METHOD FOR MAKING TUBULAR ADAPTERS OF ZIRCONIUM AND STEEL SLEEVES

摘要

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.