| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for friction stir welding by which a nut made of aluminum or an aluminum alloy is welded in a short time with a base material made of aluminum or an aluminum alloy, a predetermined welding strength is obtained, a heat input and a strain are small, the flatness, the roughness, and the strength of material which the base material has before the welding are preserved, and a stable joining condition is available. SOLUTION: The nut 1 made of aluminum or an aluminum alloy is abutted to the base material 3 made of aluminum or an aluminum alloy while the nut is rotating, a frictional stir is generated at the abutted part, and the nut 1 and the base material 3 are joined by the friction stir welding without melting the nut and the base material. |
