PENETRATION WELDING METHOD OF T-TYPE JOINT AND PENETRATION WELDING STRUCTURE OF T-TYPE JOINT

摘要

PROBLEM TO BE SOLVED: To provide a sound welding metal part for which a groove or a gap formed on the upper plate side is dispensed with and for which, by arc welding from the upper plate surface, fusion-welding is performed as far as a lower vertical plate.;SOLUTION: An upper plate 1 is arranged on the top surface of a lower vertical plate 3 to form a T-type joint, and a penetration promoter 4 is applied on the surface of the upper plate 1 of the T-type joint. Subsequently, when performing non-consumable electrode arc welding, a penetration width w of a molten pool 7a on the side of the vertical plate 3 after penetrating through the back side of the vertical plate 1 is formed equal to or greater than the vertical plate thickness T2 if a lower vertical plate thickness T2 is the same thickness as an upper plate thickness T1 or thinner than the upper plate thickness T1, and the penetration width w of the molten pool is formed equal to or greater than the upper plate thickness T1 if the lower vertical plate thickness T2 is thicker than the upper plate thickness T1, thereby forming a penetration shape having a desired welding metal part 7b.;COPYRIGHT: (C)2009,JPO&INPIT