RAISING TOOL STEEL CORROSION RESISTANCE BY PHASE COMPOSITION REGULATION IN GAS THERMAL PROCESSING

摘要

It has been found that gas thermocyclic nitriding should be used to increase the corrosion resistance of tool steels: saturation temperature 520℃, equilibration temperature 620℃, half-cycle length 0.5 h, number of cycles 7, last stage equilibration for 0.5 h.