The heat treatment processes of aluminum die casting mold mainly include the following, and each process has an important impact on the performance and life of the mold.
One of the heat treatment processes of aluminum die casting mold is annealing. Annealing is the process of heating the mold to a certain temperature, keeping it warm for a period of time, and then slowly cooling it. This process can stabilize the mold size, reduce deformation, and eliminate the internal stress of the mold, thereby increasing its plasticity.
Solution treatment is another important heat treatment process. In this process, the mold is heated to the highest possible temperature, close to the melting point of the eutectic, and kept for a long enough time, and then quickly cooled. This can maximize the dissolution of strengthening components, improve the strength and plasticity of the mold, and improve its corrosion resistance.
Aging treatment is usually carried out immediately after solution treatment. Aging is to heat the mold after solution treatment to a certain temperature, keep it warm for a certain period of time, and then slowly cool it to room temperature in the air. This process can decompose the supersaturated solid solution and restore the lattice of the aluminum alloy matrix to a relatively stable state, thereby further improving the performance of the mold.
In addition to the above three basic processes, hot and cold cycle treatment is also an effective method for heat treatment of aluminum die casting mold. Through multiple heating and cooling, hot and cold cycle treatment can stabilize the size of the mold and improve its anti-deformation ability, which is particularly suitable for the manufacture of precision parts.
During the heat treatment process, the control of parameters such as temperature, time and cooling rate is crucial. These parameters directly affect the effect of heat treatment, such as the hardness, strength and toughness of the mold. Therefore, these parameters need to be strictly controlled during heat treatment to ensure the treatment effect.
It is worth noting that the shape of aluminum die casting mold is usually more complex and the wall thickness varies greatly. During the heating and cooling process, the mold is prone to deformation and difficult to correct. Therefore, the heating and quenching speeds need to be properly adjusted during heat treatment to reduce deformation and increase the yield rate.
The heat treatment process of aluminum die casting mold includes annealing, solution treatment, aging treatment and hot and cold cycle treatment. These processes have their own characteristics and work together to improve the performance and life of the mold. In practical applications, it is necessary to select a suitable heat treatment process according to the specific conditions and requirements of the mold.
