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Effect of combined electromagnetic fields on surface quality and structure of a HDC casting 5182 Al alloy ingotQingfeng ZHU,Zhihao ZHAO,Yubo ZUO,Xiangjie WANG and Jianzhong CUI Key Laboratory... are produced by conventional and combined electromagnetic fields (CEMF) horizontal direction chill (HDC) casting process.The effect of CEMF on the ingot surface quality and floating grains......
by double-ended piercing method.The quality evaluation of micro-double gear was conducted with surface roughness,micro-hardness and impact tests.The results show that the micro-double gear with good...Hybrid Micro-forming Processes and Quality Evaluation of Micro-double Gear徐杰School of Materials Science and Engineering,Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry......
for engine machine, and good surface quality is beneficial to lubrication [1-4]. Laser surface texturing, as a means for enhancing tribological performance of contact components, has gained an increasing...J. Cent. South Univ. Technol. (2010) 17: 906-910 DOI: 10.1007/s11771-010-0575-4 Cooperative effect of surface alloying and laser texturing on tribological performance of lubricated surfaces......
均高于进口试样的,但由于形成了较多大块状,硬而脆的Fe2Si2Al9相,导致国产型材的强度虽稍高于进口型材的,但其伸长率却大幅度下降,也影响型材的表面质量. 关键词:6061散热铝型材;硬质相;表面质量 中图分类号:TB31 文献标志码:A Effect of hard phases on surface quality of 6061... in the domestic profile, which can scratch the surface of molds and worsen the surface quality of profiles. With higher contents of Mg and Si, the strength of the domestic profile is slightly higher than......
on as-cast microstructures and surface quality were investigated. The results show that the out-phase magnetic field changes the flow of metal melt, reduces the corner, reduces the temperature gradient... the crystallizer and the initial skull, decreases the friction of ingot surface, restrains the form of segregation burl, and improves the surface quality of Al alloy hollow billet. Key words: aluminum alloy......
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. The surface quality of the formed part can also be improved by adjusting the hardness of the forming tool in the forming of GA steel. However, it is not the forming tool with the highest hardness that performs... Surface topography evolvement of galvanized steels in sheet metal forming HOU Ying-ke(侯英岢)1, YU Zhong-qi(于忠奇)1, ZHANG Wei-gang(张卫刚)1, JIANG Hao-min(蒋浩民)2, LIN Zhong-qin(林忠钦)1 1......
were electrodeposited at different fluid field distributions, and their thickness uniformity, surface quality and accuracy of nanostructures were studied. The results show that the rotating cathode...% and 20.93%, respectively. The surface quality and accuracy of the nanostructures of the electrodeposited stamps are significantly improved. The electrodeposited stamp can be applied in the nano-molding......
Article ID: 1003-6326(2005)06-1264-11 Effect of mandrel on cross section quality of thin-walled tube numerical controlled bending GU Rui-jie(谷瑞杰), YANG He(杨 合), ZHAN Mei... with the structure of ball and socket on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical analysis......
Assessment of temporal and spatial variations in surface water quality using multivariate statistical techniques: a case study of Nenjiang River basin, ChinaZHENG Li-yan(郑力燕), YU Hong-bing(于宏兵), WANG Qi-shan(王启山)(College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China)Abstract:Assessment of temporal and spatial variations in surface water quality is important......