| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining method where a butted part between metal members is subjected to friction stir welding from the front surface side and the rear surface side, and the airtightness and watertightness of the metal members can be improved. SOLUTION: The method has: a first final joining step for applying friction stirring from a front surface A of the metal member 1 to be joined; a second final joining step for applying friction stirring from a rear surface B of the metal member 1 to be joined; a repair material inserting step for inserting a void part repair member U2 and a void part repair member U3 into a groove hole formed at the side face of the metal member 1 to be joined; and a side face final joining step subjecting a butted part to friction stirring from the side faces of the metal member 1 to be joined. In the side face final joining step, an unplasticized region between a front surface side plasticized region W1 and a rear surface side plasticized region W2 are subjected to friction stirring, and further, butted parts between the void part repair members U2, U3 and the surface side plasticized region W1 and the rear surface side plasticized region W2 are subjected to friction stirring. COPYRIGHT: (C)2009,JPO&INPIT
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