Grain-oriented electrical steel sheet having high tensile strength insulating film and method of treatment of such insulating film
US7998284B2 · kind B2 · utility
4Cited by
4References
7Claims
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Key dates
| Filing date | May 18, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Dec 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/147
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Grain-oriented electrical steel sheet having a chrome-free high tensile strength insulating film characterized by comprising steel sheet on the surface of which is formed an insulating film containing a phosphate and colloidal silica as main ingredients and containing crystalline magnesium phosphate uniformly dispersed over the entire surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.