Mechanism and Prevention of the End Crack in One Side Submerged Arc Welding (Report 2)

Observation of Rotative Distortion and It's Prevention with the Tab Plate

Abstract

When the arc run-off onto the terminal end tab plate in one side submerged arc welding, the restraint by tack welding is released and rapid rotative distortion acts upon the weld metal just after solified and creates the end crack. And the quantity of rotative distortion influences upon the frequency of end crack.
Slit tab plate which restrict the end of weld joint flexibly can avoid rapid rotative distortion and is effective on prevention of end crack.