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Journal articles on the topic 'Die-casting. Extrusion process'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Zheng, Wei Gang, Cun Hong Yin, Yu Hong Yuan, Zhen Min Pan, and Chao Tang. "Study on Local Extrusions' Effects on Improvement of Die Casting Prismatic Parts' Forming Quality." Applied Mechanics and Materials 312 (February 2013): 475–79. http://dx.doi.org/10.4028/www.scientific.net/amm.312.475.

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This paper analyzes traditional die casting process to find out the reasons that cause shrinkage cavity and porosity defects in casting. An optimized process of die casting by using local extrusion is proposed. A device used in local extrusion which realizes forcing compensating contraction on key parts of crankcase is designed and the parameters of local extrusion process are discussed. Compared the mechanical properties and microstructure of local extrusion used in die casting production with traditional. It shows that local extrusion used in die casting production can not only achieve the a

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2

Zheng, Wei Gang, Zhi Jun Liu, Ning Yang, Chun Long Li, and Xin Yang. "Simulation Analysis and Studying of Die Casting Forming Process for Crankcase." Applied Mechanics and Materials 496-500 (January 2014): 849–52. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.849.

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In recent years, with the rapid development of automobile, the production of complex parts adopt the die casting process such as crankcase box. the stress of market competition make greater demand on Casting Products quality, such as the organizational structure of products has no shrinkage porosity defect and has good mechanical properties. this articles simulation analysis of die casting forming process for Box are based on software AnyCasting, analyzing the reasons of air trapping from the filling process, Solidification sequence, Residual melt modulus. and it can conduct local extrusion fe

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3

Du, Zhi Ming, Pei Tang Zhao, Li Dong Wang, and Wei Dong Fei. "Influence of Die Angle on the Extrusion Behavior of 6061Al Matrix Composite Reinforced with SnO₂-Coated Aluminum Borate Whisker." Advanced Materials Research 299-300 (July 2011): 700–703. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.700.

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The 6061Al matrix composites reinforced with SnO2-coated aluminum borate whisker were fabricated using squeeze casting method. The composite were extruded successfully at 350°Cwith different die angles. The experiment results illustrate that the die angle have important influences on the extrusion process. The surface quality of extruded composites was improved and the extrusion load was reduced with die angle increasing from 30 to 60 degree. The <111> and <100> textures for aluminum matrix were formed in all extruded composites. The dispersion degree of the <111> texture, th

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4

Zhou, Ming, Jianyong Cao, Fulin Yu, and Xia Wei. "Evaluation of Magnesium Extrusion Production." Materials Science Forum 488-489 (July 2005): 483–86. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.483.

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Compared with any other pressure processing methods, extrusion is more prone to develop the plasticity of the metal. Extrusions have much better size precision and surface quality than products by rolling and forging. As one-shot molding process, extrusion can eliminate some machining. In addition, extrusions have very high strengths and elongations because of their compact interior structures and fine grains. This paper summarizes some experiences and plans in extrusion production of CQMST(Chongqing Magnesium Science & Technology Co.Ltd). Magnesium, a plentiful element with density of 1.7

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5

Lee, Byoung Soo, Dae Heon Joo, Hoon Cho, Hyung Ho Jo, and Myung Ho Kim. "Aging Behavior of Al-Cu Alloys Produced by Melt Extrusion Process." Solid State Phenomena 116-117 (October 2006): 550–53. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.550.

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Melt extrusion is a new fabrication process with the characteristics of both casting and extrusion. In this process, a metallic melt which is poured and solidified up to semisolid state in the container can be directly extruded through the die exit to form a product of bar shape without other intermediate processes. The aging behavior of Al-Cu alloys in the semisolid state was investigated. And the microstructure and mechanical properties of the melt extruded Al-Cu alloy bar were measured and its characteristics are compared with those of a hot extruded Al-Cu alloy bar. Al-Cu alloys were succe

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6

Le, Qi Chi, Zi Qiang Zhang, and Jian Zhong Cui. "Microstructures and Mechanical Properties of AZ31B Extruded Sheets from Different Casting Processing." Materials Science Forum 546-549 (May 2007): 399–402. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.399.

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A novel way producing magnesium billets, LFEC (low frequency electromagnetic casting processing), was developed in Northeastern University in China. The high-quality magnesium billets with less macrosegregation, refined microstructure, and better surface quality were achieved because the temperature field and the flow pattern of magnesium DC casting were improved significantly after applying low frequency electromagnetic field. Extrusion is an important plastic deformation process for magnesium alloys. In this research, the magnesium billets from LFEC were extruded through a special designed d

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7

Hu, H. J., S. L. Gan, Y. Tian, D. F. Zhang, J. K. Feng, and Z. W. Ou. "Evaluation of chilled casting and extrusion-shear forming technology based on numerical simulation and experiments." Materials Testing 63, no. 8 (2021): 728–35. http://dx.doi.org/10.1515/mt-2021-0002.

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Abstract Magnesium alloys on the surface of billets might be refined by chilled casting process, but the grains of the center of billets are coarse, and there are a lot of void defects in the center of billets. These defects can be eliminated by hot extrusion, while fibrous microstructures and strong basal textures might be formed. This paper presents a new short process technology which includes chilled casting and extrusion-shear (CCES). It is crucial to understand the effects of die structures on the deformation behaviors, strain distribution and load requirements. Three selections of proce

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8

Lee, Byoung Soo, Dae Heon Joo, and Myung Ho Kim. "Microstructures and Mechanical Properties of Melt Extruded Al-Cu Alloys." Solid State Phenomena 116-117 (October 2006): 635–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.635.

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Melt extrusion is a new fabrication process with the characteristics of both casting and extrusion. In this process, a metallic melt which is poured and solidified up to semisolid state in the container can be directly extruded through the die exit to form a product of bar shape without other intermediate processes. The effects of various process parameters, such as melt temperature and extrusion ratio, on the extrusion behavior of Al-Cu alloys in the semisolid state were investigated. Mechanical properties of the melt extruded Al-Cu alloy were measured and its characteristics are compared wit

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9

Thete, Sumeet S., Pankaj Doshi, and Harshawardhan V. Pol. "New insights into the use of multi-mode phenomenological constitutive equations to model extrusion film casting process." Journal of Plastic Film & Sheeting 33, no. 1 (2016): 35–71. http://dx.doi.org/10.1177/8756087915627843.

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This article is concerned with the effect of the individual viscoelastic relaxation modes of a polymer melt on its behavior in polymer melt extrusion film casting process. We compare the predicted versus experimentally obtained film necking or neck-in profile as a function of draw ratio. The predicted necking profile was obtained using well-established one-dimensional isothermal flow kinematics and consisted of using two different phenomenological constitutive equations, upper convected Maxwell and Phan-Thien–Tanner, with a discrete spectrum of relaxation times. The numerical simulations, cont

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10

Lin, Qing Fu. "Research on Application of Processing Technology and Magnesium Alloy Materials." Advanced Materials Research 566 (September 2012): 548–51. http://dx.doi.org/10.4028/www.scientific.net/amr.566.548.

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Based on introducing the performance of magnesium alloys materials, analysis of magnesium alloy process performance mainly from chemical activity, electrochemical corrosion, the linear expansion coefficient of magnesium alloy; focuses on six kinds of magnesium alloy forming technology and processing problems in die casting, forging and extrusion forming, semi-solid forming, rapid solidification, provide a reference for magnesium alloy welding and surface coating technology.

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11

Nikawa, Makoto, Kengo Usui, Hiroaki Iwahori, Atsushi Sato, and Minoru Yamashita. "Estimation of Die Release Force of mboxJIS-ADC12 Aluminum Alloy Die Castings Manufactured Through High-Pressure Die Casting via Computer Simulation." International Journal of Automation Technology 12, no. 6 (2018): 955–63. http://dx.doi.org/10.20965/ijat.2018.p0955.

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A method for the estimation of the die release force of die castings of JIS-ADC12 aluminum alloy manufactured through high-pressure die casting was examined. The die release force was evaluated by the strain in the axial direction of the extrusion pin when releasing the die castings. In this research, it was assumed that the factors that influenced the die release force were the thermal deformation of the die and die castings and the reaction layer of Al and Fe generated during the solidification process in the die. These factors in the resistance of the die release were evaluated by the frict

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12

Lv, Qing Qing, Qi Ming Guan, Li Quan Yang, and Xi Kui Wang. "The Optimization Design Study of Warm Extrusion Forming Technology for Piston Head Semi-Processed." Advanced Materials Research 803 (September 2013): 375–78. http://dx.doi.org/10.4028/www.scientific.net/amr.803.375.

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Aiming at the problems of high performance piston head can not produced by using casting and hot die forging, the warm extrusion molding method is proposed, based on the analysis of factors influencing for forming, rational scheme of orthogonal experiment was designed, a series of analysis for simulation results by using the range analysis method and comprehensive balance method, the optimal forming process parameters combination are identified, the optimal result are verified by the DEFORM software.

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13

Rosen, G. I., G. Segal, and A. Lubinsky. "Large Profile Magnesium Alloys Extrusions for Automotive Applications." Materials Science Forum 488-489 (July 2005): 509–14. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.509.

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The aim of this project is to develop magnesium alloys extrusion technology for large profiles for application in the automotive industry. In particular it is expected to significantly reduce chassis weight, thus leading to fuel consumption reduction and enhancement of performance of the cars produced by the end user. The entire process required for magnesium alloys extrusion of automobile chassis will be addressed as a first attempt of large magnesium profile extrusion. The challenge of large magnesium profile extrusion (outer diameter up to 10") has never been addressed due to technological

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14

Tsuzuki, Ritsuko, and Katsuyoshi Kondoh. "In-Situ Solid-State Synthesis of Mg Composite with Mg₂Si Dispersoids." Materials Science Forum 475-479 (January 2005): 497–500. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.497.

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Super light and high performance Mg2Si/Mg composites, which had excellent mechanical properties, were developed via the combination of solid-state synthesis and hot extrusion process. In this study, cold compacting (CP) and repeated plastic working (RPW) were firstly carried out for the mixture of Mg-Si powders, and the refinement of both Mg grains and dispersoids. Each specimen was evaluated by observation of microstructure and tensile test. As a result, it was understood that Mg2Si dispersoids were refined and dispersed into Mg matrix, and were flowed along extrusion direction. And their mec

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15

Kang, Tae Ho, In Kwan Kim, and Young Soo Kim. "Injection Molding Process of Mg Alloy for Thin Plate." Key Engineering Materials 306-308 (March 2006): 863–68. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.863.

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Magnesium alloys are very attractive materials for applying to the development of automobile parts or electric goods where a lightweight and a higher strength need. Due to higher ratio of strength vs. weight and stiffness vs. weight, various magnesium alloys are well applied in much weight saving design applications though an extrusion or a die-casting process. However, for the requisites of higher strength and weight savings, some new fabrication processes has been and it can be realized though the aid of the injection molding technology. To obtain the parametric data based upon the injection

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16

Jou, Rong Yuan. "Convective Heat Transfer Measurements of Die-Casting Heat Sinks." Key Engineering Materials 419-420 (October 2009): 345–48. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.345.

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For applications of high-power LED illumination and advanced CPU electronic cooling, since the traditional plate heat sinks by aluminum extrusion are simple geometry only and with limited thermal performance, a new design and new fabrication process of heat sink for high-density heat flux applications is inevitable. In this study, a heat sink fabricated by vacuum die-casting is analyzed. To evaluate the thermal performance of this heat sink, two experiments, free convection measurements in an enclosure and forced convection measurements in a wind tunnel, are conducted by two experimental metho

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17

Huang, Song Jeng, Yeong-Maw Hwang, and Y. S. Huang. "Grain Refinement of AZ61/SiCp Magnesium Matrix Composites for Tubes Extruded by Hot Extrusion Processes." Key Engineering Materials 528 (November 2012): 135–43. http://dx.doi.org/10.4028/www.scientific.net/kem.528.135.

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Magnesium (Mg) alloys are gaining more recognition as a lightest structural material for light-weight applications, due to their low density and high stiffness-to-weight ratio. Nevertheless, their ductility is still not good for further metal forming and their strength is not large enough for real structure applications. The aim of this paper is to develop new magnesium metal matrix composites (Mg MMCs) reinforced with SiC particles by the stir-casting method for the hot extrusion processes to produce tubes. AZ61/SiCp MMCs ingots reinforced with 1, 2, and 5 wt% SiC particles are fabricated by

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18

Qi, Le Hua, Ji Ming Zhou, Li Zheng Su, Hai Bo Ouyang, and He Jun Li. "Fabrication of C_sf/Mg Composites Using Extrusion Directly Following Vacuum Infiltration - Part 2: Forming Process Study." Solid State Phenomena 141-143 (July 2008): 91–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.91.

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Extrusion directly following vacuum infiltration is a special forming technique that combines the advantages of liquid metal infiltration and semisolid extrusion. The major advantages of this process are elimination of porosity and shrinkage, good surface finish, good dimensional accuracy, high strength to weight ratio and near net shaping. Magnesium matrix composites are fabricated usually through stirring casting, powder forming, injecting deposition, liquid metal infiltration or die casting at present time. However few investigations on magnesium matrix composite are conducted for the speci

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19

Szymaneka, M., B. Augustyn, D. Kapinos, S. Boczkal, and J. Nowak. "The Production of Material with Ultrafine Grain Structure in Al-Zn Alloy in the Process of Rapid Solidification." Archives of Foundry Engineering 14, no. 2 (2014): 57–62. http://dx.doi.org/10.2478/afe-2014-0037.

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Abstract In the aluminium alloy family, Al-Zn materials with non-standard chemical composition containing Mg and Cu are a new group of alloys, mainly owing to their high strength properties. Proper choice of alloying elements, and of the method of molten metal treatment and casting enable further shaping of the properties. One of the modern methods to produce materials with submicron structure is a method of Rapid Solidification. The ribbon cast in a melt spinning device is an intermediate product for further plastic working. Using the technique of Rapid Solidification it is not possible to di

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20

Czerwinski, Frank. "Theory and Technology of Semisolid Metal Molding." Solid State Phenomena 141-143 (July 2008): 9–16. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.9.

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Fundamentals of semisolid metal molding, including the particulate feedstock, methods of its generation and features that make it useful for processing, are outlined. Melting characteristics of the feedstock under sole influence of heat are considered, covering a wide range of microstructural and microchemical factors, believed to be of importance at high temperatures. The generation of the thixotropic slurry within the injection molding system and its solidification behaviour are accompanied by detailed features of the molded structures and their correlation with properties of net-shape compo

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21

SALMAN, ASMA, BRIAN GABBITAS, PENG CAO, and DELIANG ZHANG. "TRIBOLOGICAL PROPERTIES OF Ti(Al,O)/Al2O3 COMPOSITE COATING BY THERMAL SPRAYING." International Journal of Modern Physics B 23, no. 06n07 (2009): 1407–12. http://dx.doi.org/10.1142/s0217979209061019.

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The use of thermal spray coatings provides protection to the surfaces operating in severe environments. The main goal of the current work is to investigate the possibility of using a high velocity air fuel (HVAF) thermally sprayed wear resistant Ti ( Al , O )/ Al 2 O 3 coating on tool steel (H13) which is used for making dies for aluminium high pressure die casting and dummy blocks aluminium extrusion. A feedstock of Ti ( Al , O )/ Al 2 O 3 composite powder was produced from a mixture of Al and TiO 2 powders by high energy mechanical milling, followed by a thermal reaction process. The feedsto

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22

Akhtar, S. S., A. F. M. Arif, and B. S. Yilbas. "Performance of Al-6063 Primary and Secondary Billets Used in Hot Aluminum Extrusion." Journal of Manufacturing Science and Engineering 131, no. 5 (2009). http://dx.doi.org/10.1115/1.4000098.

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The service life of tooling plays an important part in the economics of the extrusion process. A number of causes are considered responsible for initiating damage to the dies before its designated life is reached. Apart from other factors such as die design and manufacturing, heat treatment, working conditions, etc, the performance of the die can directly be related to the billet quality used in the extrusion press. The purpose of this paper is to investigate the effect of Al-6063 billet source (primary or secondary) on extrusion die failure, based on microstructural investigation. A secondary

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23

"Optimizing the Morphology of Primary Carbides and Mechanical Properties during Processing Of Cast-Steel (Din Gx210crv12 1) Press-Forming Dies." Advances in Materials Science and Engineering 2, no. 1 (2018). http://dx.doi.org/10.33140/amse/02/01/24.

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Cold work tool steels are used for punching, cutting, forming, cold forging, cold extrusion, cold rolling…etc. Those steels have hard microstructure compared to most other steels, but the everlasting challenge is the enough strength to toughness relation, without immediate fracture. Carbides provide the wear resistance, acting as the hard phase of the material. Variation in size and fraction of the carbides, depending of manufacturing route, alloy content, hot working/forging and heat treatment, will give the tool steel the desired mechanical properties. However, conventional cast-tooling is t

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