Study on Spheroidizing Annealing Process of 5Cr5MoSiV1 Steel for Shield Tools
The spheroidizing annealing process of 5Cr5MoSiV1 steel for shield tools was studied,in which the effects of annealing temperature and holding time on the number,size,shape and distribution of carbides particles as well as hardness were investigated.The results show that with the increase of annealing temperature,the number of carbides particles decreases while particle size increases gradually.Carbides particles become rounder and well distributed,meanwhile hardness decreases gradually.With prolonging annealing time,the effects of annealing time on the spheroidization of carbides and hardness are similar to that of annealing temperature.900 ℃× 4 h is the optimum spheroidizing annealing process for 5Cr5MoSiV1 steel.