THE HARDENING-TOUGHENING HEAT TREATMENT PROCESS OF HIGH …
(1) After quenching + tempering grinding ball heat treatment, the high chromium cast iron grinding ball obtained martensite matrix structure, in which a large number of massive and rod-like Secondary Carbides were dispersed, the surface hardness of the grinding ball was about 60HRC, the central hardness was about 56HRC The impact toughness is ...