Grain-oriented electrical steel sheet excellent in coating adhesion and method of producing the same
US7942982B2 · kind B2 · utility
7Cited by
2References
6Claims
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Key dates
| Filing date | Nov 15, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Nov 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14775
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Grain-oriented electrical steel sheet excellent in coating adhesion is provided. The steel sheet contains Si: 2 to 7% mass % and has a primary coating composed mainly of forsterite on its surface. A compound (A) containing one or more elements selected from among Ca, Sr and Ba, at least one rare earth metal, and sulfur is incorporated in the primary coating so as to reside in the interface layer between the primary coating and the steel sheet. As a result, occurrence of primary coating exfoliation at regions that are strongly worked during manufacture of a wound core transformer or the like is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.