The high manganese steel material was subjected to explosion hardening treatment. The same kind of explosive and the same amount of explosives were used to compare the effects of two explosions and one explosion. It was found that two explosions were better than one explosion in terms of surface strength and hardening depth. There is a significant improvement. At the same time, the impact wear performance test of high manganese steel before and after explosion hardening showed that when low hardness abrasive (glass sand) impact wear, explosion hardening increased the impact wear resistance of high manganese steel by 20 to 38%. When high-hardness abrasives (pebbles) impact wear, under the condition that the impact absorption energy is less than 1. 7J, explosion hardening increases the impact wear resistance of high manganese steel by 43 to 56%. Under the condition that the impact absorption energy is greater than 1.7J, explosion hardening will reduce the impact wear resistance of high manganese steel. Explosion hardened high manganese steel is only suitable for impact wear of low hardness abrasives and low impact wear of high hardness abrasives. Lu Bo used RDX explosive with a thickness of 3mm to blast the working surface of the high manganese steel frog twice, and the two explosion points were misaligned by more than 20mm. He could obtain a surface hardness of 380HV, a hardened layer depth of 40mm, and a gentle transition of the hardness gradient. Ideal explosion hardening effect. Explosion hardening treatment increased the actual service life of high manganese steel frogs by more than 30%. It was found that the mechanism of explosion hardening of high manganese steel is that areas with large surface deformation are deformation twins and dislocations, and areas with small internal deformation are The region is mainly dislocation-strengthened. The surface deformation mode of explosion hardening of high manganese steel is in-situ plastic deformation.