Failure analysis of driving bevel gear of heavy truck rear axle

doi:10.13251/j.issn.0254-6051.2021.02.041

Abstract

Abstract: Failure reasons of a failed gear of heavy truck rear axle were analyzed by using scanning electron microscope, optical microscope, spark discharge atomic emission spectrometer, hydrogen determination instrument and Brinell hardness tester. The results show that all the performance indexes of the failure gear meet the requirements of the standard, and the hydrogen content is relatively low. The main reason for the failure is the delayed fracture failure caused by the stress concentration at the connection between the hollow groove of the screw thread and the spline at the end of the gear shaft.

Key words: 22CrMoH gear steel, driving gear, heavy truck, failure analysis

CLC Number:

TG142.4

Cheng Yuan, Hu Fangzhong, Hu Naiyue, Wang Kaizhong, Wang Lianglin, Jin Guozhong, Hao Zhenyu. Failure analysis of driving bevel gear of heavy truck rear axle[J]. Heat Treatment of Metals, 2021, 46(2): 218-222.

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