WELDING METHOD FOR INVAR

PROBLEM TO BE SOLVED: To provide a welding method for Invar, by which sufficient low-temperature toughness is secured while inhibiting a reheat crack from occurring in a weld zone. SOLUTION: Members consisting of Invar are mutually joined by conducting multi-layer welding of three layers or more thr...

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Bibliographische Detailangaben
Hauptverfasser:	SAKATA KENTARO, ENUMA KAZUYUKI, ARAKAWA TAKEKAZU, SEO NOBUTAKA, MURAKAMI YOSHIAKI, ARAI SHINGO
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a welding method for Invar, by which sufficient low-temperature toughness is secured while inhibiting a reheat crack from occurring in a weld zone. SOLUTION: Members consisting of Invar are mutually joined by conducting multi-layer welding of three layers or more through TIG welding method. When conducting the welding, the initial layer or the initial and 2nd layers are formed using a 1st similar-metal welding material containing more C and Nb than the member consisting of Invar, and the remaining layers are formed using a 2nd similar-metal welding material containing more C and Ta than the member consisting of Invar. COPYRIGHT: (C)2005,JPO&NCIPI