17-4PH钢热塑性变形本构方程的研究  

Research on Constitutive Equation of 17-4PH Steel During Thermo-plastic Deformation

作　　者：叶义根 傅建[1] 谢彬[2] 彭必友[1] 刘挺[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]东方汽轮机有限公司制造技术处,四川德阳618000

出　　处：《热加工工艺》2013年第24期99-102,106,共5页Hot Working Technology

基　　金：四川省教育厅重点项目(11ZA282);西华大学"流体及动力机械"省部共建教育部重点实验室资助项目(SBZDPY-11-16)

摘　　要：利用热压缩试验研究了17-4PH钢在不同变形温度和变形速率下的曲线特征,并结合动态回复与动态再结晶理论探讨了曲线特征所反映的试样内部变化。借助数理统计法建立了一种包括应变、应变速率和温度在内的适合17-4PH钢高温塑性变形的应力-应变本构方程。The constitutive equation of metal material thermoplastic deformation describes the dependency between flow stress and strain, strain rate and deformation temperature on hot working condition. The stress-strain curve characteristics of 17-4PH steel were investigated by thermal compression experiment under different deformation temperature and deformation rate. The sample inner changes which can reflect the curve characteristics were discussed using dynamic recovery and dynamic recrystallization theory. At the same time, with the aid of mathematical statistics method, a high temperature plastic deformation constitutive equation including strain, strain-rate and temperature, which can fit 17-4PH steel, was established.

关 键 词：17-4PH钢 热塑性变形 本构方程 

分 类 号：TG113.253[金属学及工艺—物理冶金]