金属热处理 ›› 2020, Vol. 45 ›› Issue (7): 206-209.DOI: 10.13251/j.issn.0254-6051.2020.07.042

• 测试与分析 • 上一篇    下一篇

42CrMo钢风电主轴开裂失效的组织缺陷分析

苑静之1, 时乐智2, 许文花1, 陈鹭滨1, 吕宇鹏1   

  1. 1. 山东大学 材料科学与工程学院, 山东 济南 250061;
    2. 金雷科技股份公司, 山东 济南 271105
  • 收稿日期:2020-01-08 出版日期:2020-07-25 发布日期:2020-09-07
  • 通讯作者: 许文花, 工程师, 硕士, E-mail:xuwh2009@sdu.edu.cn
  • 作者简介:苑静之(1994—), 女, 硕士研究生, 主要研究方向为大锻件热处理过程的数值模拟, E-mail:1421503575@qq.com。

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

Yuan Jingzhi1, Shi Yuezhi2, Xu Wenhua1, Chen Lubin1, Lü Yupeng1   

  1. 1. School of Materials Science and Engineering, Shandong University, Jinan Shandong 250061, China;
    2. Jinlei Technology Co.,Ltd., Jinan Shandong 271105, China
  • Received:2020-01-08 Online:2020-07-25 Published:2020-09-07

摘要: 利用光学显微镜、扫描电镜和电子探针对热处理后开裂的42CrMo钢制大型风电主轴进行微观组织形貌及微区成分分析。结果表明,主轴裂纹附近存在大量的硫化物及氮化物夹杂,且夹杂物与基体存在明显的间隙面,易以界面脱粘开裂机制产生裂纹,同时夹杂处的微区成分偏析及裂纹附近的缩松缺陷共同作用最终导致主轴开裂。

关键词: 风电主轴, 淬火开裂, 缺陷, 开裂机理

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

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