To provide a dissimilar material overlap-joining method capable of performing the high-strength joining without giving high heat input even when a dense oxide film is interposed between joining interfaces of materials formed by overlapping a high melting point material on a low melting point material, a joining device which is favorably used for joining the dissimilar materials, and a joining structure by this method.
When a high melting point material 1 and a low melting point material 2 having melting points different from each other overlap and are joined with each other, both materials 1, 2 are heated by irradiating high energy beams on a surface of the high melting point material 1 while partially breaking an oxide film present on the joining interface. Both heated materials 1, 2 are relatively pressed against each other to continuously or intermittently joined with each other.
COPYRIGHT: (C)2008,JPO&INPIT
Kenji Miyamoto
Masayuki Inoue
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