| 316L不锈钢钨极氩弧焊焊接接头耐点蚀试验 |
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| 引用本文： | 舒欣欣,徐连勇,韩永典,马丽,张剑利. 316L不锈钢钨极氩弧焊焊接接头耐点蚀试验[J]. 焊管, 2011, 34(5): 24-26,32 |
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| 作者姓名： | 舒欣欣 徐连勇 韩永典 马丽 张剑利 |
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| 作者单位： | 1. 海洋石油工程股份有限公司建造公司焊接试验室,天津,300452
2. 天津大学,材料科学与工程学院,天津,300072 |
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| 摘 要： | 根据316L不锈钢的特点,开发了一种钨极氩孤焊背部免充气保护焊接工艺.对焊接接头进行了显微组织分析、点蚀试验和各区的电极电位分析.结果表明:316L焊接接头HAZ的显微组织靠母材一侧为粗大的奥氏体晶粒,靠焊缝一侧为奥氏体基体上分布着铁素体;根部焊缝的显微组织为奥氏体基体上分布着铁素体.经过72 h的点蚀试验后,上表面的...
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| 关 键 词： | 316L不锈钢 钨极氩弧焊 背部免充氩 点蚀 电极电位 |
Pitting Resistance Corrosion Test of 316L Stainless Steel TIG Welding Joints |
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| SHU Xin-xin,XU Lian-yong,HAN Yong-dian,MA Li,ZHANG Jian-li. Pitting Resistance Corrosion Test of 316L Stainless Steel TIG Welding Joints[J]. Welded Pipe and Tube, 2011, 34(5): 24-26,32 |
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| Authors: | SHU Xin-xin XU Lian-yong HAN Yong-dian MA Li ZHANG Jian-li |
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| Affiliation: | 1(1.Welding Lab,Construction Company,Offshore Oil Engineering Co.,Ltd.,Tianjin 300452,China; 2.School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | According to the welding characteristics of 316L stainless steel,a TIG welding technology of non-filling argon in the back has been developed.The microstructure,pitting corrosion tests and electrochemical tests were conducted on the 316L welding joints.The results revealed that the microstructure of HAZ was coarse austenite near base metal side and ferrite distributed in the austenite matrix near the weld metal side,and the microstructure in root weld was ferrite distributed in the austenite matrix.After 72 h pitting corrosion test,the base metal in the upper surface was serious corroded.While for the case of root weld,the corrosion resistance was commensurate to that of the adjacent base metal.The electrochemical tests results were in conformity with the pitting corrosion test ones.Hence,the TIG welding technology of non-filling argon in the back was successful. |
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| Keywords: | 316L stainless steel TIG non-filling argon in the back pitting corrosion electrochemical test |
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