| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for high-speed one-side submerged arc welding, which solves a problem that a back bead becomes unstable and imparts excellent welding quality. SOLUTION: In a one-side submerged arc welding method, materials to be welded are abutted onto each other to form a groove, backing flux is placed on the back face of a groove line, and the materials are welded from one-side using three electrodes, which have a 1st electrode 1, a 2nd electrode 2, and a 3rd electrode 3, or using more electrodes, wherein the groove is a V-shaped groove, the groove angle of the V-shaped groove is 30-50°, the filling factor of a groove filler to the sectional area of the groove is 50-100% and the welding speed is 60-200 cm/min. As for the groove filler, the ratio of particles with≥150 and < 250μm in diameter to the total weight of the groove filler is≥70 mass%, the ratio of particles with > 250μm in diameter to the total weight of the groove filler is≤15 mass%, and the ratio of particles with < 150μm in diameter to the total weight of the groove filler is≤10 mass%. COPYRIGHT: (C)2006,JPO&NCIPI |
