Stamping dies must bear loads such as shock, vibration, friction, high pressure and tensile, bending and torsion, and even work at higher temperatures (such as cold extrusion). The working conditions are complex and prone to wear, fatigue, fracture, and deformation And other phenomena. Therefore, the requirements for the material of the mold working parts are higher than that of ordinary parts. Due to the different working conditions of various stamping dies, the requirements for the material of the mold working parts are also different.
1. Requirements for punching die materials For the working parts of thin plate punching dies, high abrasion resistance and hardness are required, while for thick plate punching dies, in addition to high abrasion resistance and compressive 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 deep-drawing die materials require that the working materials of the die have good anti-adhesion (anti-seizure), high abrasion resistance and hardness, certain toughness and good cutting performance, and deformation during heat treatment Be small.
3. The requirements of cold extrusion mold materials require high strength and hardness and high wear resistance of the working parts of the mold. 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 rigidity.