METHOD FOR WELDING DIFFUSION JUNCTION BODY

• Main Authors: MATSUOKA TAKAAKI, MASAKI KUNITAKA, MIZO YUTAKA, HOSOYA NAGISA, HARADA RIE
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2018
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To enable cracks in a diffusion weld part of a diffusion junction body to be suppressed when the diffusion junction body is joined with another member by melt welding in a method for welding a diffusion junction body.SOLUTION: A method for welding a diffusion junction body, formed by diffusion junction of metal members with each other, with another member by melt welding comprises: a buffer layer forming step (S10) of forming a buffer layer having a larger ductility than the diffusion junction part in a weld region including a diffusion junction part of a diffusion junction body; and a welding step (S12) of joining a weld region, where a buffer layer is formed with another region, by melt welding from above another member.SELECTED DRAWING: Figure 1 【課題】拡散接合体の溶接方法において、拡散接合体と、他の部材とを、溶融溶接で接合するときにおける拡散接合体の拡散接合部の割れを抑制可能なことである。【解決手段】金属部材同士を拡散接合して形成した拡散接合体と、他の部材と、を溶融溶接により接合する拡散接合体の溶接方法は、拡散接合体の拡散接合部を含む溶接領域に、拡散接合部より延性が大きい緩衝層を形成する緩衝層形成工程（Ｓ１０）と、緩衝層が形成された溶接領域と、他の部材とを、緩衝層の上から溶融溶接して接合する溶接工程（Ｓ１２）と、を備える。【選択図】図１