Patent ID: 11946130
Assignee: JOINT-STOCK COMPANY “TVEL”
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  G  Y | IPC B  C

Claim 0:
1. The method of manufacturing zirconium alloy tubular products from zirconium alloy ingot containing (% wt.): niobium—0.9-1.7; iron—0.04-0.10; oxygen—0.03-0.10; silicon—less than 0.02, carbon—less than 0.02, zirconium—all the rest, including the ingot melting by multiple vacuum arc remelting, mechanical processing of the ingot, heating, hot working of the ingot and subsequent mechanical processing for production of the tubular billets, heat treatment of tubular billets, application of a protective coating on the tubular billets to protect against gas saturation during heating and hot pressing and heating of the tubular billets to the hot pressing temperature, hot pressing, removal of the protective coating, multi-stage cold radial forging, vacuum thermal treatment, multiple cold rolling with the total deformation degree of 50-80% per a run and the tubular coefficient of Q=1.0-2.7 with intermediate vacuum thermal treatment after each cold rolling operation, and final vacuum thermal treatment of the tubular products is carried out at the final size with subsequent final finishing operations.