一种节镍型奥氏体耐热钢热变形行为的研究  

Study on Hot Deformation Behavior of a Lean Nickel Austenitic Heat-resistant Steel

作　　者：薛红燕[1] 陈雷[1,2] 毛天桥 龙红军[1] 王建峰[1] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《热加工工艺》2015年第23期59-62,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51101136);河北省自然科学基金项目(E2012203013);河北省教育厅青年基金项目(QN2014107)

摘　　要：通过热压缩实验研究了21Cr^(-1)1Ni-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)。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.

关 键 词：热变形行为 峰值应力模型 临界应变模型 微观组织 

分 类 号：TG304[金属学及工艺—金属压力加工]