Heat treatment processes of 42CrMo steel gear ring after forging

doi:10.13251/j.issn.0254-6051.2023.11.040

Abstract

Abstract: Post-forging heat treatments (directly air-cooling, reheating annealing and forging waste-heat annealing after forging) were carried out for the 42CrMo steel forged gear rings, and then the gears under three different post-forging heat treatment conditions were finally quenched and tempered. The microstructure and hardness of the post-forging heat treated gear rings were characterized, and the body properties and microstructure of the quenched and tempered gear rings were tested and analyzed. The results show that the 42CrMo steel forging gear rings after three different post-forging heat treatments can meet the final property requirements after quenching and tempering. However, the microstructure of the body after the forging waste-heat annealing+quenching and tempering is more uniform, the comprehensive property matching of the impact property and strength is better, and the waste-heat annealing after forging is also a green manufacturing process for energy saving and consumption reduction, and coincides with the goals of carbon peaking and carbon neutrality.

Key words: 42CrMo steel, post-forging heat treatment, quenching and tempering, microstructure, mechanical properties

CLC Number:

TG156

Chen Yongxiang, Li Yong, Wang Tao, Yang Gang, Yang Min, Zhong Xiaomei. Heat treatment processes of 42CrMo steel gear ring after forging[J]. Heat Treatment of Metals, 2023, 48(11): 245-249.

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