Method of making non-oriented electrical steel sheets
US5062906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1989 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Oct 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is to produce non-oriented electrical steel sheet by a hot direct rolling. The slab is directly sent to the hot rolling without the brief soaking, whereby others than AlN inevitably precipitated check the precipitation of AlN, a roughing and a finish rolling are performed at determined reduction rates, and a delay time is taken between the roughing and the finish rolling, and besides a finish rolling is performed at not more than Ar.sub.3 so that precipitating nuclei of AlN are effectively introduced into the steel, and uniform and coarse AlN precipitation is formed by a coiling at temperature of more than 700.degree. C., 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.