Method of producing silicon steel hot rolled sheets having excellent surface properties
US5572892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1994 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Aug 25, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1277
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a production method for silicon steel hot rolled sheets by subjecting a slab of silicon steel to a rough hot rolling through high-temperature heating and then subjecting to a finish hot rolling, rolling at the first stand in the finish hot rolling is carried out so that a relation of thickness at entrance side of the stand t.sub.F1 (mm), thickness at delivery side thereof t.sub.F2 (mm), surface temperature of steel sheet at gripping T.sub.F0 (.degree. C.) and temperature at the depth of (t.sub.F1 -t.sub.F2)/2 (mm) from the surface of the steel sheet at gripping T.sub.F1 satisfies the following equation: EQU (T.sub.F1 -T.sub.F0)/{(t.sub.F1 -t.sub.F2)/2}.ltoreq.10+t.sub.F1 /10 (.degree.C./mm). Thus, surface defect and surface cracks can be prevented in the hot rolling to provide silicon steel sheets having excellent surface properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.