金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 303-306.DOI: 10.13251/j.issn.0254-6051.2025.03.048

• 测试与分析 • 上一篇    下一篇

1Cr17Ni2不锈钢螺栓断裂原因分析

陈洁明1,2, 苏军锋3, 王硕1, 李雪峰1   

  1. 1.中国船舶集团有限公司第七二五研究所, 河南 洛阳 471023;
    2.海洋腐蚀与防护全国重点实验室, 河南 洛阳 471023;
    3.河南柴油机重工有限责任公司, 河南 洛阳 471000
  • 收稿日期:2024-09-28 修回日期:2025-01-22 出版日期:2025-03-25 发布日期:2025-05-14
  • 作者简介:陈洁明(1993—),男,工程师,硕士,主要研究方向为金属材料微观表征及失效分析,E-mail:jiemingch@163.com

Fracture analysis of 1Cr17Ni2 stainless steel bolt

Chen Jieming1,2, Su Junfeng3, Wang Shuo1, Li Xuefeng1   

  1. 1. Luoyang Ship Material Research Institute, Luoyang Henan 471023, China;
    2. National Key Laboratory of Marine Corrosion and Protection, Luoyang Henan 471023, China;
    3. Henan Diesel Engine Industry Co., Ltd., Luoyang Henan 471000, China
  • Received:2024-09-28 Revised:2025-01-22 Online:2025-03-25 Published:2025-05-14

摘要: 某装置的1Cr17Ni2不锈钢连接螺栓在例行检修过程中发生断裂,通过理化检验手段对螺栓的化学成分、显微组织、相结构、断口形貌、硬度等进行分析。结果表明,不锈钢螺栓的失效形式为应力腐蚀,导致应力腐蚀开裂的主要原因为材料中尺寸较大的富铬碳化物降低了材料的耐蚀性以及材料硬度超标使其具有较高的应力腐蚀敏感性。

关键词: 1Cr17Ni2不锈钢, 沿晶断裂, 应力腐蚀, 碳化物

Abstract: An 1Cr17Ni2 stainless steel connection bolt of a device broke during routine maintenance. The chemical composition, metallographic structure, phase structure, fracture morphology and hardness of the bolt were analyzed by means of physical and chemical test. The result show that failure mode of the bolt is stress corrosion. The main causes of stress corrosion cracking are that the large-sized chromium-rich carbides in the material reduce its corrosion resistance and the hardness of the material exceeds the standard requirement, which makes it highly sensitive to stress corrosion.

Key words: 1Cr17Ni2 stainless steel, intergranular fracture, stress corrosion, carbide

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