Abstract: Suction investment casting processes of low-pressure turbine blades with high TiAl alloy were simulated by Procast software. Comparative results had shown that the surface of suction casting blade was more complete than that of gravity casting one. In gravity casting process, molten metal filled the thinnest trailing edge at last, resulting in the generation of misrun defects. Furthermore, the shrinkage porosity and crack defects of gravity casting were much more and dispersive. The internal and external quality of suction casting was much better than that of gravity casting.

Keywords: FEM simulation; ProCAST software; gravity and suction casting;