文档介绍：热加工工艺000207
热加工工艺
HOT WORKING TECHNOLOGY
2000 -20
球墨铸铁高温弹塑性力学性能的实验研究
商全义弓金霞
摘要: 给出了球墨铸铁(QT500—7)加载-卸载-二次加载特性曲线,结果表
明,加载-卸载-二次加载过程的应力-应变关系基本满足Prantle假设。测定了18℃~
1000℃应力-应变关系和各温度下的抗拉强度、屈服强度、弹性模量、剪切模量、泊松
比、应变强化率以及它们随温度的变化关系,为进行该种材料的弹塑性热应力计算机
数值模拟提供了必须的基础数据;本文的实验结果表明,弹塑性力学的理论和假设基
本适用于铁素体-球光体基体的球墨铸铁材料。
关键词: 球墨铸铁; 高温; 弹塑性力学性能; 实验研究
中图分类号: 文献标识码:A 文章编号:1001-3814(2000)02-
0019-02
Experimental Research on Elastic-Plastic Mechanical Properties of
Spheroidal Graphite Cast Iron at High Termperature
SHANG Quan-yi GONG Jin-xia
(Department of Mechanical Engineering,Zhengzhou Textile institute)
Abstract: It was given the curve of loading-unloandin g-secondary loading of
spheroidal graphite cast iron,and it showed that the rel ation of stress-strain agreed with
prantle's hypothesis in the period of loadin g-unloanding-secondary
measured the stress-strain curve and th e relation of limit strength,yield strength,Yong's
modulus,shear modulus,Poisson 's ratio and strain hardening rate of this materal with
temperature in the range of 18℃~1000℃,it provides the data necessary puter
simulation of therm al elastic-plastic experimental result in this paper shows that
the theory of elastic-plastic mechanics can be basically applied to spheroidal grap hite cast
iron with the matrix of ferritic-pearlitic.
Key word