Among all mold failure factors, mold material and heat treatment account for about 70%, becoming the main factor affecting mold life.

Therefore, in the entire design and manufacturing process of the mold, the selection of mold materials and whether the heat treatment process is appropriate is particularly important.

The stamping factory puts forward the requirements for the material of the working parts of the stamping die: The stamping die must bear the load of impact, vibration, friction, high pressure, tension, bending and torsion when working, and even work at a higher temperature ( Such as cold extrusion), the working conditions are complicated, and phenomena such as wear, fatigue, fracture, and deformation are prone to occur. Therefore, the requirements for the materials of mold working parts are higher than that of ordinary parts. Due to the different working conditions of various stamping dies, the requirements for the materials of the working parts of the dies are also different.

1. The material requirements of the blanking die require high wear resistance and hardness for the working parts of the thin plate blanking die, while the thick plate blanking die requires high wear resistance and compression yield point. To prevent the mold from breaking or chipping, it should also have high fracture resistance, high bending strength and toughness. 2. The requirements of drawing die materials require that the material of the working parts of the die has good anti-adhesion (anti-seizure), high wear resistance and hardness, certain strength and toughness, and good cutting performance, and it is deformed during heat treatment. To be small. 3. The requirements of cold extrusion die materials require that the working parts of the die have high strength, hardness, and high wear resistance. In order to avoid impact breakage, a certain degree of toughness is also required. Due to the large temperature rise during extrusion, it should also have a certain degree of thermal fatigue resistance and thermal hardness. Reasonable selection of mold materials and implementation of the correct heat treatment process according to the requirements of the material of the working parts of the stamping mold are the keys to ensuring the life of the mold. For molds with different purposes, comprehensively consider factors such as their working conditions, stress conditions and properties of the processed materials, production batches and productivity, and focus on the various properties of the above requirements, and then make the steel type and heat treatment process s Choice.