金属热处理 ›› 2021, Vol. 46 ›› Issue (2): 218-222.DOI: 10.13251/j.issn.0254-6051.2021.02.041

• 测试与分析 • 上一篇    下一篇

重型汽车后桥主动锥齿轮的失效分析

程源1, 胡芳忠2, 胡乃悦2, 汪开忠2, 王良林1, 金国忠2, 郝震宇2   

  1. 1.安徽华菱汽车有限公司 车桥分公司, 安徽 马鞍山 243000;
    2.马鞍山钢铁股份有限公司 技术中心, 安徽 马鞍山 243000
  • 收稿日期:2020-07-23 出版日期:2021-02-25 发布日期:2021-05-08
  • 通讯作者: 胡乃悦,助理工程师,硕士,E-mail:1392988022@qq.com
  • 作者简介:程源(1985—),男,工程师,主要研究方向为汽车车桥产品开发,E-mail:chengyuan4698@163.com。
  • 基金资助:
    工信部工业强基项目

Failure analysis of driving bevel gear of heavy truck rear axle

Cheng Yuan1, Hu Fangzhong2, Hu Naiyue2, Wang Kaizhong2, Wang Lianglin1, Jin Guozhong2, Hao Zhenyu2   

  1. 1. Cheqiao Branch, Anhui Hualing Automobile Co., Ltd., Ma'anshan Anhui 243000, China;
    2. Technical Center, Maanshan Iron & Steel Co., Ltd., Ma'anshan Anhui 243000, China
  • Received:2020-07-23 Online:2021-02-25 Published:2021-05-08

摘要: 采用扫描电镜、光学显微镜、火花放电原子发射光谱仪、定氢仪以及布氏硬度计对重型汽车后桥主动齿轮失效原因进行了分析。结果表明:失效齿轮的各项性能指标均满足标准要求,氢含量较低,失效原因主要是由于预紧力过大致使在齿轮轴尾部螺纹空刀槽与花键连接处应力集中导致的延迟断裂失效。

关键词: 22CrMoH齿轮钢, 主动齿轮, 重型汽车, 失效分析

Abstract: Failure reasons of a failed gear of heavy truck rear axle were analyzed by using scanning electron microscope, optical microscope, spark discharge atomic emission spectrometer, hydrogen determination instrument and Brinell hardness tester. The results show that all the performance indexes of the failure gear meet the requirements of the standard, and the hydrogen content is relatively low. The main reason for the failure is the delayed fracture failure caused by the stress concentration at the connection between the hollow groove of the screw thread and the spline at the end of the gear shaft.

Key words: 22CrMoH gear steel, driving gear, heavy truck, failure analysis

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