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in producing four-way valve of HPb59-1 alloy for an air-conditioner by traditional solid state hot forging, i.e. larger forming loads, lower material utilization, larger subsequent machining allowance and nonuniform microstructure. For this reason, based on the orthogonal test, the semisolid diecasting process of a certain type of four-way valve was simulated with FLOW-3D. The simulation results show......
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J. Cent. South Univ. Technol. (2010) 17: 1021-1027 DOI: 10.1007/s11771-010-0593-2 Method of triangular mesh modeling in numerical control machining simulation MA Zhi-yan(马志艳), CHEN You-ping(陈幼平...-Verlag Berlin Heidelberg 2010 Abstract: In the process of numerical control machining simulation, the workpiece surface is usually described with the uniform triangular mesh model. To alleviate......
in length. The billets were pressed by RD-ECAP for 16 and 32 passes at 623 K and 673 K. Impact toughness test specimens were made from RD-ECAP processed billets by machining along the longitudinal... Deformation mechanism at impact test of Al-11% Si alloy processed by equal-channel angular pressing with rotary die MA Ai-bin(马爱斌)1, Y. NISHIDA2, JIANG Jing-hua(江静华)1, N. SAITO2, I. SHIGEMATSU2......
Fabrication and test of reaction bond silicon carbide for optical applications YAO Wang(姚 旺), ZHANG Yu-min(张宇民), HAN Jie-cai(韩杰才), ZUO Hong-bo(左洪波) Center for Composite Materials, Harbin... thermal distortion. This advantage is outstanding even at higher temperature of test range. Two d 250 mm RBSiC mirror were polished. Surface roughness value less than 5 nm was obtained. Results prove......
Machining of the Flat Surfaces with Abrasive-metallic Lapping Tools Adam Barylski1 (1.Gdansk University of Technology, Gdansk, Poland) 摘要:The constructional principle of abrasion metal disc is that abrasive insertions are spread uniformly on the working surface of a metal base. During lapping by means of such tools only the machining fluid is dosed and that by drop.Abrasive elements......
Characteristic evaluation of Al2O3/CNTs hybrid materials for micro-electrical discharge machining Hyun-Seok TAK1, Chang-Seung HA2, Ho-Jun LEE2, Hyung-Woo LEE1, Young-Keun JEONG1, Myung-Chang... machining (EDM) was described. Alumina matrix composites reinforced with CNTs were fabricated by a catalytic chemical vapor deposition method. Al2O3 composites with different CNT concentrations were......
Dry Machining Tool Design via Chlorine Ion Implantation Atsushi Mitsuo1,Shinji Muraishi2,Shigeo Yamamoto1,Tatsuhiko Aizawa3,Taro Sumitomo3 (1.Tokyo Metropolitan Industrial Research Institute, Tokyo, Japan;2.Department of Materials Science Technology, Tokyo Institute of Technology, Tokyo, Japan;3.Center for Collaborate Research, University of Tokyo, Tokyo, Japan) 摘要:Dry machining has become......
. Furthermore, the nc-TiAlN/a-Si3N4 coating shows the best machining performance. Key words: TiN coating; alloying element; hardness; cutting test 1 Introduction TiN coatings, which have served... by nanoindentation with a Fischerscope H100VP based on the Oliver and Pharr method [13]. According to the experimental results of the large-load (30 mN) penetration test, a smaller penetration load of 8 mN......
