压力环境对焊条自动平焊过程及焊缝性能的影响  

The influence of pressure environment on the welding process and weld performance of automatic flat SMAW

作　　者：李怀亮[1] 王凤瑞 孙有辉[1] 李连波[1] 王海洋 包洪慧 郝丽娅 王志江[2,3] LI Huailiang;WANG Fengrui;SUN Youhui;LI Lianbo;WANG Haiyang;BAO Honghui;HAO Liya;WANG Zhijiang(Offshore Oil Engineering Co.,Ltd.,Tianjin 300452,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300350,China)

机构地区：[1]海洋石油工程股份有限公司,天津300452 [2]天津大学材料科学与工程学院,天津300350 [3]天津市现代连接技术重点实验室,天津300350

出　　处：《金属加工（热加工）》2024年第12期50-54,共5页MW Metal Forming

摘　　要：为了探究水下局部干法焊条电弧焊在40m以下水深环境下坡口内焊接的可行性,并探索合理的焊接参数,采用自主研发的焊条自动焊机构在压力舱中进行模拟20m和40m水深条件下的局部干法自动焊接试验。试验结果表明:在0.2MPa的模拟环境压力下的电弧稳定性优于常压,而在0.4MPa压力下电弧长度变化较为频繁,电弧稳定性有所降低。通过分析工艺试验结果,获得了在两种压力下焊缝成形良好的焊接参数。经力学性能测试验证,采用该焊接参数进行坡口内多层多道焊可以获得性能优良的焊接接头。In order to explore the feasibility of underwater local-dry shielded metal arc welding(SMAW)for groove welding in the water environments(<40m)and to investigate reasonable welding process,automatic welding experiments in a pressure chamber,using a self-developed automatic SMAW mechanism,were conducted to simulate the welding process under water depths of 20m and 40m.The experimental results showed that the arc stability at a simulated-environment pressure of 0.2MPa was better than that at the atmospheric pressure,while the arc length varied more frequently and the stability decreased at a pressure of 0.4MPa.By analyzing the experimental results of the welding process,welding parameters that produced well-formed welds under both pressures were obtained.Mechanical performance tests confirmed that using these welding parameters for multi-layer multi-pass groove welding can produce weld joints with excellent performance.

关 键 词：电弧稳定性 坡口焊接 焊条电弧焊 水下局部干法焊接 

分 类 号：TG456.5[金属学及工艺—焊接] TE95[石油与天然气工程—石油机械设备]