Grain oriented electrical steel sheet and method for manufacturing the same
US9396872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2011 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Jul 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A grain oriented electrical steel sheet may reduce iron loss of material with linear grooves formed thereon for magnetic domain refinement and offer excellent low iron loss properties when assembled as an actual transformer, where the steel sheet has sheet thickness of 0.30 mm or less, linear grooves are formed at intervals of 2-10 mm in the rolling direction, the depth of each of the linear grooves is 10 μm or more, the thickness of the forsterite film at bottom portions of the linear grooves is 0.3 μm or more, total tension applied to the steel sheet by the forsterite film and tension coating is 10.0 MPa or higher in rolling direction, and the proportion of eddy current loss in iron loss W17/50 of the steel sheet is 65% or less when alternating magnetic field of 1.7 T and 50 Hz is applied to the steel sheet in the rolling direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.