金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 296-300.DOI: 10.13251/j.issn.0254-6051.2022.08.049

• 失效分析 • 上一篇    下一篇

40CrNiMoA钢传动轴花键开裂失效分析

金玉亮1, 刘春江2, 吴彬龙1, 张洪亮3   

  1. 1.哈尔滨东安发动机有限公司, 黑龙江 哈尔滨 150066;
    2.北京航空材料研究院, 北京 100095;
    3.沈阳航空航天大学 材料科学与工程学院, 辽宁 沈阳 110136
  • 收稿日期:2022-03-01 修回日期:2022-06-12 出版日期:2022-08-25 发布日期:2022-09-19
  • 通讯作者: 张洪亮,讲师,E-mail:hlzhang@sau.edu.cn
  • 作者简介:金玉亮(1983—),男,高级工程师,硕士,主要研究方向为金属材料及热处理,E-mail:jinyuliang1207@163.com。
  • 基金资助:
    辽宁省教育厅2021年度科学研究经费项目(面上项目)(LJKZ0170)

Failure analysis of 40CrNiMoA steel transmission shaft spline

Jin Yuliang1, Liu Chunjiang2, Wu Binlong1, Zhang Hongliang3   

  1. 1. Harbin Dongan Engine Co., Ltd., Harbin Heilongjiang 150066, China;
    2. Beijing Institute of Aeronautical Materials, Beijing 100095, China;
    3. School of Materials Science and Engineering, Shenyang Aerospace Universtiy, Shenyang Liaoning 110136, China
  • Received:2022-03-01 Revised:2022-06-12 Online:2022-08-25 Published:2022-09-19

摘要: 某航空发动机用40CrNiMoA钢制传动轴在正常故障检测时花键部位发现裂纹。对断口部位进行宏观分析、扫描电镜及能谱分析、金相分析、硬度分析和温色对比试验分析。结果表明,40CrNiMoA钢传动轴花键原始裂纹区组织与基体一致,未见脱碳现象,裂纹呈沿晶开裂,表面氧化较明显。因此可推断此裂纹是在高频淬火升温阶段产生,高频淬火时加热电流过大或加热不均匀均有可能造成上述淬火裂纹的出现。建议合理控制传动轴高频淬火工艺。

关键词: 传动轴花键, 40CrNiMoA钢, 淬火裂纹, 高频淬火

Abstract: Cracks were found in the spline part of 40CrNiMoA steel transmission shaft used in a aero engine during normal inspection. Macro analysis, scanning electron microscopy and energy spectrum analysis, metallographic analysis, hardness analysis and temperature and color contrast experimental analysis were carried out on the fracture site. The results show that the structure of spline crack zone of the 40CrNiMoA transmission shaft is consistent with that of the matrix, and no decarburization phenomenon is observed. The crack is intergranular fracture, and the oxidation of crack surface is obvious. Therefore, it can be inferred that the crack is generated during the heating stage of high-frequency quenching, which results from excessive heating current or uneven heating. It is suggested to reasonably control the high frequency quenching process of transmission shaft.

Key words: drive shaft spline, 40CrNiMoA steel, quenching cracks, high frequency quenching

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