Effect of cryogenic treatment on hardness and wear resistance of 42CrMo steel

doi:10.13251/j.issn.0254-6051.2020.09.017

Abstract

Abstract: Based on the conventional treatment of 42CrMo steel,cryogenic treatment was added.Effects of shallow cryogenic treatment and deep cryogenic treatment on hardness and wear resistance of 42CrMo steel were studied.The results show that after shallow cryogenic treatment and deep cryogenic treatment,the retained austenite in 42CrMo steel transforms to martensite,and the precipitation of carbides increases,which leads to the improvement of hardness and wear resistance of the steel,and the improvement extent of hardness and wear resistance after deep cryogenic treatment is higher than that of shallow cryogenic treatment.

Key words: 42CrMo steel, cryogenic treatment, hardness, wear resistance, microstructure

CLC Number:

TG156.91

Zhang Haidong, Yan Xianguo, Chen Zhi, Zhao Minna, Gao Yuan, Li Junji, Li Jinfeng, Gao Limei. Effect of cryogenic treatment on hardness and wear resistance of 42CrMo steel[J]. Heat Treatment of Metals, 2020, 45(9): 96-98.

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