Process for the manufacture of a rough-shaped, cold-rolled cladding tube of zirconium alloy
US4764223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1985 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Aug 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S376/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the manufacture of a rough-shaped, cold-rolled cladding tube of "Zircaloy 2" or "Zircaloy 4", in which PA1 (a) an ingot of the alloy is transformed by hot working and the bar obtained is cut up into billets, PA1 (b) the bar or the billet is then immersed from the .beta. range, PA1 (c) at least one billet which has thus been immersed is extruded in the .alpha. range, PA1 (d) the rough shape extruded is cold-rolled and heat-treated to give rise to a cold-rolled, rough-shaped cladding tube, PA1 wherein the hot working is first carried out in the .beta. range with a cross-sectional reduction ratio of at least 1.5 and then in the .alpha. range with a cross-sectional reduction ratio of at least 3, is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.