Abstract:The samples of the new diecasting parts of Mg-9Al-1Zn-05Ce were diecasted, and the mechanical properties and corrosion resistance were tested and analyzed. The results show that with the increase of pouring temperature and the speed of injection, the tensile strength and yield strength of the samples first increase and then decrease, and the corrosion potential shifts gradually after the positive shift, and the elongation changes little. Both mechanical performance and corrosion resistance are first improved and then decreased. Compared with the casting temperature of 620 ℃, the tensile strength and yield strength at the casting temperature of 650 ℃ respectively increase by 1308% and 2378%, the elongation after fracture decreases by 1%, and the corrosion potential is shifted by 43 mV. Compared with diecasting samples at the injection speed of 1 m/s, the tensile strength and yield strength at the die casting speed of 3 m/s increase by 1120% and 1645% respectively, and the elongation after fracture decreases by 08%. The corrosion potential is shifted by 31 mV. The diecasting process parameters of the new diecasting parts of Mg-9Al-1Zn-05Ce are optimized to be 650 ℃ initial forging temperature and 3 m/s injection speed.