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Coating liquid for forming insulation coating for grain-oriented electrical steel sheet, method of manufacturing grain-oriented electrical steel sheet, and grain-oriented electrical steel sheet
US12157921B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12157921-B2 |
| Application number | US-201916975668-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2019 |
| Priority date | Mar 28, 2018 |
| Publication date | Dec 3, 2024 |
| Grant date | Dec 3, 2024 |
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- Title
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Abstract
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In the present invention, there is provided a coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet, including: a solvent; and one or two more layered clay mineral powders having a specific surface area of 20 m 2 /g or more. In addition, in the present invention, there is provided a grain-oriented electrical steel sheet including: a base metal; and an insulation coating provided on a surface of the base metal, in which the insulation coating contains SiO 2 , and one or two of Al 2 O 3 and MgO, and has a porosity of 10% or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A grain-oriented electrical steel sheet comprising: a base metal; and an insulation coating provided on a surface of the base metal, wherein the insulation coating contains SiO 2 , and one or both of Al 2 O 3 and MgO, wherein the insulation coating has a porosity of 10% or less, wherein the composition of the insulation coating includes a dehydration product of a layered clay mineral having a specific surface area of 20 m 2 /g or more, and wherein the amount of P 2 O 5 in the insulation coating is 13 mass % or less. 2. The grain-oriented electrical steel sheet according to claim 1 , wherein the insulation coating further contains one or two or more selected from Fe 2 O 3 , Na 2 O, K 2 O, and P 2 O 5 . 3. The grain-oriented electrical steel sheet according to claim 1 , wherein an amount of a chromium compound of the insulation coating is 4 mass % or less with respect to a dehydration product of a layered clay mineral. 4. The grain-oriented electrical steel sheet according to claim 2 , wherein an amount of a chromium compound of the insulation coating is 4 mass % or less with respect to a dehydration product of a layered clay mineral.
Assignees
Inventors
Classifications
Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium · CPC title
Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title
Grain orientation · CPC title
- C21D8/1244Primary
characterised by the heat treatment · CPC title
Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title
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- What does patent US12157921B2 cover?
- In the present invention, there is provided a coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet, including: a solvent; and one or two more layered clay mineral powders having a specific surface area of 20 m 2 /g or more. In addition, in the present invention, there is provided a grain-oriented electrical steel sheet including: a base metal; and an insu…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C21D8/1244. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 03 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).