Fe-0.1C-5Mn中锰钢热变形行为研究  

Study on Hot Deformation Behavior of Fe-0.1C5Mn Medium Manganese Steel

作　　者：岑琼瑛 张本道 严子杰 张梅[1] CEN Qiongying;ZHANG Bendao;YAN Zijie;ZHANG Mei(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《上海金属》2023年第5期34-40,共7页Shanghai Metals

基　　金：国家重点研发计划(2017YFB0304402)。

摘　　要：通过Gleeble-3500热机械模拟机研究了Fe-0.1C-5Mn中锰钢在950~1150℃变形温度、0.001~1 s^(-1)应变速率下的高温变形行为。根据单道次热压缩的真应力-真应变曲线,分析了变形条件对流变应力的影响,发现高温和低应变速率有利于动态再结晶的发生。引入Zener-Hollomon参数,建立本构方程,得到钢的热变形激活能为256.317 kJ/mol。通过对试验数据的拟合,建立了中锰钢动态回复和动态再结晶的分段流变应力模型,结果表明:模型预测值与试验值吻合较好,证明了所建模型的可靠性。High temperature deformation behavior of Fe-0.1C-5Mn medium manganese steel at temperatures ranging from 950 to 1150℃and at strain rates ranging from 0.001 to 1 s^(-1)was studied by a Gleeble-3500 thermomechanical simulator.According to the true stress-true strain curve of single-pass hot compression,the effect of deformation conditions on flow stress was analyzed,and it was found that high temperature and low strain rate were conducive to the occurrence of dynamic recrystallization.The Zener-Hollomon parameter was introduced to establish the constitutive equation,and the hot deformation activation energy of the experimental steel was 256.317 kJ/mol.By fitting the experimental data,a piecewise flow stress model for dynamic recovery and dynamic recrystallization of medium manganese steel was established.The results showed that the predicted values of the model were in good agreement with the experimental values,which proved the reliability of the model.

关 键 词：Fe-0. 1C-5Mn 中锰钢 热变形 本构方程 流变应力模型 动态再结晶 

分 类 号：TG142.71[一般工业技术—材料科学与工程]