Production of a strip of zircaloy 2 or zircaloy 4 in partially recrystallized state
US4775428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/186
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a process for the production of a strip of Zircaloy 2 or 4 with an oxygen content of between 900 and 1600 ppm and with mechanical characteristics corresponding to the following three conditions: PA0 E.sub.0.2 at 315.degree.C..gtoreq.250 MPa PA0 `long` uniform A % at 20.degree.C..gtoreq.4 and PA0 `transverse` uniform A % at 20.degree. C..gtoreq.4, wherein, after hot working of an ingot to provide a billet, said billet is cold rolled to form a strip with intermediate annealing operations, characterized in that: PA1 (a) each of the last two intermediate annealing operations is a treatment of from 0.5 min to 10 min at between 750.degree. and 650.degree. C., PA1 (b) the final heat treatment following the last rolling operation is for from 1.5 to 7 min at between 630.degree. and 590.degree. C., and PA1 (c) the strip is rolled with particular degrees of deformation for each of the last three rolling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.