Pulsed TIG Welding Conditions for Penetration Beads

Abstract

Parameters bw and Am, the width and the cross sectional area of bead, were derived from two-dimensional interfacial tension theory to obtain a mathematical solution on the formation of penetration beads.
Some pulsed TIG welding conditions, average heat input q_av, , and wire feed v_w, were introduced through calculations of heat flow and geometry from proper combinations of b_w with Am to give the convex shape to the bottom side of penetration bead.
An algorithm for these calculation processes was made to determine tube welding conditions and applied for experimental pulsed TIG welding.
Penetration beads under welding conditions obtained by the algorithm showed the excellent bead shapes which approximately agreed with the bead shapes predicted through calculations.