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Finite element analysis and simulation for cold precision forging of a helical gearFENG Wei (冯玮)1, HUA Lin(华林) 1,2, HAN Xing-hui(韩星会)2(1. School of Materials Science and Engineering, Wuhan University...:To investigate the effects of billet geometry on the cold precision forging process of a helical gear, six different billet geometries were designed utilizing the relief-hole principle......
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Effect of sputtering pressure and rapid thermal annealing on optical properties of Ta2O5 thin films ZHOU Ji-cheng(周继承), LUO Di-tian(罗迪恬), LI You-zhen(李幼真), LIU Zheng(刘 正) School of Physics...; Abstract: Ta2O5 thin films were deposited by DC reactive magnetron sputtering followed by rapid thermal......
J. Cent. South Univ. Technol. (2011) 18: 1487-1492 DOI: 10.1007/s11771-011-0864-6 Preset model of bending force for 6-high reversing cold rolling mill based on genetic algorithm CAO Jian-guo(曹建国... Heidelberg 2011 Abstract: The hydraulic roll-bending device was studied, which was widely used in modern cold rolling mills to regulate the strip flatness. The loaded roll gap crown mathematic model......
Article ID: 1003-6326(2005)03-0594-06 Reduction of TiO2 with hydrogen cold plasma in DC pulsed glow discharge ZHANG Yu-wen(张玉文), DING Wei-zhong(丁伟中), LU Xiong-gang(鲁雄刚), GUO Shu-qiang... cold plasma generated by a DC pulsed glow discharge was realized under 2500Pa at 1233K. Only a little of Ti10O19 and Ti9O17 was detected for using molecular hydrogen. Enhancement effects of hydrogen......
Assessment of rapid impact compaction in ground improvement from in-situ testingM. M. Mohammed, H. Roslan, S. Firas(Department of Civil Engineering, Faculty of Engineering, University of Malaya.... This work presents a case study of ground improvement using rapid impact compaction (RIC). The research site comprises the construction of workshop and depots as part of railway development project......
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管材进行冷弯,采用扫描电镜和光学显微镜等观察组织和断口,分析弯管断裂及表面缺陷的产生原因.结果表明:表面处理对管材冷弯成型影响不大;等轴组织管材冷弯成型良好,片状组织管材不能冷弯成型;调整数控弯管机的模具和工艺参数可制备外形质量良好的冷弯管材. 关键词:CT20钛合金;管材;组织;冷弯 文献标志码:A Cold bending of CT20 titanium alloy tubes LIU Wei, DU Yu , LU Ya-feng, MAO Xiao-nan, QI Yun-lian, GUO Ping (Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China) Abstract: The cold bending......
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Effect of vacuum heat treatment on microstructure and microhardness of cold sprayed Cu-4Cr-2Nb alloy coating LI Wen-ya(李文亚), GUO Xue-ping(郭学平), L. DEMBINSKI, LIAO Han-lin(廖汉林... treatment on the microstructure and microhardness of cold-sprayed Cu-4%Cr-2%Nb alloy coating was investigated. The heat treatment was conducted under the temperatures from 250 ℃ to 950 ℃ with a step of 100......