基于ProCAST的转子盘熔模铸造数值模拟研究

Numerical Simulation of Investment Casting of Rotor Disc Based on ProCAST

根据转子盘的结构特点,分析转子盘的浇注成形工艺,运用ProCAST有限元软件模拟两内浇道、两浇冒浇注过程中充型场和凝固场的变化规律,预测了转子盘缩松缩孔缺陷位置。结果表明,转子盘顶部法兰、底部法兰、筋条以及扇叶处均有缩松缩孔现象产生。进一步将浇注系统进行改进,经过模拟可知缩松缩孔缺陷明显降低,随后对改进方案设计正交试验,得出最优工艺参数,即浇注温度1 650℃,浇注速度309 mm/s,模壳预热温度960℃。最后模拟结果显示铸件内缩松缩孔缺陷完全消除。

According to the structural characteristics of the rotor disc, the casting process was analyzed. The Pro CAST s oftware was used to simulate the changing law of mold filling field and solidification field during the pouring process of two inner gates, two pouring runners and riser, and the locations of shrinkage cavity and porosity defects of the rotor disc were predicted. The results show that the top flange, bottom flange, ribs and fan blade of the rotor disk all have shrinkage and shrinkage holes. The gating system is further improved, and the simulation shows that the shrinkage and shrinkage holes are significantly reduced. After submitting the test, the optimal process parameters were obtained, the pouring temperature was 1 650 ℃, the pouring speed was 309 mm/s, and the mold shell preheating temperature was 960 ℃. The final simulation results show that the shrinkage porosity defects in the casting were completely eliminated.