Effect of high pressure heat treatment on microstructure and hardness of 35CrMo steel

doi:10.13251/j.issn.0254-6051.2022.06.023

Abstract

Abstract: Microstructure and hardness of 35CrMo steel treated by high pressure heat treatment combined with high temperature tempering were analyzed and tested by metallographic microscope, scanning electron microscope, transmission electron microscope and hardness tester, and compared with the traditional quenching and tempering process. The results show that after high pressure heat treatment and high temperature tempering, 35CrMo steel can precipitate dispersed granular carbides, the hardness of the 35CrMo steel is effectively improved. After 3 GPa pressure, high pressure heat treatment at 860 ℃ for 20 min and tempering at 550 ℃ for 60 min, the hardness of the 35CrMo steel is 45 HRC, which is 7.14% higher than that treated by the traditional quenching and tempering with the same process.

Key words: 35CrMo steel, high pressure heat treatment, quenching and tempering, microstructure, hardness

CLC Number:

TG161

Yang Xiaoyu, Li Xiaoxiao, Tong Jing, Hu Shukai. Effect of high pressure heat treatment on microstructure and hardness of 35CrMo steel[J]. Heat Treatment of Metals, 2022, 47(6): 119-122.

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