Various new technologies for surface treatment of die-c […]
Various new technologies for surface treatment of die-casting molds are emerging, but in general they can be divided into the following three categories:
(1) Improvement techniques of conventional heat treatment processes;
(2) Surface modification technology, including surface thermal diffusion treatment, surface phase transformation strengthening, and electric spark strengthening technology;
(3) Coating technology, including electroless plating.
Die casting molds are a large class in the mold. With the rapid development of China's automobile and motorcycle industry, the die-casting industry has ushered in a new era of development. At the same time, it also puts forward higher requirements on the comprehensive mechanical properties and life of die-casting molds. Luo Baihui, secretary-general of the International Model Association, believes that it is still difficult to meet the ever-increasing use performance requirements by relying only on new mold materials. Various surface treatment techniques must be applied to the surface treatment of die-casting molds to achieve high efficiency in die-casting molds. High precision and long life requirements. In various molds, the working conditions of the die-casting mold are more demanding. Pressure casting is to make the molten metal fill the mold cavity under high pressure and high speed and die-casting. It is repeatedly in contact with the hot metal during the working process. Therefore, the die-casting mold is required to have high thermal fatigue resistance, thermal conductivity wear resistance and corrosion resistance. , impact toughness, red hardness, good release properties, etc. Therefore, the surface treatment technology for the die-casting mold is highly demanded.