Comparative study of the cavity pressure of magnesium alloy and aluminium alloy during die casting process

The pressure changes in the cavity of ADC12 and AZ91D die castings under the same processing technology have been measured. From liquid phase to solid phase, the pressure curves of ADC12 and AZ91D are divided into six sections and the characteristic parameters were defined based on the experimental results. The results show that the filling pressure and filling time as well as the trend of pressure change of these two alloys are almost the same. The pressure holding time and the effective holding time of the transferred pressure of ADC12 are much higher than those of AZ91D. For different measured points, the maximum transferred pressures of ADC12 are close to each other and those of AZ91D show a great difference. The difference of pressure curves between the two alloys is related to the solidification characteristic of the liquid metal and the mechanical properties of the alloys.