不锈钢气相管焊接热影响区应力腐蚀开裂研究  

SCC at HAZ of Vapor Pipes Fabricated by SUS304L Stainless Steel

作　　者：林良道[1] 龚天宏[1] 

机构地区：[1]上海宝钢股份公司技术中心,上海201900

出　　处：《物理测试》2005年第3期48-52,共5页Physics Examination and Testing

摘　　要：针对一起SUS304L不锈钢化工气相管焊接热影响区(HAZ)应力腐蚀开裂(SCC)的失效综合分析,发现该不锈钢SCC为穿晶应力腐蚀开裂而不是常见的不锈钢HAZ的晶间应力腐蚀,认为SUS304L不锈钢在此服役环境中对SCC无法免疫。根据材料发生SCC失效微观特征与使用环境的关系,给出了选材和焊接加工的建议。It is investigated that the stress corrosion crack is TGSCC rather than IGSCC according to a failure analysis on the hot affected zone of a vapor pipe made of SUS304L stainless steel. It can be concluded that the SUS304L stainless steel can not be immune to SCC under the service condition.

关 键 词：气相管 焊接热影响区 应力腐蚀开裂 SUS304L不锈钢 

分 类 号：TG457[金属学及工艺—焊接]