60Si2Mn钢的动态再结晶动力学模型  

Dynamic recrystallization kinetic model of 60Si2Mn steel

作　　者：曹成龙 陈庆安 黄素霞[1,2] 申文飞 李河宗[1,2] 曹晶晶 李子豪 Cao Chenglong;Chen Qing’an;Huang Suxia;Shen Wenfei;Li Hezong;Cao Jingjing;Li Zihao(School of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan Hebei 056038,China;Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province,Hebei University of Engineering,Handan Hebei 056038,China)

机构地区：[1]河北工程大学机械与装备工程学院,河北邯郸056038 [2]河北工程大学、河北省智能工业装备技术重点实验室,河北邯郸056038

出　　处：《金属热处理》2024年第6期232-238,共7页Heat Treatment of Metals

基　　金：河北省自然科学基金(E2022402102);邯郸市科学技术研究与发展计划(21422075242)。

摘　　要：研究了60Si2Mn弹簧钢在变形温度730~1000℃、应变速率0.01~5 s^(-1)下的动态再结晶(DRX)行为。通过对试验钢单道次热压缩试验的数据处理,得到了流变应力曲线;借助加工硬化率拟合出各热变形条件下的动态回复曲线,建立动态再结晶动力学模型,根据模型预测出不同热变形参数下的动态再结晶体积分数。结果表明,弹簧钢的动态再结晶行为对变形温度和应变速率敏感。随着应变速率的降低或变形温度的升高,动态再结晶软化的临界应变降低,DRX的体积分数增加。预测值与试验值吻合良好,验证了动态再结晶动力学模型对弹簧钢的适用性。Dynamic recrystallization(DRX)behavior of 60Si2Mn spring steel at deformation temperature of 730⁃1000℃and strain rate of 0.01⁃5 s^(-1)was studied.The flow stress curves were obtained by processing the data of single⁃pass hot compression test of the tested steel.The dynamic recovery curves under different hot deformation conditions were fitted by the work hardening rate,and the dynamic recrystallization kinetic model was established.According to the model,the dynamic recrystallization volume fraction under different hot deformation parameters was predicted.The results show that the dynamic recrystallization behavior of the spring steel is sensitive to deformation temperature and strain rate.With the decrease of strain rate or the increase of deformation temperature,the critical strain of dynamic recrystallization softening decreases and the volume fraction of DRX increases.The predicted values are in good agreement with the experimental values,which verifies the applicability of the dynamic recrystallization kinetic model established for the spring steel.

关 键 词：60SI2MN弹簧钢 热压缩 动态再结晶 动力学模型 

分 类 号：TG111.7[金属学及工艺—物理冶金]