| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method capable of preventing weld defects from remaining in a bead joint portion in a case of bonding steel materials together by welding.SOLUTION: A welding method is a welding method for forming a joint portion of beads in edges of cylindrical or flat steel materials at a predetermined thickness from both of front and rear surfaces of the steel materials by laser welding and tungsten inert-gas arc (TIG) welding to bond the steel materials together. The welding method comprises: forming a notch in part of a boundary between the steel materials; performing laser welding on the boundary so that a starting end or a termination end of welding is located at a position adjacent to the formed notch, and forming the beads; cutting off a range starting at a position of the notch and including the notch and the starting end or the termination end of welding, and forming a cutoff portion; filling the formed cutoff portion with molten metal by the TIG welding using filler. |
