高速中间轴齿轮开裂失效分析

doi:10.13251/j.issn.0254-6051.2023.07.048

金属热处理 ›› 2023, Vol. 48 ›› Issue (7): 287-291.DOI: 10.13251/j.issn.0254-6051.2023.07.048

高速中间轴齿轮开裂失效分析

陈生超^1,2, 陈业生³, 戎泽玉¹, 王红伟¹, 许鸿翔¹, 赵少甫¹, 郭敬强¹

1.郑州机械研究所有限公司, 河南郑州 450001;
2.郑州大学, 河南郑州 450001;
3.北京石油机械有限公司, 北京 102200

收稿日期:2022-11-07 修回日期:2023-04-21 出版日期:2023-07-25 发布日期:2023-09-04
通讯作者: 许鸿翔,正高级工程师,E-mail:13838005005@163.com
作者简介:陈生超(1987—),男,工程师,博士研究生,主要研究方向为齿轮热处理工艺及失效分析,E-mail:csc19871012@163.com。

Cracking failure analysis on high-speed intermediate shaft gear

Chen Shengchao^1,2, Chen Yesheng³, Rong Zeyu¹, Wang Hongwei¹, Xu Hongxiang¹, Zhao Shaofu¹, Guo Jingqiang¹

1. Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou Henan 450001, China;
2. Zhengzhou University, Zhengzhou Henan 450001, China;
3. Beijing Petroleum Machinery Co., Ltd., Beijing 102200, China

Received:2022-11-07 Revised:2023-04-21 Online:2023-07-25 Published:2023-09-04

摘要/Abstract

摘要： 某齿轮箱中的18CrNiMo7-6钢高速中间轴齿轮在渗碳淬火磨齿后做动平衡试验过程中出现振动异响,拆机后发现中间轴齿轮在轴径处出现明显的轴向裂纹。通过宏观观察、多次切割后找到裂纹源位于大轴齿轮心部,在裂纹源处取样进行化学成分、显微组织分析等方法对开裂位置进行研究。结果表明,由于大型齿坯锻件去氢处理不完全,随着时间的推移,氢原子聚集形成氢分子,在工件内部造成应力集中,导致该轴齿轮在渗碳淬火磨齿后发生延迟性氢脆开裂,引起轴齿轮失效。

关键词: 高速轴齿轮, 18CrNiMo7-6钢, 开裂, 氢脆, 失效分析

Abstract: A 18CrNiMo7-6 steel high speed intermediate shaft gear of gearbox had abnormal vibration sound during the dynamic balance test after carburizing and quenching. After disassembly, it was found that the intermediate shaft gear had obvious axial crack at the axial diameter. After macro observation and multiple cutting, it was found that the crack source was located at the axle center of the large gear. The crack location of the main shaft was studied by chemical composition analysis and microstructure analysis. The results show that due to the incomplete dehydrogenation treatment of the large billet forgings, the hydrogen atoms gather to form hydrogen molecules over time, which causes the stress concentration inside the workpiece, leading to the delayed hydrogen embrittlement cracking of the gear shaft after carburizing and quenching, and resulting in the failure of the shaft gear.

Key words: high speed shaft gear, 18CrNiMo7-6 steel, cracking, hydrogen embrittlement, failure analysis

中图分类号:

陈生超, 陈业生, 戎泽玉, 王红伟, 许鸿翔, 赵少甫, 郭敬强. 高速中间轴齿轮开裂失效分析[J]. 金属热处理, 2023, 48(7): 287-291.

Chen Shengchao, Chen Yesheng, Rong Zeyu, Wang Hongwei, Xu Hongxiang, Zhao Shaofu, Guo Jingqiang. Cracking failure analysis on high-speed intermediate shaft gear[J]. Heat Treatment of Metals, 2023, 48(7): 287-291.

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高速中间轴齿轮开裂失效分析

Cracking failure analysis on high-speed intermediate shaft gear

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