大型钢锭凝固模拟计算中发热剂的优化处理

The Treatment of Exothermic Compound in Solidification Simulation of a Large Ingot Casting

在大型钢锭的数值模拟计算过程中,发热剂模型不随钢锭收缩而变化,使数值模拟的温度场、缩孔缩松预测产生偏差。针对这一问题,以Pro CAST为计算软件,建立可替代发热剂模型的数学模型,即钢锭的体积表面热,并以96 t金属模钢锭的传热凝固过程为研究对象,设置体积表面热参数与发热剂模型进行对比,得到完全凝固时间与实际情况相符的参数数据。

In the process of numerical simulation of large ingots,the exothermic compound model does not change with the shrinkage of ingots,which makes the prediction of temperature field and shrinkage porosity deviate.In order to solve this problem,a mathematical model,that is,the volume surface heat of the ingot,which can replace the exothermic compound model has been established by using ProCAST as the calculation software,and the heat transfer and solidification process of the 96 t metal mold steel ingot has been taken as the research object. The volume surface thermal parameters have been compared with the exothermic compound model,and the parameter data which make the complete solidification time consistent with that in the actual situation have been obtained.