API X80钢管双线脉冲串联气体金属电弧焊

IF 1.5 Q4 ELECTROCHEMISTRY

International Journal of Corrosion Pub Date : 2018-03-11 DOI:10.1155/2018/7284246

Wu Wenhao, Zhao Ming, W. Haiyan, Yanxi Zhang, Wu Tong

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引用次数: 1

摘要

采用高焊接生产效率的双线脉冲串联气体金属电弧焊工艺，连接了壁厚18.4 mm、直径1422 mm的API X80钢管的环焊缝。对焊接接头的宏观组织、显微组织、硬度和电化学腐蚀行为进行了研究。研究了温度和Cl−浓度对母材和焊缝金属腐蚀行为的影响。结果表明，焊接接头具有良好的形貌、力学性能和耐腐蚀性。母材和焊缝金属的耐蚀性随温度和Cl−浓度的升高而降低。在高Cl−浓度的溶液中，母材和焊缝金属更容易发生点蚀。焊缝金属的耐腐蚀性略低于母材。

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Twin-Wire Pulsed Tandem Gas Metal Arc Welding of API X80 Steel Linepipe

Twin-Wire Pulsed Tandem Gas Metal Arc Welding process with high welding production efficiency was used to join the girth weld seam of API X80 steel linepipe of 18.4 mm wall thickness and 1422 mm diameter. The macrostructure, microstructure, hardness, and electrochemical corrosion behavior of welded joints were studied. Effects of temperature and Cl− concentration on the corrosion behavior of base metal and weld metal were investigated. Results show that the welded joint has good morphology, mechanical properties, and corrosion resistance. The corrosion resistance of both the base metal and the weld metal decreases with increasing temperature or Cl− concentration. In the solution with high Cl− concentration, the base metal and weld metal are more susceptible to pitting. The corrosion resistance of the weld metal is slightly lower than that of the base metal.

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来源期刊

International Journal of Corrosion ELECTROCHEMISTRY-

CiteScore

5.70

自引率

0.00%

发文量

审稿时长

14 weeks