Aluminum alloys for automobiles mainly include four categories: casting, rolling, extrusion and forging. Among them, cast aluminum alloys are mainly used for automobile engine blocks, cylinder heads, clutch housings, bumpers, wheels, engine brackets and other parts; Rolled aluminum sheets and foils are mainly used for body panels, door skins, cooling systems, battery shells, battery foils, etc.; extruded profiles are mainly used for anti-collision beams, suspension parts, various brackets, battery trays, etc.; forged parts are mainly used for For wheels, bumpers, crankshafts, etc.
In recent years, the trend of automobile lightweighting has been obvious. The proportion of cast aluminum alloys has gradually decreased, while rolled aluminum has gradually increased. The proportion of use in important parts such as body structures has increased significantly, especially in the power systems and body structures of new energy vehicles and pure electric vehicles. pieces etc. Judging from the types of aluminum materials, the proportion of aluminum used in traditional die-casting has decreased, while the proportion of rolled plates, strips, foils, and extruded profiles has increased relatively.