摘要
冷变形316L不锈钢电缆穿线无缝管在现场应用过程中发生开裂。通过形貌观察、化学成分分析、力学性能检测、残余应力分析、显微组织分析等方法,对其开裂原因进行分析。结果表明:开裂管道的化学成分符合标准规定,且无析出相和夹杂物,冷变形引入的高密度位错和冷变形滑移带使管道强度、硬度显著提高,并且管道内部存在较高的残余应力,这是导致管道在湿H_(2)S环境中发生氢致应力腐蚀开裂的主要原因。
Cracking occurred in cracked application of cold deformed 316 L stainless steel cable threading seamless pipe. The failure reasons were analyzed by morphology observation, chemical composition analysis, mechanical property test, residual stress analysis and microstructure analysis. The results showed that chemical composition of the cracked pipeline met the standard stipulation, and there were no precipitates and inclusions. The high density dislocation and slip band introduced by cold deformation made the strength and hardness of the pipe increased obviously and there was a high residual stress in pipeline, which was the main reason for hydrogen-induced stress corrosion cracking of the pipeline in wet H2S environment.
作者
钱炯
钟强
周宇宾
王宝顺
张春芬
张洁洁
王春
许虹怡
QIAN Jiong;ZHONG Qiang;ZHOU Yubin;WANG Baoshun;ZHANG Chunfen;ZHANG Jiejie;WANG Chun;XU Hongyi(Jiuli International Science and Technology Cooperation Base for Special Alloy Material Corrosion and Protection,Huzhou 313028,China;Engineering Research Center of High-Performance Nuclear Power Pipe Forming of Zhejiang Province,Huzhou 313028,China;Jiuli Corrosion and Integrity Center,University of Leeds,Leeds LS29JT,England;School of Engineering,Huzhou Normal University,Huzhou 313000,China)
出处
《腐蚀与防护》
CAS
北大核心
2021年第9期115-120,共6页
Corrosion & Protection
