中文摘要：

通过热压缩实验研究了21Cr-11Ni-N-RE节镍型奥氏体耐热钢的热力学行为和微观组织演变过程。通过对实验数据的回归分析,得到实验钢热变形激活能为451 k J/mol,应力指数为5.12。建立了热变形方程,确定了最大变形抗力和动态再结晶临界应变预测模型。通过对微观组织演变过程的分析,得到了实验钢获得均匀细小的完全动态再结晶组织的热变形条件为1150℃和10 s-1。

英文摘要：

The hot mechanical behavior and the microstructure evolution process of 21Cr-11Ni-N-RE lean nickel anstenitic heat-resistant steel were investigated by hot compression test. Through the regression analysis of experimental data, it is obtained that the deformation activation energy and stress index are 45 1 kJ/mol and 5.12, respectively. Hot deformation equation was established. The prediction models of the maximum deformation resistance and dynamic recrystallization critical strain were determined. Through the analysis of microstructure evolution process, it is obtained that the hot deformation c onditions in which the full dynamic recrystaUization microstructure with uniform and fine can be obtained is 1150℃ and 10 s^-1.