Heat treatment of tool steel

The service life of tool steel is closely related to the quality of its heat treatment. The heat treatment of tool steel is characterized by nodularization annealing in advance to obtain uniform and moderate particle size nodularization structure. The final heat treatment is quenching and low temperature tempering (high-speed steel is quenched and tempered at 560℃ three times). In order to obtain a high hardness structure with uniform fine carbide distributed on the tempered martensite matrix, to ensure the wear resistance of the tool. The heat treatment of hot forging die steel is different, its pre-heat treatment is a stage of annealing, and the final hot treatment is quenching and medium temperature tempering or high temperature tempering, in order to obtain good comprehensive mechanical properties.