P20钢大型塑料模具几种淬火工艺的三维温度与组织模拟

3D Temperature and Microstructure Modelling of Large-scale P20 Steel Mould Quenching in Different Processes

通过建立合适的三维有限元模型 ,研究了P2 0钢大型模具按 3种工艺进行淬火时的温度组织变化。模拟结果表明 ,工艺a造成了模块内过大的温度梯度 ;工艺b通过多次空冷加水淬使工件内的温度梯度下降 ;而工艺c使已转变的马氏体和贝氏体产生自回火。

Based on the three dimensional Finite Element Method (FEM),the temperature and microstructure variations of large scale P20 steel mould during quenching in 3 different processes were studied.The results show that significant temperature gradient exists during quenching in process a.The temperature gradient is less steep during quenching in process b by alternative water and air cooling.And the transformed martensite and bainite are self tempered by process c.The calculated temperature is in agreement with the measured one.