Method for manufacturing grain-oriented silicon steel sheets with mirror-like surface
US7364629B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jan 7, 2003 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | May 20, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/76
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method for manufacturing grain-oriented silicon steel with mirror-like surface by applying an aqueous slurry of an annealing separator, magnetic properties are stabilized by controlling the amount of moisture, carried in the annealing separator consisting mainly of alumina after application and drying thereof, to not more than 1.5%, controlling the partial water vapor pressure during finish-annealing and eliminating the variation (instability) in secondary recrystallization caused by the inhibitor reaction at the interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.