不锈钢可调连杆断裂失效分析
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摘要
某304奥氏体不锈钢可调连杆发生断裂。通过宏观形貌检验、微观形貌检测、显微组织分析、化学成分检测、能谱分析等方法,对连杆断裂失效的原因进行了分析。结果表明:该不锈钢可调连杆的断裂失效由应力腐蚀开裂引起,连杆材料中过高的碳含量、含硫化物和氯离子的服役环境以及工作时承受的拉应力是诱发不锈钢应力腐蚀的主要原因。
A 304 stainless steel adjustable connecting rod fractured.The reasons for fracture failure of the connecting rod were analyzed by means of macroscopic morphology examination, microscopic morphology examination,microstructure analysis,chemical composition examination and energy spectrum analysis.The results show that the fracture of the connecting rod was caused by stress corrosion cracking.Excessive carbon content in material of connecting rod,service environment containing sulfides and chloride ions,and tensile stress during operation were the main causes of the stress corrosion in stainless steel.
A 304 stainless steel adjustable connecting rod fractured.The reasons for fracture failure of the connecting rod were analyzed by means of macroscopic morphology examination, microscopic morphology examination,microstructure analysis,chemical composition examination and energy spectrum analysis.The results show that the fracture of the connecting rod was caused by stress corrosion cracking.Excessive carbon content in material of connecting rod,service environment containing sulfides and chloride ions,and tensile stress during operation were the main causes of the stress corrosion in stainless steel.
引文
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[2]张进,赵晓博,陶世杰,等.发动机连杆失效分析[J].铸造设备与工艺,2010(4):39-42.
[3]张兵,刘纯.发动机连杆失效分析[J].湖南电力,2007,27(2):30-31.
[4]方裕礻上,杨玲文,李书林.高压隔离开关螺杆失效分析[J].理化检验物理分册,1989,25(3):54-55.
[5]尚尔峰,王志明.奥氏体不锈钢连杆裂纹分析[J].失效分析与预防,2016,11(4):218-222,231.
[6](日)小若正伦.金属的腐蚀破坏与防蚀技术[M].北京:化学工业出版社,1988.
[7]刘倩倩,句光宇,王志武,等.12Cr1MoVG钢再热器管焊接接头断裂原因分析[J].金属热处理,2015,40(12):181-184.
[8]肖晓玲,况敏,林凯生,等.304不锈钢波纹补偿器失效分析[J].材料研究与应用,2013,7(4):276-279.
[9]张华,张贺,孙大同,等.2219铝合金母材及搅拌摩擦焊接头应力腐蚀敏感性[J].焊接学报,2014,35(12):7-10.
[10]刘智勇,董超芳,李晓刚,等.硫化氢环境下两种不锈钢的应力腐蚀开裂行为[J].北京科技大学学报,2009,31(3):318-323.
[11]罗宏,龚敏.奥氏体不锈钢的晶间腐蚀[J].腐蚀科学与防护技术,2006,18(5):357-360.
[12]鲁照玲,周志毅,周宇,等.换热设备用不锈钢材料腐蚀失效分析[J].腐蚀科学与防护技术,2006,18(6):443-445.
[13]KAIN V.Stress corrosion cracking(SCC)in stainless steels[M]//KAIN V.eds.Stress Corrosion Cracking.Elsevier,2011:199-244.
[14]陈云翔,林德源,洪毅成,等.福建某海岛架空输电钢芯铝绞线的失效分析[J].热处理技术与装备,2014,35(6):52-56.
[15]郝文魁,杨丙坤,陈云,等.变电站电流互感器铝合金法兰腐蚀失效分析[J].腐蚀科学与防护技术,2017,29(6):633-639.
[16]CRAMER S D,COVINO B S.ASM Handbook:Volume 13BCorrosion:Materials[M].[S.l.]:ASM International,2005:78-87.
[17]黄玲艳,唐强,张波,等.不锈钢螺栓法兰连接失效分析及预防措施[J].装备环境工程,2017,14(1):1-4.