Failure analysis of gear fracture cracking during bench test

doi:10.13251/j.issn.0254-6051.2021.01.043

Abstract

Abstract: Causes of gear fracture failure were analyzed by means of metallographic analysis,fracture analysis,tooth profile and lead analysis.The results show that though the surface unqualified non-martensite structure of the root was observed,it is not the main cause of this gear fracture.The main reason is the presence of large-scale oxide inclusion on the root subsurface of gear teeth,which is the fatigue source under the continuous stress during bench test,and leads to the fish-eye type fatigue cracking.

Key words: gear, failure analysis, inclusion, fish-eye type fatigue cracking

CLC Number:

TG142.4

He Liangliang, Wang Yuandong, Wang Mengmeng, Hou Shengwen, Wang Yan. Failure analysis of gear fracture cracking during bench test[J]. Heat Treatment of Metals, 2021, 46(1): 235-238.

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Failure analysis of gear fracture cracking during bench test

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