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US 7,984,840 B2Granted
Dissimilar metal joining method
AssigneesNissan Motor Co., Ltd., Kojiro Kobayashi
InventorsKojiro Kobayashi, Akio Hirose, Shigeyuki Nakagawa, Kenji Miyamoto, Minoru Kasukawa, Masayuki Inoue, Tetsuji Morita
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Abstract
According to a metal joining method of the present invention, first and second dissimilar metals are joined together by interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials and causing eutectic melting at least either at an interface between the first and third metal materials or at an interface between the second and third metal materials.
Claims8
A method for joining first and second dissimilar metal materials, comprising:
- interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials;
- and
- irradiating a high-energy beam in such a manner as to form a spot on the first metal material with application of a pressure so as to break or rupture an oxide film of a surface of the second metal material and cause an eutectic melt between the second and third metal materials by conduction of heat through the first metal material,
- wherein said irradiating includes discharging the eutectic melt together with the oxide film from between the first and second metal materials such that first and second metal materials are joined directly together at clean surfaces thereof.
1 more element
Dependencies are inferred from the claim text.