Grain-oriented electrical steel sheet having insulating film not containing chromium and insulating film agent of same
US7850792B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 14, 2005 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a grain-oriented electrical steel sheet product having a superior corrosion resistance, annealing resistance, film tension, and the like in insulating treatment based on a phosphate not containing chromium and a treatment agent for the same, so provides grain-oriented electrical steel sheet having an insulating film not containing chromium characterized by the insulating film containing a phosphate and one or more compounds selected from inorganic compounds of Fe, Ni, Co, Cu, Sr, and Mo in an amount, as metal elements, of 0.06 to 2.10 moles per mole of phosphate, and an insulating film agent of the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.