Numerical Simulation and Analysis on Casting Process of TiAl Alloy
The casting process of TiAl turbocharger with gravity casting,centrifugal casting and vacuum suction casting were comparatively studied by numerical simulation.Laws of cavity-filling and the solidification characteristics of molten TiAl in the turbocharger mold were analyzed.The results show that grivity casting and centrifugal casting are prone to produce defects such as misrun,shrinkage porosity,shrinkage cavity.The filling ability of TiAl molten can be improved by the vacuum suction casting process and its stationary filling process can be well feed,which is a ideal forming method for small TiAl casting.