中文摘要：

利用Gleeble-1500热模拟机对X20Cr13马氏体不锈钢进行等温热压缩实验,研究此材料在变形温度1173～1423 K、变形速率0.001～10 s-1条件下的热变形行为.通过五阶多项式拟合计算得出材料参数α和n,激活能Q和A作为应变的函数.基于Arhenius方程构建包含变形温度、应变速率和应变的X20Cr13马氏体不锈钢热变形的本构模型.通过相关系数和平均相对误差验证建立的X20Cr13马氏体不锈钢本构模型的有效性,其值分别为0.996和3.22％.

英文摘要：

Hot deformation behavior ofX20Cr13 martensitic stainless steel was investigated by conducting hot compression tests on Gleeble-1500D thermo-mechanical simulator at the temperature ranging from 1173 to 1423 K and the strain rate ranging from 0.001 to 10 s^-1. The material constants of a and n, activation energy Q and A were calculated as a function of strain by a fifth-order polynomial fit. Constitutive models incorporating deformation temperature, strain rate and strain were developed to model the hot deformation behavior of X20Cr13 martensitic stainless steel based on the Arrhenius equation. The predictable efficiency of the developed constitutive models of X20Cr13 martensitic stainless steel was analyzed by correlation coefficient and average absolute relative error which are 0.996 and 3.22%, respectively.