| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method which can increase the flatness of a metallic member in friction stir welding where a pair of metallic members are welded. SOLUTION: The welding method comprises: a first normal welding process where a rotary tool for normal welding is moved from the side of the surface A of a metallic member along the abutting part J1 between the metallic members, and friction stir welding is performed; and a second normal welding process where, after the first normal welding process, the rotary tool H for normal welding is moved from the side of the back face B of the metallic member along the abutting part J1, and friction stir welding is performed, and a heat gain to the metallic member in the second normal welding process is set so as to be lower than that to the metallic member in the first normal welding process. COPYRIGHT: (C)2011,JPO&INPIT |
