma CVD Method -Electrorheological Fluid-Assisted Polishing of Tungsten Carbide Micro Aspherical Molding Dies-." In Advances in Abrasive Technology IX, 213–18. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-416-2.213.

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Jaritngam, P., C. Dumkum, and V. Tangwarodomnukun. "Surface characteristics of TiN, TiAlN and AlCrN coated tungsten carbide." In Material Science and Engineering, 81–84. CRC Press, 2016. http://dx.doi.org/10.1201/b21118-18.

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Hatel, Rhizlane, and Mimouna Baitoul. "Synthesis of WO3 Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach." In Nanomechanics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95862.

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Trioxide Tungsten (WO3), an n-type semiconductor that exhibits a wide band gap of 2.5 to 3.6 eV, has attracted special attention from the scientific community. This attraction is due to its manifold properties, which not only follow the development of technologies, but accelerate it. There are several methods to synthesize WO3 nanostructures with various morphologies. In the present study, for the first time, a novel chemical method was developed for the preparation of WO3 nanostructures by using tungsten carbide (WC) as precursor. This novel approach has many advantages such as high yields, simple methodology and easy work up. Moreover, graphene oxide coated with WO3 nanostructured is prepared via in-situ and ex-situ chemical approaches followed by subsequent thermal treatment at 500°C. The obtained samples were characterized by different techniques to confirm the transformation of WC to WO3 nanostructures and the formation of their nanocomposites with graphene derivatives.

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STAVROS, A. J., and J. V. REID. "WEAR BEHAVIOR OF DETONATION GUN TUNGSTEN CARBIDE COATED STEEL vs. ALUMINUM." In Metallurgical Coatings and Thin Films 1990, 768–78. Elsevier, 1990. http://dx.doi.org/10.1016/b978-1-85166-813-7.50079-6.

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Stavros, A. J., and J. V. Reid. "Some tribological observations of sliding tungsten carbide coated steel against aluminum." In Metallurgical Coatings and Thin Films 1992, 521–28. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89900-2.50093-2.

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"Tool wear of aluminum/chromium/tungsten-based-coated cemented carbide in cutting hardened steel." In Sports Engineering and Computer Science, 471–76. CRC Press, 2015. http://dx.doi.org/10.1201/b18408-106.

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Conference papers on the topic "Coated tungsten carbide"

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Sadat, Abdul B. "Machining Al2O3/6061Al Metal Matrix Composites Using Coated Tungsten Carbide Inserts." In ASME 2002 Engineering Technology Conference on Energy. ASMEDC, 2002. http://dx.doi.org/10.1115/etce2002/trib-29098.

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An experimental procedure is used to machine 20 vol.% Al2O3/6061Al metal matrix composites using coated tungsten carbide cutting inserts in a finish turning operation. The turning operations were carried out at various cutting speeds and feed rates, at a constant depth of cut, and with the application of a coolant. Tool wear lengths at two locations, at the flank of the primary cutting edge and at the flank of the nose of the tool were measured for each cutting test after the removal of a predetermined volume of material. It was found that the wear lengths at both locations of the tool increased with a decrease in feed rate due to the increase in cutting time as the feed rate decreased. It was also found that for a given speed and feed rate the wear on the flank of the nose was higher than that of the primary cutting edge. This was attributed possibly to the presence of the built-up edge on the rake face of the tool. Surface roughness, generally, increased with an increase in cutting time that was explained in terms of an increase in nose wear length as the cutting time was increased.

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Ganapathy, Sakthinathan, Anand Kumar Appancheal, and Raja Velusamy. "Experimental Analysis of Performance and Emission Characteristics of Tungsten Carbide Coated Piston." In International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-28-1981.

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Ahmed, R., M. Hadfield, and S. Tobe. "Residual Stress Analysis in Thermal Spray Coated Rolling Elements." In ITSC 1996, edited by C. C. Berndt. ASM International, 1996. http://dx.doi.org/10.31399/asm.cp.itsc1996p0875.

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Abstract The full potential of rolling element bearings operating in specialised conditions such as high speed and corrosive environments are realised using surface coatings. Tungsten Carbide coating by thermal spray HVOF and D-Gim processes are considered for these applications. An experimental approach using a modified four-ball machine simulates the tribological conditions within a rolling element bearing. The fatigue failure modes of the tungsten carbide coating in rolling contact with steel and silicon nitride are examined using conventional surface analysis techniques. The stress fields within the coating are examined using traditional contact theory and residual stress measurement by X-ray diffraction. The residual stress measurements of the pre-test coating, the contacting surface and the fatigue failures are described. Results of residual stress relating to orientation, failure depth, coating thickness are discussed along with the fatigue failure mode.

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McGrann, R. T. R., J. R. Shadley, E. F. Rybicki, D. J. Graving, B. E. Badger, D. A. Somerville, and W. A. Emery. "Fatigue Life in Bending and Coatings Residual Stress in Tungsten Carbide Thermal Spray Coatings." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0737.

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Abstract Tungsten caibide (WC) thermal spray coatings are being used for wear protection on selected components of aircraft. Tungsten carbide coatings are being used on aircraft flap tracks and fan and compressor blade mid-span dampers. However, a larger use of tungsten carbide coatings is being considered for other commercial aircraft applications where it would be used as a replacement for chrome plating. For instance, WC coatings are currently being tested on aircraft landing gear parts. One factor that affects the suitability of WC coatings for these applications is the fatigue life of the coated part. Coatings, whether chrome plating or thermal spray coating, can reduce the fatigue life of the part compared to an uncoated part. This study compares the fatigue life of uncoated 6061 aluminum specimens to the fatigue life of WC thermal sprayed coated 6061 aluminum specimens. The relation between the residual stress level in the coating and the fatigue life of the specimens is also investigated. Fatigue tests were run on cantilever flat beam specimens that were coated on one side. Specimens were cycled in bending so that the coatings experienced tensile fatigue stresses. Residual stress levels for each type of coating were determined using the Modified Layer Removal Method on specimens processed along with the cantilever flat beam specimens. Test results show that the fatigue life of the WC coated specimens is directly related to the level of compressive residual stress in the coating.

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Parbhane, Udhav, and Dilip Khedekar. "Investigations on Milling of HDS H-13 with Bi-layer Coated Tungsten Carbide Tool." In 2020 International Conference on Smart Innovations in Design, Environment, Management, Planning and Computing (ICSIDEMPC). IEEE, 2020. http://dx.doi.org/10.1109/icsidempc49020.2020.9299603.

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Bardasz, Ewa, Christopher G. Scott, Susan V. Cowling, and James C. Matasic. "Coated Valve Train Components and Low Emission Engine Oils in a Fired Engine Enviroment." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64127.

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A series of heavy-duty diesel, fired engine tests were run using coated valve train components in combination with low emission diesel engine crankcase oils. Examination of coated rocker arm and corresponding, uncoated crosshead surfaces, showed that greater crosshead wear was encountered using a physical vapor deposition (PVD) chromium nitride coating, as compared with that observed using a tungsten carbide PVD composition, or an uncoated rocker arm surface. Good coating adhesion was observed with both coatings, with no adverse effects on neighboring, uncoated surfaces. Tungsten carbide in combination with the first of two low-emission engine oils out performed either of the oils used in combination with chromium nitride. Test parameters are summarized along with key engine data obtained. Observations from surface characterization of representative rocker arm and mating crosshead components, using optical and scanning electron microscopy coupled with energy dispersive spectrometry also are highlighted and discussed.

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Mcgrann, R. T. R., J. R. Shadley, E. F. Rybicki, B. E. Bodger, W. A. Emery, D. A. Somerville, and D. J. Greying. "Evaluation of Residual Stresses and Fatigue Life of Tungsten Carbide Thermal Spray Coated Aircraft Landing Gear Materials." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0557.

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Abstract Tungsten carbide thermal spray coatings have been used for more than twenty years in the commercial aircraft industry in applications such as turbine blade and flap-track wear surfaces. Additionally, the evaluation of tungsten carbide (WC) coatings to replace chrome plating in other aircraft applications has been underway for several years. For example, WC coatings applied by the high velocity, oxy-fuel (HVOF) process are being evaluated for use on aircraft landing gear parts. One factor that affects the suitability of WC coatings is the fatigue life of the coated part. This study compares the fatigue life of electrodeposited chrome plated specimens to the fatigue life of WC HVOF-sprayed specimens on aircraft landing gear alloys. Fatigue tests were run on cantilever flat beam specimens coated on one side and subjected to bending fatigue loads. Residual stress levels for the coatings were determined using the Modified Layer Removal Method on rectangular residual stress specimens processed with the flat beam specimens. Also, the Young's modulus and Poisson's ratio of the coating were determined using the Cantilever Beam Bending Method performed on beam specimens that were processed with the fatigue specimens and the residual stress specimens. Results indicate that certain levels of residual stress in the coating can enhance the fatigue life of the parts. The fatigue lives in bending tests of several WC coated specimens are compared with the fatigue life of chrome plated specimens.

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Swan, Samuel, Jacob Jones, Dae-wook Kim, Dinh Nguyen, and Patrick Kwon. "Tool Wear of Superhard Ceramic Coated Tools in Drilling of CFRP." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6551.

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This paper aims to investigate the effectiveness of super-hard ceramic coatings by evaluating tool wear when drilling carbon fiber reinforced plastics (CFRP) composite. The drilling experiments of CFRP are conducted with diamond-like coating (DLC) coated, AlMgB14 (BAM) coated, AlCrSiN coated, and uncoated tungsten carbide drills. Tool wear evolution is measured qualitatively as well as quantitatively using the scanning electron and confocal laser scanning microscopes. Both DLC and BAM coatings failed when drilling CFRP only within 10 holes while AlCrSiN coating did not fail. Failure mechanisms of each coating when drilling CFRP are discussed.

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Abou-Hanna, Jeries, John Carlson, and Jose´ Lozano. "Chemistry Consistency Analysis of Tungsten-Doped Diamond-Like Carbon (DLC) Coatings." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79136.

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Tungsten-doped diamond-like carbon (DLC) coatings have been magnetron sputtered onto 52100 steel with chromium and chromium/tungsten carbide dual interlayers using a Hauzer Techno Coating HTC 1200 4 UBM unbalanced magnetron deposition system. Internal fixturing to the deposition chamber rotates parts to be coated with a two degree of freedom system. By design, at certain intervals during the deposition, the acetylene flow is linearly altered to change film characteristics throughout the film. AES sputter depth profiling analysis shows that the fixture rotational system, designed to uniformly coat parts, causes localized chemistry variations in the coating. For a given location, the AES depth profile also clearly documents the intervals when acetylene flow was constant and when the flow was ramped.

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Hu, Jianwen, Kevin Chou, and Raymond G. Thompson. "Interface Effects on Coating Failure of Diamond Coated Cutting Tools." In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72309.

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Despite the superior tribological and mechanical properties, the advantages of diamond coated tools have been largely compromised by the insufficient adhesion. Interface characteristics play a vital role in the failure and performance of diamond coated tools. Thus, quantitative modeling of the coating-substrate interface is important to the design and usage of diamond coating tools. In this study, a cohesive zone model was incorporated to investigate the diamond coating on a tungsten carbide substrate. The cohesive zone model is based on the traction-separation law, and is represented by four parameters, determined from the tungsten-carbide fracture properties. The cohesive zone model was implemented in finite element codes to simulate the indentation process, using a spherical diamond indenter. The model was applied to examine the interface effects during indentation and the coating property effects on different coating failure modes. The simulation results are summarized as follows. (1) Normal mode delamination is the dominant mechanism of interface failure and takes place during unloading if the substrate yielding occurs during the loading stage. (2) The cohesive zone interface does not affect the critical load for coating surface tensile cracking, but affects the plastic strain during loading. In addition, for thin coatings, the maximum stress location changes between the perfect interface and cohesive zone interface cases. (3) Elasticity has a complex effect on coating failure. As the coating elasticity increases, the critical load for coating cracking decreases, but the critical load for substrate yielding increases slightly. Moreover, the interface delamination size will decrease with increasing coating elasticity.

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