Hot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti

作     者：Fei GAO Fu-xiao YU Hai-tao LIU Zhen-yu LIU 

作者机构：School of Materials & MetallurgyNortheastern Unversity State Key Laboratory of Rolling and AutomationNortheastern University 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2015年第22卷第9期

页      面：827-836页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Sponsored by National Science and Technology Pillar Program during the Twelfth Five-year Plan Period of China(2012BAE04B02) National Natural Science Foundation of China(51271050) 

主　　题：17%Cr ferritic stainless steel hot deformation flow stress constitutive equation strain compensation 

摘      要：The hot deformation behavior of ultra purified 17% Cr ferritic stainless steel stabilized with Nb and Ti was investigated using axisymmetric hot compression tests on a thermomechanical *** deformation was carried out at the temperatures ranging from 700 to 1 100℃ and strain rates from 1to *** microstructure was investigated using electron backscattering *** effects of temperature and strain rate on deformation behavior were represented by Zener-Hollomon parameter in an exponent type *** effect of strain was incorporated in the constitutive equation by establishing polynomial relationship between the material constants and strain.A sixth order polynomial was suitable to represent the effect of *** modified constitutive equation considering the effect of strain was developed and could predict the flow stress throughout the deformation conditions except at800℃in 1s-1 and at 700℃in 5and *** the reliability of the modified constitutive equation was possibly ascribed to the increase in average Taylor factor at 800℃in 1s-1 and the increase in temperature at 700℃in 5and10s-1 during hot *** optimum window for improving product quality of the ferritic stainless steels was identified as hot rolling at a low finisher entry temperature of 700℃,which can be achieved in practical production.