Hot work die steel and cold work die steel are two commonly used die steel materials, and they have some differences in use and performance.
First of all, hot work mold steel refers to mold steel materials that are processed and used at high temperatures. It is usually used for hot pressing molds, hot shearing molds, hot stamping molds, etc. Hot work die steel has high heat resistance and wear resistance, and can maintain good hardness and strength at high temperatures. This is because hot work die steel contains higher alloying elements, such as molybdenum, cobalt, tungsten, etc. These alloying elements can improve the heat resistance and wear resistance of the steel. In addition, hot work die steel also has good toughness and impact resistance, and can withstand large impact loads.
Cold work die steel refers to die steel materials that are processed and used at room temperature. It is usually used for cold punching dies, cold shearing dies, cold extrusion dies, etc. Cold work die steel has high hardness and wear resistance, and can maintain good cutting performance at room temperature. The content of alloy elements in cold work die steel is low, and the hardness and strength of the steel are mainly increased through cold treatment and quenching. In addition, cold work mold steel also has good dimensional stability and surface quality, and can meet the requirements of high-precision molds.
In terms of use, hot work mold steel usually needs to be processed and used at high temperatures, so it requires higher cooling and protection requirements for the mold. Hot work die steel is prone to thermal stress and thermal fatigue during use, so appropriate preheating and annealing treatments are required to improve the heat resistance and thermal fatigue resistance of the steel. Cold work mold steel can be processed and used at room temperature without special heat treatment, making it more convenient to use.
In general, hot work die steel and cold work die steel are different in terms of heat resistance, wear resistance, hardness, etc., and are suitable for different processing and use conditions. Choosing the right mold steel material can improve the service life and processing efficiency of the mold, thereby reducing production costs.

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