采用有限元软件ProCAST模拟TiAl基合金液在金属型真空吸铸成形铸造工艺中的充型凝固过程,分析在充型凝固过程中产生缺陷的原因,并进行了相关的实验验证。在模拟过程中发现铸件中确实存在模拟预测的缺陷,且缺陷主要集中在叶片隼部,在叶身部位出现少量的缩松缺陷,模拟和实际相吻合。
The filling process and solidification of TiAl based alloy blade by suction casting was studied via numerical simulation.The shrinkage defect of TiAl based alloy blade casting was predicted using FEM software ProCAST.The results indicate the cold shut will be decreased with the increase of graphite suction opening diameter and the pouring temperature.With the decrease of the coefficient of heat transfer,the cold shut is reduced.The TiAl blades are obtained by this method.The simulated result tallies well with the actual cast experiment,and lays down a foundation for improving the cast technology of the TiAl based alloy casting.