Grain-oriented electrical steel sheet and producing method therefor
US8268097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Mar 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14725
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A grain-oriented electrical steel sheet has a tension film that does not include chromium. In the present invention, the tension film, including a phosphate and silica as constituents, includes a manganese compound and a potassium compound. The mole ratio K/Mn of potassium to manganese in the film is set to a certain range. The film can be produced by preparing a coating solution by adding a compound, which includes the phosphate and the silica and also includes the potassium and the manganese, and applying the coating solution on a grain-oriented electrical steel sheet after final annealing is completed, followed by drying and baking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.