Process of rolling iron-silicon strip material
US4291558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jul 27, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1266
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved method is provided for reducing hot rolled band to final gage iron-silicon alloy steel strip material while retaining the magnetic properties of the strip material. In this method, the hot rolled band is passed through an intermediate and a final cold rolling operation to accomplish progressive reduction prior to final annealing of the material. The improvement of the present invention comprises heating the material between the intermediate and final cold rolling operations to a temperature and for a time of at least that necessary to recover the cold rolled structure and to relieve residual stresses in the intermediate cold rolled material and less than that at which grains of the material begin to recrystallize.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.