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of quenching water temperature on microstructure and mechanical properties of ZL210A alloy MA Yu1, XU Zhi-feng1, CAI Chang-chun1, ZHANG Yong-cai2 (1. National Defence Key Discipline Laboratory of Light... of quenching water temperature on the microstructure,fracture morphology and mechanical properties of ZL210A alloy was studied by tensile tests, optical microscopy, scanning electron microscopy......
Optimising Gas Quenching Technology through Modelling of Heat Transfer Qingfei Zhang1,Aymeric Goldsteinas2,Xavier Doussot2,Florent Chaffotte3,Didier Domergue3,Linda L4 (1.Air Liquide Shanghai Co., Ltd, Shanghai, PR China;2.ECM Service, Fontaine, France;3.e;4.e)fevre(e) 摘要:Gas Quenching represents an environmentally friendly alternative to more commonly-used oil quenching. Yet,the performances......
多η相在亚晶界上的非均匀形核析出在一定程度上增加了合金的淬火敏感性,但该制度处理的合金仍优于再结晶程度较高的快速升温双级均匀化制度的. 关键词:7050铝合金；均匀化制度；Al3Zr；淬火敏感性；组织演变 中图法分类号:TG146 文献标志码:A Effect of homogenization on quenching.... The influence of such processing on the quenching sensitivity was investigated by different homogenization methods. The results show that the equilibrium η phase mainly precipitates at areas......
基于奇异值分解及PRESS统计的模型结构优化方法李德才,韩敏大连理工大学电子信息与电气工程学部摘 要:针对线性参数模型的基函数选择问题,结合奇异值分解和PRESS统计提出一种模型结构优化算法.通过预先对候选基函数矩阵进行分块操作,减少非最优列间的重复比较.在此基础上,对各子块采用奇异值分解与PRESS统计相结合的方法进行选择,直接以模型的泛化能力作为目标,自适应地选择基函数.通过奇异值分解,在降低候选基函数数量的同时,使其彼此之间相互正交,有效地简化了PRESS统计的计算复杂度.仿真结果表明,所提出的方法能够有效简化模型结构,并保持较高的预测精度.关键词:奇异值分解;模型结构优化;PRESS统计;稀疏基选择;......
Cold extrusion deformation behavior of medium carbon steel after quenching and tempering HU Cheng-liang(胡成亮)1, ZHAO Zhen(赵 震)1, YIN Guan-ren(尹冠人)1, YUAN Zhao-feng(袁兆峰)2, XU Xiang...; Abstract: By taking 40Cr as a specific object, cold extrusion deformation behavior of medium carbon steel after quenching and tempering was studied by experimental works. The influence......
of electro-hydraulic servo system for SRM direct-drive volume control hydraulic press ZHENG Jian-ming(郑建明)1, 2, ZHAO Sheng-dun(赵升吨)1, WEI Shu-guo(魏树国)1 1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China; 2. School of Mechanical Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, China ? Central South University Press and Springer-Verlag......
"Press"铝炉渣处理系统王祝堂摘 要:"Ｐｒｅｓｓ"铝炉渣处理系统美国宾夕法尼亚州埃克斯顿市(Ｅｘｔｏｎ,ＰＡ)的阿尔特克国际公司(ＡｌｔｅｋＩｎｔｅｒｎａｔｉｏｎａｌ)发展了一套居世界领先地位的铝渣回收处理系统,即"Ｐｒｅｓｓ"回收工艺.当前全世界的铝工业(铝电解,铝加工厂的熔炼,废杂...关键词:......
Quenching Simulation of PM Coated Tools Christoph Broeckmann1,Axel H2,Werner Theisen3 (1.Koppern Entwicklungs-GmbH, Hattingen, Germany;2.o)fter(o;3.o) 摘要:HIP cladding is a powder metallurgical... are used. On the one hand, the transient heat conduction problem of the quenching process has to be solved. Non-linear boundary conditions and phase transformation of both, substrate and layer are considered......
PRESS FORMABILITY OF YAG LASER WELDED TRIP STEEL SHEETS A.Nagasaka1 (1.Department of Mechanical Engineering, Nagano National College of Technology, 716 Tokuma, Nagano 381-8550, Japan) Abstract... dual-phase (TDP) steel were investigated.Tensile tests and press forming tests have been conducted for laser butt welded jointsbetween two pieces of the same steel. The tensile property and press......
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