金属热处理 ›› 2024, Vol. 49 ›› Issue (4): 293-296.DOI: 10.13251/j.issn.0254-6051.2024.04.047

• 失效分析 • 上一篇    下一篇

30CrMnSiA钢架圈零件裂纹产生原因分析

董娜, 徐周珏, 李想军, 周武风, 陈启芳, 谭睿琪, 杨羲阳   

  1. 江西洪都航空工业集团, 江西 南昌 330000
  • 收稿日期:2023-10-24 修回日期:2024-03-01 出版日期:2024-04-25 发布日期:2024-05-27
  • 作者简介:董 娜(1977—),女,高级工程师,主要研究方向为航空产品失效分析,E-mail:570916032@qq.com

Analysis on crack causes of 30CrMnSiA steel ring support

Dong Na, Xu Zhoujue, Li Xiangjun, Zhou Wufeng, Chen Qifang, Tan Ruiqi, Yang Xiyang   

  1. Jiangxi Hongdu Aviation Industry Group, Nanchang Jiangxi 330000, China
  • Received:2023-10-24 Revised:2024-03-01 Online:2024-04-25 Published:2024-05-27

摘要: 某飞机零件架圈由30CrMnSiA钢板加工而成,该零件经过调质处理后,探伤检查发现多个零件的耳片处有裂纹产生。采用宏微观形貌分析、化学成分检测和力学性能检测等方法对该批次零件开裂原因进行了综合分析。结果表明,该架圈的开裂属于原材料质量问题,由于原材料退火不充分,存在严重偏析,导致局部硬度偏高,最终产生淬火裂纹。

关键词: 钢板, 偏析, 热处理, 淬火裂纹

Abstract: After quenched-tempered heat treatment, cracks were found in the ear pieces of an aircraft part of frame ring made of 30CrMnSiA steel plate. Comprehensive analysis of the cracked frame ring and raw material were carried out through macro and micro morphology examination, spectrum chemical composition analysis and mechanical properties test. The results show that the crack cause of the frame ring is a problem of raw material quality, due to insufficient annealing of raw materials, there is serious segregation, resulting in high local hardness and eventually quenching cracks.

Key words: steel plate, segregation, heat treatment, quenching crack

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