Deformation and Densification Laws of Powder Cold Forging

被引：0
|
作者：
余世浩
机构：
[1] China
[2] Wuhan 430070
[3] College of Material Science and Engineering Wuhan University of Technology
来源：
Journal of Wuhan University of Technology(Materials Science Edition) | 2007年 / 01期
基金：
中国国家自然科学基金;
关键词：
powder cold-forging; fracture limit strain criterion; deformation law; densification mechanism;
D O I：
暂无
中图分类号：
TF124.38 [];
学科分类号：
080502 ;
摘要：
The deformation and densification laws of preform upsetting and closed-die forging were researched based on experimental results of cold forging of deoxidized Fe powder sintering porous material under different initial conditions such as friction factor, ratio between height and diameter and relative density. The fracture limit criterion for powder cold-forging upsetting and the limit strain curve were achieved. The effect of friction factor, ratio between height and diameter and relative density on fracture strain limitation was emphatically analyzed. The limit process parameter curves for the deformation of upsetting were also confirmed. Laws of deformation, densification and density distribution for closed-die forging of powder perform during cold-forging were further analyzed and discussed with the help of experimental phase analysis. As a result, this experiment established theoretical foundations for the design of preform and die as well as optimization of technological process parameters.
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页码：17 / 21
页数：5
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