Constitutive Equation Models of Hot-Compressed T122 Heat Resistant Steel

作     者：CAO Jin-rong LIU Zheng-dong CHENG Shi-chang YANG Gang XIE Jian-xin 

作者机构：Tianjin Pipe Group Corporation Technical CenterTianjin 300301China Central Iron and Steel Research InstituteBeijing 100081China University of Science and Technology BeijingBeijing 100083China 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2012年第19卷第6期

页      面：53-58页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080104[工学-工程力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Sponsored by National High-Tech Research and Development Program (863Program) of China (2003AA331060) 

主　　题：hot deformation dislocation constitutive equation T122 heat resistant steel 

摘      要：Based on dislocation reaction theory and Avrami equation, a constitutive equation model was developed to describe dynamic recovery and dynamic recrystallization during hot deformation of T122 heat resistant steel, which have taken the effect of dynamic strain aging into account. Uniaxial hot compression test had been carried out over a wide range of strain rate （0.01 to 10 s-1 ） and temperature （900 to 1 200 ~C） with the help of Gleeble 3500. Obtained experimental data was applied to determine the material parameters in proposed constitutive equations of T122 steel, by using the non-linear least square regress optimization method. The calculated constitutive equations are quantita- tively in good agreement with experimentally measured curves and microstructure observation. It shows that propose constitutive equation T122 steel is able to be used to predict flow stress of T122 steel during hot deformation in aus- tenite temperature scope.