The four basic processes in the aluminum die casting industry are annealing, normalizing, quenching and tempering. These four processes are called the "four fires" in die casting. In the die casting process, the relationship between quenching and tempering is very closely, both are indispensable.

It is understood that annealing is to heat the workpiece. When heated to an appropriate temperature, the die-casting is slowly cooled according to the different materials used, and the internal structure of the metal has reached a near-equilibrium state. Normalizing is to heat the workpiece to a suitable temperature and then cool it in the air. It is mainly used to improve the cutting performance of the material, and it can also be used to finish die-casting for some parts that do not require high requirements. Quenching is to heat and heat the workpiece, and then rapidly cool it in a quenching medium such as water, or other inorganic salt solutions. After this process, the produced steel parts will become hard and brittle. In order to reduce the brittleness of steel parts, the quenched steel parts can be placed at a temperature below 650 degrees Celsius and higher than normal temperature for a long time, and then cooled, which is called tempering.

Application of aluminum die castings Aluminum materials and aluminum alloys have good fluidity and plasticity, so various complex and difficult die castings can be made. Castings made of aluminum alloys and metal aluminum have high precision and surface finish. , which greatly reduces the mechanical processing of castings, greatly reduces labor intensity, and saves electricity and metal materials. Because of its high internal and external quality, aluminum die castings are widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, transmission machinery manufacturing, precision instruments, landscaping, power construction, and other industries. , become the new favorite of die casting industry.