US11072861B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11072861-B2 |
| Application number | US-201615758829-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 28, 2016 |
| Priority date | Sep 29, 2015 |
| Publication date | Jul 27, 2021 |
| Grant date | Jul 27, 2021 |
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
What the patent document calls the invention.
A short plain-language summary of the technical disclosure.
Who owns or filed the patent and who is credited as inventor.
Filing, priority, publication, and grant dates set the timeline.
The legal scope of protection — read this for what is actually claimed.
Technology tags used to group this patent with similar filings.
Prior art links and similar publications in this corpus.
Official abstract text for this publication.
A grain-oriented electrical steel sheet according to one embodiment of the present invention includes a steel sheet and an insulation coating, in which the insulation coating contains a first metal phosphate, which is a metal phosphate of one or two more metals selected from Al, Fe, Mg, Mn, Ni, and Zn; a second metal phosphate, which is a metal phosphate of one or two more metals selected from Co, Mo, V, W, and Zr; and colloidal silica, the insulation coating does not contain chromate, and an elution amount of phosphoric acid of the insulation coating as determined by boiling the grain-oriented electrical steel sheet in a boiled pure water for 10 minutes, then measuring an elution amount of phosphoric acid into the pure water, and dividing the amount of phosphoric acid by the area of the insulation coating of the boiled grain-oriented electrical steel sheet is 30 mg/m2 or less.
Opening claim text (preview).
The invention claimed is: 1. A grain-oriented electrical steel sheet comprising: a steel sheet; and an insulation coating, wherein the insulation coating contains a first metal phosphate which is a metal phosphate of one or more metals selected from Al, Fe, Mg, Mn, Ni, and Zn, a second metal phosphate which is a metal phosphate of one or more metals selected from Co, Mo, V, W, and Zr, and colloidal silica, the insulation coating does not contain chromate, and an elution amount of phosphoric acid of the insulation coating as determined by boiling the grain-oriented electrical steel sheet in a boiled pure water for 10 minutes, then measuring an amount of phosphoric acid eluted into the pure water, and dividing the amount of phosphoric acid by the area of the insulation coating of the boiled grain-oriented electrical steel sheet is 30 mg/m 2 or less. 2. The grain-oriented electrical steel sheet according to claim 1 , wherein the first metal phosphate is the metal phosphate of the one or more metals selected from Al, Mg, Ni, and Zn. 3. The grain-oriented electrical steel sheet according to claim 1 , wherein the second metal phosphate is the metal phosphate of the one or more metals selected from V, W, and Zr. 4. The grain-oriented electrical steel sheet according to claim 1 , wherein a second metal phosphate content is 0.5 to 10.0 mass % with respect to a total mass of the insulation coating. 5. The grain-oriented electrical steel sheet according to claim 1 , wherein a colloidal silica content is 25 to 55 mass % in terms of solid content with respect to the total mass of the insulation coating. 6. The grain-oriented electrical steel sheet according to claim 1 , wherein an average primary grain size of the colloidal silica is 7 to 30 nm. 7. The grain-oriented electrical steel sheet according to claim 1 , wherein a coating amount of the insulation coating is 2.0 to 7.0 g/m 2 . 8. The grain-oriented electrical steel sheet according to claim 1 , wherein the insulation coating includes at least one selected from the group consisting of boric acid, sodium borate, titanium oxide, molybdenum oxide, a pigment, and barium titanate. 9. The grain-oriented electrical steel sheet according to claim 1 , wherein the steel sheet includes, by unit mass %, C: 0.005% or less, Si: 2.5 to 7.0%, Mn: 0 to 1.0%, Al: 0 to 0.03%, N: 0.01% or less, P: 0.01% or less, S: 0.01% or less, and a remainder consisting of Fe and impurities, an average grain size of the steel sheet is 1 to 10 mm, and an angle formed between a crystal orientation of (110)[001] and a rolling direction of the steel sheet is 8° or less on average.
with insulating coating · CPC title
containing phosphates · CPC title
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals · CPC title
containing aluminium · CPC title
containing silicon · CPC title
Related publications grouped by family.
Answers are generated from the same data shown on this page.