金属热处理 ›› 2024, Vol. 49 ›› Issue (4): 296-299.DOI: 10.13251/j.issn.0254-6051.2024.04.048

• 失效分析 • 上一篇    下一篇

某50CrVA弹簧钢零件断裂原因分析

崔景博, 汪凌波, 国飞, 卢振国   

  1. 辽沈工业集团有限公司, 辽宁 沈阳 110045
  • 收稿日期:2023-11-13 修回日期:2024-03-11 出版日期:2024-04-25 发布日期:2024-05-27
  • 作者简介:崔景博(1978—),男,高级工程师,主要研究方向为金相检测及失效分析,E-mail: 13998119640@163.com

Fracture cause analysis of a 50CrVA spring steel part

Cui Jingbo, Wang Lingbo, Guo Fei, Lu Zhenguo   

  1. Liaoshen Industry Group Co., Ltd., Shenyang Liaoning 110045, China
  • Received:2023-11-13 Revised:2024-03-11 Online:2024-04-25 Published:2024-05-27

摘要: 采用金相显微镜、扫描电镜、氧氮氢分析仪等设备对某50CrVA弹簧钢零件断裂原因进行了分析。结果表明,50CrVA弹簧钢零件断裂均发生在直角拐角的应力集中处,经过镀锌后,由于除氢处理不完全,产生了氢脆。对此提出了改进措施,如及时更换钝化的落料模具,增加除氢处理的时间。

关键词: 50CrVA弹簧钢, 零件, 应力集中, 氢脆, 模具钝化

Abstract: Fracture cause of a 50CrVA spring steel part was analyzed by means of metallographic microscope, scanning electron microscope and analyzer of oxygen, nitrogen and hydrogen. The results show that the fracture of the 50CrVA spring steel occurs at the stress concentration position in the right corner in type of hydrogen embrittlement produced due to incomplete hydrogen removal treatment after galvanizing. Finally, the improvement measures are proposed, i.e., the blunted blanking die should be timely replaced, and the time of the hydrogen removal treatment should be increased.

Key words: 50CrVA spring steel, parts, stress concentration, hydrogen embrittlement, die blunting

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