In addition to the general characteristics of aluminum, aluminum alloys have some specific characteristics 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 that of high alloy steel, the specific stiffness is higher than that of 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, has a wide range of applications in aerospace, aviation, transportation, construction, electromechanical, light and daily necessities.
Aluminum alloys are divided into deformed aluminum alloys and cast aluminum alloys according to their composition and processing methods. Wrought aluminum alloy is made by first melting and casting alloy ingredients into billets, and then plastic deformation processing, through rolling, extrusion, stretching, forging and other methods to make various plastic processing products. Casting aluminum alloy is a blank that is directly cast into various parts using sand molds, iron molds, investment molds, and die-casting methods after smelting ingredients.