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; 文章编号:1672-7207(2008)05-1023-06 Forging speed’s response characteristic of moving beam drive system for 300 MN die forging hydraulic press HUANG Chang-zheng1, TAN...: Based on the compressibility, viscosity resistance and the working house system’s deformation etc, flow equations of distribution spool, hydraulic tube and fluid cylinder for 300 MN die forging......
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; 文献标志码:A Heat transfer behaviors between metal and die during filling process of thin-wall aluminum alloy under high pressure die casting conditions ZHU Bi-wu1, 2, LI Luo-xing1, 2, LIU Xiao1, 2...) Abstract: The thin-wall AlSi10MnMg aluminum alloy samples were prepared by high pressure die casting. The motion laws of press-shoot ram were recorded by a high speed camera system and the heat transfer......
of die forging driving system on extremely low speed XIE Jinjing, HUANG Minghui, LU Xinjiang, WANG Zhineng, DENG Kan (State Key Laboratory of High Performance and Complex Manufacturing, Central South University,Changsha 410083,China) Abstract: The steady operation of die forging equipment with large inertia was proposed in consideration of the isothermal forging of the sophisticated and integral......
:铝合金；高压压铸；微观孔洞；疲劳；三维X射线断层扫描；有限元分析 中图分类号:TG292 文献标志码:A Effect of micro-porosities on fatigue behavior of aluminum die castings WAN Qian, ZHAO Hai-dong, GE Ji-long (National... from practical ADC12 high pressure die castings were detected and reconstructed with high resolution X-ray computed tomography technology. The high cycle fatigue tests were carried out at five stress......
:TP273 文献标志码:A 文章编号:1672-7207(2010)03-0966-05 Speed tracking control of moving beam for 300 MN die... MN die forging hydraulic press was put forward and designed. The inner control loop is cam rotational angle PID-H∞ cascade control. The outer control loop is moving beam’s speed PFC control......
:A 文章编号:1672-7207(2009)01-0175-05 Intelligent control system for angle of dispenser in ten-thousand-ton multidirectional die forging hydraulic press YU... system for the dispenser used in ten-thousand-ton multidirectional die forging hydraulic press was analyzed. An intelligent control algorithm of two-times regulation of angle error was proposed, which......
; 文献标志码:A 文章编号:1672-7207(2018)01-0039-08 Finite element analysis of hot die forging process for large size AZ80... of Education,Central South University, Changsha 410083, China) Abstract: The hot die forging process of 764 mm AZ80 magnesium alloy was simulated by Pro/engineer three-dimensional modeling and Deform-3D finite......
Trans. Nonferrous Met. Soc. China 25(2015) 3505-3514 Low cycle fatigue behavior of T4-treated Al-Zn-Mg-Cu alloys prepared by squeeze casting and gravity die casting Cheng-kun ZHENG, Wei-wen ZHANG, Da...: Gravity die casting (GC) and squeeze casting (SC) T4-treated Al-7.0Zn-2.5Mg-2.1Cu alloys were employed to investigate the microstructures, mechanical properties and low cycle fatigue (LCF) behavior......
基于改进CA方法的压铸镁合金微观组织模拟吴孟武1,熊守美1(1.北京市清华大学机械工程系汽车安全与节能国家重点实验室)摘 要:针对具有快速凝固特征的压铸工艺,通过热传导反算法得到较准确的压铸温度场,分析压铸镁合金凝固过程冷却曲线,建立了形核密度随冷却速率变化的形核模型.采用改进CA方法,建立了适用于镁合金hcp结构的枝晶生长模型.模型考虑了溶质扩散,成分过冷,曲率过冷以及界面各向异性等重要因素,实现了镁合金不同角度枝晶生长,再现了枝晶二次及三次枝晶臂生长,定向凝固不同温度梯度及凝固速率下的枝晶竞争生长以及三维枝......
