Research on thixoforging of magazine plate of AZ91D magnesium alloy

In order to know the influence of technological parameters on microstructure and mechanical properties of components thixoforged, the thixoforging process of magazine plates of AZ91D magnesium alloy were investigated by tensile machine and microscopy. Semi-solid billets were prepared by common SIMA method and new SIMA method, respectively. The results show that pressure has a great influence on the filling ability of the semi-solid billet. When the pressure is 500 kN, semi-solid billet can't fill the die's cavity completely. When the pressure is 2000 kN, semi-solid billet can fill the die's cavity completely. Optimal mechanical properties can be obtained successfully when the technological parameters such as pressure of 200 kN, die preheating temperature of 450°C, holding time of 20 min at 545°C, are selected. Comparing with common SIMA, mechanical properties of magazine plates at room temperature and high temperature at 100% are enhanced.