C-Mn钢热连轧再结晶模型的适用性研究

Investigation on Applicability Assessment of Recrystallization Models of C-Mn Steel during Hot Rolling

归纳了现有典型的多个C-Mn钢奥氏体再结晶过程的物理冶金模型,并采用2组模拟热连轧变形参数,对各模型进行了评价。对于再结晶模型,针对所设定的变形条件,得出可用于计算再结晶的模型有J.J.Jonas&Hodgson模型、Sellars模型、Yada模型和Saito模型。对可用于计算再结晶的模型在变形过程中每道次的再结晶情况及晶粒尺寸的变化情况进行了详细分析,得出J.J.Jonas&Hodgson的模型适用性较好。对于流变应力的模型,在相同变形条件下,Misaka模型和J.J.Jonas&Hodgson模型的结果较接近,而志田茂模型的结果与以上两个模型相差较大。因为缺少工业现场的数据作比较,对模型的工业适用性尚不能确定。

The available recrystallization models of C - Mn steels during hot rolling were reviewed and assessed under two different rolling schedules.As for the recrystallization models, J .J.Jonas ＆ Hodgson model, Sellars model, Yada model and Saito model are suitable for the given deformation conditions. By analyzing reerystaUization and grain evolution of every pass, it was found that J.J.Jonas ＆ Hodgson model is more suitable.As for the flow stress mod- els, the results of Misaka model and J .J.Jonas ＆ Hodgson model are similar, and the result of Shida Shigeru model differs apparently from that of Misaka model and J.J.Jonas ＆ Hodgson model. It is hard to completely determine the industrial applicability of the models due to the lack of plant data.