金属加工（热加工）Issue(6)：125-129,136,6.
某核电厂SAF2507双相不锈钢管道开裂原因分析
Causes of cracking in SAF2507 duplex stainless steel pipelines for a nuclear power plant
刘永生 1杜爱国1
作者信息
- 1. 江苏核电有限公司 江苏连云港 222042
- 折叠
摘要
Abstract
The cracks were detected in a SAF2507 duplex stainless steel pipelines for a nuclear power plant.The causes of the cracking were analyzed using chemical composition analysis,metallographic examination,scanning electron microscope observation,energy spectrum analysis.The results show that the cracks type is SCC,the cracks originates form the inner surface of pipeline.The root cause of the defects is that there is excessive repair welding in the weld,which increases the sensitivity of the material to intergranular corrosion,and SCC occurs under the combined action of residual stress and chloride ion in seawater.关键词
双相不锈钢/应力腐蚀开裂/氯离子/SAF2507钢/管道焊缝Key words
duplex stainless steel/stress corrosion cracking/chloride ion/SAF2507 steel/pipeline weld引用本文复制引用
刘永生,杜爱国..某核电厂SAF2507双相不锈钢管道开裂原因分析[J].金属加工（热加工）,2024,(6):125-129,136,6.
