Grain oriented electrical steel sheet and method for manufacturing the same
US9536658B2 · kind B2 · utility
5Cited by
18References
2Claims
0Family size
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Key dates
| Filing date | Aug 3, 2011 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Aug 2, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2201/05
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A grain oriented electrical steel sheet that is subjected to magnetic domain refining treatment by electron beam irradiation and exhibits excellent low-noise properties when assembled as an actual transformer in which tension exerted on the steel sheet by the forsterite film is 2.0 MPa or higher both in a rolling direction and a direction transverse (perpendicular) to the rolling direction, and a ratio of an irradiation pitch in a thermal strain introduced region (B) to a spot diameter (A) on an electron beam irradiation surface satisfies 0.5≦B/A≦5.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.