Method of making non-oriented silicon steel sheets having excellent magnetic properties
US5009726A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Oct 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1261
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is to produce non-oriented silicon steel sheets having excellent magnetic properties in dependence upon a hot direct rolling, wherein the slab is directly sent to the direct rolling without maintaining the heat and soaking, whereby others than AlN precipitated during hot rolling check the precipitation of AlN, and a delay time is taken between the roughing and the finish rolling so that precipitating nuclei of AlN are introduced into the steel, and uniform and coarse AlN precipitation is formed by a subsequent annealing treatment, thereby to enable to provide uniform and satisfied ferrite grain growth at the recrystallization annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.