High vacuum die casting process as a new techniques and die casting aluminum alloy with high strength and ductility as a new materials are increasingly used to manufacture automobile parts due to tightly lightweight required in developed countries.The hydrogen content in parts can be decreased to 1

3

mL/100 g due to the vacuum degree up to 91

9

6 kPa in mould cavity in high vacuum die casting process

so the strength and ductility of parts can be improved by heat treatment.Aluminum alloy with high strength and ductility is mainly Al-Si-Mg series alloy

whose mechanical properties is improved by solid solution strengthening of Mg in alloy.The present developing methods to high vacuum die casting process are mainly Vacural method and MFT method

in which MFT method is more suitable for small-scale die casting plants.