Grain-oriented electrical steel sheet and method of manufacturing the same
US10395806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2012 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Jul 22, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/26
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A grain-oriented electrical steel sheet, on which magnetic domain refining treatment by strain application has been performed, has an insulating coating with excellent insulation properties and corrosion resistance. In a grain-oriented electrical steel sheet, linear strain having been applied thereto by irradiation with a high-energy beam, the linear strain extending in a direction that intersects a rolling direction of the steel sheet, an area ratio of irradiation marks within an irradiation region of the high-energy beam is 2% or more and 20% or less, an area ratio of protrusions with a diameter of 1.5 μm or more within a surrounding portion of the irradiation mark is 60% or less, and an area ratio of exposed portions of steel substrate in the irradiation mark is 90% or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.