| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction welding method capable of enhancing the joining strength between members by making the cladding of a joining part on the surface side of a groove part large. SOLUTION: On plate members 1, 2, groove faces 1A, 2A inclined aslant toward the opposing end of the plate members and edge ends 1B, 2B are previously provided. In the state where the edge ends 1B, 2B of the plate members 1, 2 are butted interposing a gap G, and on the back side thereof, a backing member 4 is disposed, and high-speed rotation is conducted, while pressing a cladding member 5 to the groove part 3 of the plate members 1, 2. In this way, high temperature friction heat is generated on the both friction contact face sides to plastically fluidize the friction contact parts, and thereby the cladlike joined part is formed. And in the plate members 1, 2 to be joined, as the friction heat is transmitted from the side of the edge ends 1B, 2B to the backing metal 4 side, the accumulation of this heat in the side of the edge ends 1B, 2B can be suppressed.
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