An alloy based on aluminum with a certain amount of other alloying elements added is one of the light metal materials. In addition to the general properties of aluminum, aluminum alloys also have some specific properties of alloys due to the different types and quantities of added alloying elements. The density of aluminum alloy is 2.63~2.85g/cm3, it has high strength (σb is 110~650MPa), the specific strength is close to high alloy steel, the specific stiffness exceeds steel, it has good casting performance and plastic processing performance, and good electrical conductivity , thermal conductivity, good corrosion resistance and weldability, can be used as structural materials, and are widely used in aerospace, aviation, transportation, construction, electromechanical, light weight and daily necessities