1Cr17Ni2不锈钢螺栓断裂原因分析  

Fracture analysis of 1Cr17Ni2 stainless steel bolt

作　　者：陈洁明 苏军锋 王硕 李雪峰 Chen Jieming;Su Junfeng;Wang Shuo;Li Xuefeng(Luoyang Ship Material Research Institute,Luoyang Henan 471023,China;National Key Laboratory of Marine Corrosion and Protection,Luoyang Henan 471023,China;Henan Diesel Engine Industry Co.,Ltd.,Luoyang Henan 471000,China)

机构地区：[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

出　　处：《金属热处理》2025年第3期303-306,共4页Heat Treatment of Metals

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。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.

关 键 词：1Cr17Ni2不锈钢 沿晶断裂 应力腐蚀 碳化物 

分 类 号：TG172[金属学及工艺—金属表面处理]