粉末温压成形过程中的力学行为
The Mechanical Behavior of Powder Warm Compaction Process
摘 要
利用MSC/Marc有限元仿真软件,采用基于更新拉格朗日方法的热-机耦合分析方法,模拟了铁基粉末温压工艺过程,研究了压制成形过程中的力学行为.结果表明：对于圆柱形粉末冶金制品,在获得同等压坯密度的情况下,随着润滑条件的改善,压制力、侧压力、脱模力均有所降低,同时压坯应力分布更加均匀, 压坯边角处应力集中现象有所缓解,这对于提高压坯性能特别是力学性能十分有利.
密度
有限元
温压成形
powder
density
FE
warm compaction
Abstract
The Fe-based powder warm compaction process was simulated by the finite element analysis software which is MSC/MARC.The thermal mechanically coupled analysis method based on the updated Lagrangian Method was applied to simulate this process,the mechanical behavior of warm compaction process was scudied.The results indicate that for cylindrical powder metallurgic products,pressing pressure,side pressure and ejecting force decrease with improving lubrication condition in the case of obtaining equivalent green density.At the same time distribution of green stress is more even,the stress concentration phenomenon of green edge is relaxed,this is favorable for improving green properties,especially mechanical properties.
中图分类号 TG376
所属栏目
基金项目 安徽省“十五”二期科技攻关项目(040020392);合肥市重点科技项目(20051044)
收稿日期 2006/10/18
修改稿日期 2007/3/7
网络出版日期
作者单位点击查看
备注王德广(1977-),男,山东泰安人,博士研究生.
引用该论文: WANG De-guang,ZHOU Rui-ting,XIE Ting,JIAO Ming-hua,YU Jian-wei,YIN Yan-guo,WU Yu-cheng. The Mechanical Behavior of Powder Warm Compaction Process[J]. Materials for mechancial engineering, 2007, 31(5): 66～68
王德广,周瑞庭,解挺,焦明华,俞建卫,尹延国,吴玉程. 粉末温压成形过程中的力学行为[J]. 机械工程材料, 2007, 31(5): 66～68
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参考文献
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【5】王德广,邓小民.芯棒位置对管材内径尺寸精度影响的有限元模拟[J].重型机械,2005(1):51-54,57.
【6】王德广,邓小民.高精度管材拉拔过程计算机模拟研究[J].重型机械,2006(3):35-39.
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【8】Khoei A R,Iranfar S.3D numerical simulation of elastic-plastic behaviour in powder compaction process using a quasi-nonlinear technique[J].Journal of Materials Processing Technology,2003(143/144):886-890.
【9】Khoei Amir R,Lewis Roland W.Finite element simulation for dynamic large elastic-plastic deformation in metal powder forming[J].Finite Elements in Analysis and Design,1998,30:335-352.
【10】Ariffin A K,Mujibur Md,Muhamd N,et al.Themal-mechanical mode of warm powder compaction process[J].Journal of Materials Technology,2001,116:67-71.
【11】Shima S,Oyane M.Plasticity theory for porous metals[J].Int J Mech Sci,1976,118:285-2921.
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【13】陈火红.Marc有限元实例分析教程[M].北京:机械工业出版社,2002.
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【15】黄培云.粉末冶金原理(第2版)[M].北京:冶金工业出版社,1997.
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