| 摘要 |
PURPOSE:To obtain a T joint with high quality by providing a round groove to moderate welding shrinkage stress concentration on the surfaces of base metals in the vicinity of a welding starting part to prevent a crack from being generated. CONSTITUTION:Second base metal 2 is welded to first base metal 1. Molten metal is prevented from dropping at the time of welding by a tab plate 3 and the base metals 1 and 2 are welded and coupled together by a weld bead 4 and a penetration line 5 on the first base metal 1 is generated at the time of welding. The round groove 7 to moderate the concentration is provided on the first base metal 1 in the vicinity of the welding starting part. By this method, the welding shrinkage stress concentration on the starting part of penetration on the first base metal 1 is mitigated and the crack is prevented from being generated and the T joint with the high quality can be obtained. |
