本焊接法的特点是电弧在高速水流所产生的空腔内燃烧,所焊焊缝质量几乎与陆地所焊相同。为使焊接过程自动化,研制了一种能遥控的全自动水下MAG焊设备,操作者通过监控器监控整个焊接过程。在10米深的水下对非合金钢空心钢锭对接接头(单面V型坡口,坡口角为60°,间隙1～2毫米)进行了焊接试验。锭宽4000毫 This welding method is characterized by the arc combustion in the cavity generated by high-speed water flow, the weld quality almost the same as land welding. In order to automate the welding process, a fully automatic underwater MAG welding equipment was developed. The operator monitors the whole welding process through the monitor. Welding tests were carried out on hollow steel ingot butt joints (single V-groove, bevel angle 60 °, clearance 1 to 2 mm) at a depth of 10 m under water. Ingot 4000 millimeters