6061 alloy as the main alloying elements of magnesium and silicon, with moderate strength, good corrosion resistance, weldability, oxidation is better. Widely used requires a certain strength and high corrosion resistance of various industrial structures, such as the manufacture of trucks, tower buildings, ships, trams, railway vehicles, furniture, aerospace fixtures, electrical fixtures, communications, it is also widely used in automated machinery parts, precision machining, mold manufacturing, electronics and precision instruments, SMT, PC board solder vehicles and so on.