ASSEMBLY WELDING METHOD FOR STAINLESS STEEL WELDMENT AND PAD

摘要

An assembly welding method for a stainless steel weldment and a pad comprises the following steps: a. forming grooves on to-be-processed portions of two weldments, and fitting up, wherein during fit-up, inner walls of the two weldments keep flush, the opposite grooves of the two weldments form a V-shaped notch whose included angle is α, and a 2-4mm gap L is reserved between the bottoms of the grooves of the two weldments; b. disposing a bronze pad (11) at the gap L at the bottoms of the grooves of the two weldments, wherein the bronze pad (11) closely contacts the inners walls of the two weldments; c. welding the V-shaped notch to form a root weld pass; and d. removing the bronze pad (11), and performing filling welding on the root weld pass to form a cosmetic weld pass. The method can easily form a root portion of a weld seam of stainless steel, reduce the probability of defects such as lack of penetration and lack of fusion, avoid backside oxidization during use of an argon tungsten-arc welding method, omit an argon filling protection process on the inner wall of the weldment, reduce the weld cost, and improve the environment of the welding operation.