Causes analysis of quenching cracking of inner hole of first class planet carrier

doi:10.13251/j.issn.0254-6051.2021.04.045

Abstract

Abstract: The inner holes of 42CrMo4 steel planet carrier were found cracking during machining after quenching and tempering in a batch of wind turbine gearboxes. Composition segregation, microstructure, quenching process, and magnetic particle test of machined surface of the planet carriers were analyzed. The results show that too intensive quenching cooling is the direct cause of cracking, and serious segregation is the main cause of quenching cracking.

Key words: wind electricity gear box, first class planet carrier, quenching and tempering, inner hole cracking, composition segregation

CLC Number:

TG142

Yan Youzeng, Zhang Hao, Cao Qi, Meng Gaoqiang, Xia Guofeng, Xu Shuang. Causes analysis of quenching cracking of inner hole of first class planet carrier[J]. Heat Treatment of Metals, 2021, 46(4): 236-238.

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Causes analysis of quenching cracking of inner hole of first class planet carrier

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