摘要
采用圆柱试样在Gleeble-1500D热模拟试验机上进行高温压缩变形模拟试验,变形温度800～1100℃,应变速率为0.005～1 s-1,研究了5Cr21Mn9Ni4N(21-4N)气门钢的高温塑性变形行为。结果表明,在21-4N气门钢高温压缩变形时,应变速率和变形温度的变化强烈影响着合金的流动应力,它随变形速率的升高而增大,随变形温度的升高而降低;高温变形条件下流动应力σ、应变速率觶ε和变形温度T之间满足一定关系,它可为电镦工艺参数的优化和数值模拟提供依据。
The high temperature flow behavior of 5Cr21Mn9Ni4N（21-4N） valve steel was investigated by isothermal compression testing of cylindrical specimens with Gleeble-1500D thermal simulation testing machine.The results show that the flow stress of 21-4N steel is controlled by strain rate and deformation temperature： the flow stress increases with the decrease of deformation temperature and the increase of strain rate.The flow stress equation during high temperature compression can be obtained.The equation can provide a necessary basis for the optimization of process parameters and numerical simulation.
出处
《热加工工艺》
CSCD
北大核心
2012年第2期46-48,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(50975050)
