METAL JOINING MEMBER AND ITS JOINING METHOD

摘要

PROBLEM TO BE SOLVED: To provide metal joining members and their joining method which can bring a high strength joint between a low temperature softening metal member and a high temperature softening metal member.

SOLUTION: A facing part 2a of the low temperature softening metallic material 2 with a low softening temperature and a facing part 3a of the high temperature softening metallic material 3 with a higher softening temperature than the low temperature softening metallic material 2 are arranged face to face. Each facing part 2a, 3a is bonded by friction-stirring to form a metal-joined member. In the method, the facing part 3a of the high temperature softening metallic material 3 has a recessed part 3b, while the facing part 2a of the low temperature softening metallic material 2 has a projected part 2b which flows into the recessed part 3b for bonding by the friction-stirring.

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