Research Progress on Wear Resistance of Surface Reinforcement Layer of H13 Hot Work Die Steel

H13 steel is widely used in hot extrusion die and die casting die of aluminum alloy, magnesium alloy and other metals. The service environment is harsh, and the wear resistance of H13 steel is seriously insufficient after conventional treatment of quenching and tempering, which is easy to lead to the occurrence of thermal fatigue cracks, thus affecting the service life of the die and product quality. Strengthening the surface of H13 hot work die steel is an effective means to improve the wear resistance and service life. The research status and progress of surface strengthening of H13 hot work die steel in China and abroad were reviewed, and the development direction of surface modification technology of H13 die steel was prospected.