| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stir welding method that can provide sufficient joining strength even in joining metallic members having melting points different from each other. SOLUTION: For the purpose of joining materials having melting points different from each other, the friction stir welding method uses a rotary tool X comprising a columnar tool body 10 and a probe 20 which has smaller diameter than the tool body 10, is formed coaxially with the tool body 10 in a projecting manner from one end of and the tool body 10 is rotatable integrally with the tool body 10. In the method, a first material A having a prescribed melting point and a second material B having a melting point lower than that of the first material A are abutted on each other, the surface height H2 of the second material B is set higher than the surface height H1 of the first material A, the rotary tool X is rotated while the probe 20 is imbedded in the second material B with respect to the abutting part R of the first and second materials A, B and a part of the lower face of the tool body 10 is in contact with the surface of the second material B, thus softening or solidifying the second material B and joining it to the first material A. COPYRIGHT: (C)2010,JPO&INPIT |
