基于ProCAST软件对某钛合金喷管铸件充型及凝固过程进行了数值模拟,结果显示铸件壁内部存在着大量的缩孔,这与实际浇注结果相符合。通过模拟,在喷管壁外侧设置冒口和改变型壳预热温度,改进后的方案有效地减少了缩孔的数量,改善了缺陷情况。 Based on ProCAST software, the casting and solidification process of a titanium alloy nozzle casting are numerically simulated. The results show that a large number of shrinkage cavities exist inside the casting wall, which is consistent with the actual casting results. Through the simulation, the riser is set on the outside of the nozzle wall and the shell preheating temperature is changed. The improved scheme effectively reduces the amount of shrinkage cavities and improves the defects.