Development of a Smart Underwater 'Wet' Welding Process

摘要

For underwater wet welding, the improvement of manual methods and systems arenecessary since fully mechanized and automatic repair are not always available for already existing pipelines and offshore structures. A suitable method must be available for emergency repair work. The development of fully mechanized methods will take a long time before they are operationally ready. Recent investigation indicates that wet semi-automatic flux cored arc welding process will show the greatest potential. In this project, automatic flux cored arc welding was first conducted underwater to eliminate human factors. The base metal used was an ASTM A36 mild steel, the filler materials were two ferritic steel wires and an austenitic stainless steel wire.