The four basic processes of aluminum die casting processing are annealing, quenching, and tempering. These four processes are called "four fires" in die casting, which are related to The relationship between die casting, quenching and tempering is very close, and the two are indispensable.

Annealing: It is to heat the workpiece. When heated to an appropriate temperature, the die-casting is slowly cooled according to the choice of material, and the condition that the internal structure of the metal is close to equilibrium has been reached.

Quenching: Heating the workpiece to a suitable temperature and then cooling it in the air, it is mainly used to improve the cutting function of the material, and it can also be used for some parts that must not be made high. Completion of die castings.

Quenching: Under the combined action of heating and heat preservation in the aluminum die casting factory, the workpiece is rapidly cooled in water, or through quenching and cooling substances such as other carbonate solutions. Process, the resulting steel may become hard, but also make the steel brittle. In order to reduce the brittleness of steel parts.

Temper. The quenched steel is placed for a long time at a temperature higher than room temperature below 650°C, and then cooled.