Manufacturing Method for Zirconium Alloy Tubular Products

Abstract

Manufacturing method for zirconium alloy tubular products containing (% wt.): niobium—0.9-1.7; iron—0.10-0.20; oxygen—0.10-0.20; silicon—less than 0.02, carbon—less than 0.02, zirconium—the alloy base. The method includes melting an ingot by multiple vacuum arc remelting, mechanical processing of the ingot, heating, multi-stage hot forging for production of the forged piece, subsequent mechanical processing of the forged piece for production of tubular billets with vacuum thermal treatment, application of a protective coating, heating to a hot pressing temperature, hot pressing, removal of the protective coating, vacuum thermal treatment, multiple cold rolling steps with a total deformation degree of 58-74% per run and a tubular coefficient of Q=1.18-2.01, with intermediate vacuum thermal treatment in order to produce tubular products, and final vacuum thermal treatment being carried out at the final size with subsequent final finishing operations.

Dependencies are inferred from the claim text.