Difference between Cold Work Die Steel and Hot Work Die Steel

Cold work die steel refers to a die steel used for deformation or molding of a metal in a cold state, and hot work die steel refers to an alloy tool steel suitable for heat deformation processing. What are the differences between Huangshi Cold Work Die Steel and Hot Work Die Steel? Let's take a look.

In terms of classification, the cold work die steel includes manufacturing blanking die (blank punching die, trimming die, punch, and scissors), cold die and cold extrusion die, bending die, and drawing die. Hot die steels include hammer forging dies, hot extrusion dies and die casting dies.

In terms of working conditions, cold die steels require higher hardness and wear resistance of the die because when the cold die steel is used, the material will be deformed, and the natural deformation resistance is relatively large. Therefore, the die must be relatively Strong compressive resistance can guarantee the smooth progress of stamping. Hot die steels are generally in direct contact with hot metal. Therefore, hot die steels are required to have strong thermal resistance, as well as high temperature and thermal fatigue resistance. Otherwise, the hot die steel will have a very high damage rate in a short time.

From the use of performance, cold work tool steel is a small size, simple shape, light load of cold work mold, can also be a large size, complex shape of the light load mold. Hot die steel has high mechanical properties, especially plastic deformation resistance and high toughness, with high tempering stability and high thermal fatigue resistance.