Process for the production of zirconium alloy sheet metal having good resistance to nodular corrosion and to deformation under irradiation
US5674330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Aug 14, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/186
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the fabrication of zirconium alloy sheet specifically intended for the manufacture of structural elements for boiling water reactors, which includes the following steps: PA1 a) producing in a vacuum an ingot having the composition of the desired alloy; PA1 b) forging and hot rolling the ingot; PA1 c) quenching of the blank thus obtained after reheating in the beta range; PA1 d) hot rolling after heating; PA1 e) heat treatment in the alpha range; PA1 f) at least one cycle of cold rolling followed by a heat treating in the alpha range; and PA1 g) final cold rolling followed by subcritical annealing in the alpha range; where the hot rolling of the sheet after quenching from the beta range is carried out in an initial direction, then in a direction perpendicular to the initial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.