In order to ensure that the die casting tool meets the requirements of use and meets the requirements of process performance, the materials in different parts of the die have different requirements, and the specific material selection principles are as follows:

(1) Requirements for materials in contact with liquid metal

The material in contact with liquid metal has the following requirements: ①. Has good malleability and machinability ②. At high temperatures, it has high red hardness, high temperature strength, hardness, tempering stability and impact toughness. It has good thermal conductivity and thermal fatigue resistance

(4) It has high wear resistance and corrosion resistance. (5) It has good hardenability and small heat treatment deformation rate.

(2) Requirements for materials used in sliding fit parts

The materials used in sliding fit parts have the following requirements :①. With a small amount of wear resistance and appropriate strength ②. Proper hardenability and small heat treatment deformation rate

(3) Mold and support plate material requirements

The materials used in the mold and supporting plate have the following requirements :①. Have sufficient strength and stiffness ②. Easy to cut