In order to investigate the effects of casting temperature and holding pressure on shrinkage and porosity and mechanical properties of ADC12 aluminum alloy castings,ProCAST software was used to simulate the filling and solidification process of squeezing casting.A fixed support part of an automobile engine was produced by indirect squeezing casting to obtain desirable mechanical properties.Through simulation analysis,mechanical properties testing and metallography observation,the satisfied process parameters were determined as follows:Casting temperature of 680 ℃,holding pressure of 150 MPa and mold temperature of 250 ℃.Moreover,the holding pressure plays a domi-nant role in eliminating shrinkage and porosity defects of castings,improving microstructure and enhancing the mechanical properties of castings.
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