Grain-oriented electromagnetic steel sheet with excellent coating properties and process for its manufacture
US6461741B1 · kind B1 · utility
4Cited by
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11Claims
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Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Sep 23, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high permeability grain-oriented electromagnetic steel sheet with a higher tension-imparting effect and more excellent cohesion and magnetic properties compared to the prior art, which also maintains sufficient corrosion resistance to withstand practical use; the grain-oriented electromagnetic steel sheet has on its surface an insulation coating comprising a first layer composed mainly of a divalent or trivalent metal hydrogen phosphate salt and silica, and a second layer composed mainly of aluminum borate and leaving a surface roughness of 0.1 &mgr;m-0.35 &mgr;m in terms of Ra (center like average roughness).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.