| 摘要 |
A butt-joint welding method is disclosed, which is capable of improving welding productivity by reducing the number of welding passes by weaving a welding wire in submerged arc welding. The welding method includes arranging two parent metals having 10-35 mm thickness at an interval of 8-20 mm to face each other, attaching a backing material to rear sides of the two parent metals, the rear sides facing each other, so that the backing material seals a space between the parent metals through surface-contact with the rear sides, performing flux cored arc welding or compositely performing the flux cored arc welding and submerged arc welding 1-3 times on an upper layer of the backing material, and welding the two parent metals while weaving a submerged arc welding wire transversely.
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