Structure-defect analysis of crack failure in 42CrMo wind power spindle

doi:10.13251/j.issn.0254-6051.2020.07.042

Abstract

Abstract: Microstructure and composition of the cracked 42CrMo steel wind turbine spindle were analyzed by means of optical microscope, SEM and EPMA. The results show that there are a large number of sulfide and nitride inclusions near the cracks of the main shaft, and there is an obvious gap between the inclusions and the matrix, which is easy to produce cracks by the mechanism of interface debonding and cracking. At the same time, the micro area component segregation at the inclusion and the shrinkage defects near the cracks work together to eventually lead to the cracks of the main shaft.

Key words: wind power spindle, quenching cracking, defect, cracking mechanism

CLC Number:

TG157

Yuan Jingzhi, Shi Yuezhi, Xu Wenhua, Chen Lubin, Lü Yupeng. Structure-defect analysis of crack failure in 42CrMo wind power spindle[J]. Heat Treatment of Metals, 2020, 45(7): 206-209.

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Structure-defect analysis of crack failure in 42CrMo wind power spindle

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