METHOD FOR MAKING TUBULAR ADAPTERS OF ZIRCONIUM AND STEEL SLEEVES

FIELD: processes and equipment for diffusion welding of tubular adapters of zirconium and steel sleeves. ^ SUBSTANCE: method comprises steps of placing sleeve of zirconium alloy inside steel sleeve and heating them in vacuum till diffusion welding temperature; then compressing welded surfaces due to...

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Bibliographische Detailangaben
Hauptverfasser:	TJURIN V.N, SEMENOV A.N, SHEVELEV G.N
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	FIELD: processes and equipment for diffusion welding of tubular adapters of zirconium and steel sleeves. ^ SUBSTANCE: method comprises steps of placing sleeve of zirconium alloy inside steel sleeve and heating them in vacuum till diffusion welding temperature; then compressing welded surfaces due to expanding zirconium sleeve by means of roller expander; after diffusion welding cooling adapter in temperature range in which zirconium alloy has no phase containing alpha-zirconium and beta-zirconium; subjecting zirconium sleeve to hot deformation by depth no less than 0.5 mm at reduction degree no less than 10%; cooling adapter till temperature range 540 - 580°C and keeping it in such temperature range no less than 30 min. ^ EFFECT: simplified method for making adapters having improved corrosion resistance in hot water and steam.