Development of High Speed Submerged Arc Welding in Spiral Pipe Mill

Abstract

The studies were carried out to increase welding speed in the spiral pipe mill. The problems which prevent the increase of the welding speed are the occurrence of undercut, concave bead, convex bead.Investigations were carried out to solve these problems. Main results obtained are as follows;(1) The optimum welding conditions for the high speed welding were found.(2) The good bead appearance could be obtained by the use of the new flux bearing optimum amount of titanium dioxide.