SEMISOLID DIE-CASTING ALUMINUM ALLOY AND METHOD FOR PREPARING SEMISOLID DIE-CASTING ALUMINUM ALLOY C

Provided are a semisolid die-casting aluminum alloy and a method for preparing semisolid die-casting aluminum alloy castings, wherein, the semisolid die-casting aluminum alloy contains alloy elements, unavoidable impurities, and the balance of aluminum elements; on the basis of the total weight of the semisolid die-casting aluminum alloy, the alloying elements include : 7.5 wt% to 9.5 wt% of Si, 3.5 wt% to 4.8 wt% of Cu, 0.5 wt% to 0.75 wt% of Mn, 0.01 wt% to 0.5 wt% of Ti and 0.01 wt% to 0.35 wt% of rare earth elements.