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采用Jmatpro软件对改性中锰钢的合金相图和热物性参数进行分析计算,确定了铸造初始温度。根据衬板的材料及形状,确定了倾斜浇注+波浪形冷铁的铸造工艺,建立凝固过程温度场的数学模型、几何模型及有限元模型。采用有限元仿真软件ProCAST对铸造过程温度场进行了模拟仿真计算。结果表明,在共晶转变阶段,共晶转变产生的热量不能及时顺畅向外散失,温度降低,曲线逐渐趋于平缓。通过比较5个关键点的速度冷却曲线发现,铸件中心位置首先凝固,两端随后凝固,达到了顺序凝固的预期目的,消除了缩孔、缩松缺陷。
The alloy phase diagram and thermophysical properties of the modified medium manganese steel were analyzed and calculated by Jmatpro software to determine the initial casting temperature. According to the material and shape of the liner, the casting technology of inclined pouring and corrugated chilled iron was determined, and the mathematical model, geometric model and finite element model of the temperature field in the solidification process were established. The finite element simulation software ProCAST was used to simulate the temperature field in the casting process. The results show that during the eutectic transformation phase, the heat generated by the eutectic transformation can not be smoothly dissipated in time and the temperature decreases, and the curve gradually tends to be gentle. By comparing the speed cooling curves of the five key points, it was found that the center of the casting solidified first and then solidified at both ends, which achieved the expected purpose of sequential solidification and eliminated the shrinkage cavity and shrinkage defects.