Heat treatment process comprises cooling the steel at direct or simple hardnesses to a specified temperature above the martensitic starting temperature of the edge, heating to a specified temperature and cooling to room temperature

摘要

Heat treatment process comprises cooling the steel at direct or simple hardnesses to 20-50 deg C above the martensitic starting temperature of the edge MsR, heating to 530-590 deg C and cooling to room temperature. Preferred Features: Residual austenite conversion is carried out by deep cooling. The process further comprises annealing at 150-500 deg C.