Electrical steel sheet and method for manufacturing same
US-12163066-B2 · Dec 10, 2024 · US
Grain oriented electrical steel sheet and method for manufacturing the same
US9406437B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9406437-B2 |
| Application number | US-201113814532-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 5, 2011 |
| Priority date | Aug 6, 2010 |
| Publication date | Aug 2, 2016 |
| Grant date | Aug 2, 2016 |
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- Title
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Abstract
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A grain oriented electrical steel sheet has thickness of forsterite film at bottom portions of grooves formed on a surface of the steel sheet is ≧0.3 μm, groove frequency is ≦20%, abundance ratio of grooves crystal grains directly beneath themselves, each crystal grain having orientation deviating from Goss orientation by ≧10° and grain size ≧5 μm, total tension exerted on the steel sheet in the rolling direction by the forsterite film and tension coating is ≧10.0 MPa, total tension exerted on the steel sheet in a direction perpendicular to the rolling direction by the forsterite film and tension coating is ≧5.0 MPa and total tension satisfies 1.0≦A/B≦5.0, where A is total tension exerted in rolling direction by forsterite film and tension coating, and B is total tension exerted in direction perpendicular to rolling direction by forsterite film and tension coating.
First claim
Opening claim text (preview).
The invention claimed is: 1. A grain oriented electrical steel sheet comprising: a forsterite film, tension coating on a surface of the steel sheet; and grooves for magnetic domain refinement on the surface of the steel sheet, wherein 1) a thickness of the forsterite film at bottom portions of the grooves is 0.3 μm or more, 2) groove frequency is 20% or less, the groove frequency being a ratio of the number of grooves, each groove having crystal grains directly beneath itself, each crystal grain having an orientation deviating from a Goss orientation by 10° or more and a grain size of 5 μm or more to the number of all grooves, and 3) total tension exerted on the steel sheet in a rolling direction by the forsterite film and the tension coating is 10.0 MPa or more, a total tension exerted on the steel sheet in a direction perpendicular to the rolling direction by the forsterite film and the tension coating is 5.0 MPa or more, and total tensions satisfy: 1.0≦ A/B≦ 5.0, where A is total tension exerted in the rolling direction by the forsterite film and the tension coating, and B is total tension exerted in a direction perpendicular to the rolling direction by the forsterite film and the tension coating.
Assignees
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Classifications
- H01F1/18Primary
with insulating coating · CPC title
Rolling special iron alloys {, e.g. stainless steel} · CPC title
Composite web or sheet · CPC title
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title
Application of a separating or insulating coating · CPC title
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- What does patent US9406437B2 cover?
- A grain oriented electrical steel sheet has thickness of forsterite film at bottom portions of grooves formed on a surface of the steel sheet is ≧0.3 μm, groove frequency is ≦20%, abundance ratio of grooves crystal grains directly beneath themselves, each crystal grain having orientation deviating from Goss orientation by ≧10° and grain size ≧5 μm, total tension exerted on the steel sheet in th…
- Who is the assignee on this patent?
- Omura Takeshi, Inoue Hirotaka, Yamaguchi Hiroi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H01F1/18. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 02 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).