38MnVS6非调质钢棒材轧后冷却过程中的组织转变

Microstructure evolution of 38MnVS6 non-quenched steel bar during cooling process after hot rolling

以MSC.Marc有限元分析软件为平台,利用其二次开发功能,结合38Mn VS6非调质钢等温转变曲线,建立了38Mn VS6非调质钢棒材轧后冷却过程的有限元模型,实现了38Mn VS6非调质钢棒材轧后冷却过程温度和相变的耦合计算。通过模拟,得到了棒材轧后冷却过程温度和组织的分布和演变情况。计算得到的组织转变情况与实测结果吻合较好,这对优化38Mn VS6非调质钢棒材轧后冷却工艺参数有一定指导意义。

With the aid of finite element（ FE） software MSC. Marc and its subroutine system,a FE model of 38 Mn VS6 non-quenched steel cooling process after rolling was established on the basis of the isothermal transform diagram of 38 Mn VS6 non-quenched steel. The model couples the temperature and phase transformation in its calculation. The distribution and evolution of temperatures and microstructure were simulated. The simulated microstructure shows good agreement with the experimental ones. It is of certain significance for the optimization of38 Mn VS6 non-quenched steel cooling process parameters after rolling.