Electrical steel sheet having insulating coating
US12252792B2 · kind B2 · utility
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Key dates
| Filing date | Sep 26, 2019 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Sep 15, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An electrical steel sheet having excellent coating peel resistance that can be exhibited during a stamping process, so that sticking of the coating to a die is inhibited. The electrical steel sheet has an insulating coating disposed on at least one surface of the electrical steel sheet. The insulating coating (i) includes a composite comprising P and Al, (ii) has an aspect ratio in a range of 1 to 10, and (iii) has a thickness in a range of 500 nm to 2000 nm. The composite has a particle diameter in a range of 10 nm to 1000 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.