Aluminum alloy refers to a metal material made by taking aluminum as the main component and adding a certain amount of alloy elements through the alloying process. Aluminum alloy has relatively high strength, hardness and corrosion resistance, as well as good machinability and plasticity. The main constituent element of aluminum alloy is aluminum, and it also contains other elements such as copper, zinc, magnesium, manganese, silicon, etc. In different aluminum alloys, the content and proportion of elements are different, so they have different properties and characteristics.