Grain-oriented electrical steel sheet and method for producing same
US-2015034211-A1 · Feb 5, 2015 · US
Grain-oriented electrical steel sheet and method for manufacturing same
US10147527B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10147527-B2 |
| Application number | US-201214367273-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 28, 2012 |
| Priority date | Dec 28, 2011 |
| Publication date | Dec 4, 2018 |
| Grant date | Dec 4, 2018 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A grain-oriented electrical steel sheet exhibits reduced iron loss and reduced noise. The electrical steel sheet has magnetic domains refined by regions with a high lattice defect density being locally formed on the surface of or within the steel sheet, in which the regions with a high lattice defect density has a hardness, as measured by a micro Vickers hardness meter, equal to or lower than that of other regions.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing a grain-oriented electrical steel sheet comprising magnetic domains refined by lattice defect regions being locally formed on a surface of or within the steel sheet by irradiating the steel sheet with a heat beam, a light beam or a particle beam, wherein the lattice defect regions have a hardness, as measured by a micro Vickers hardness meter, equal to or lower than that of other regions, the method comprising: selecting a steel sheet having a ratio of hysteresis loss to total iron loss of less than 45% by screening, and irradiating the steel sheet with a heat beam, a light beam or a particle beam, in a direction forming an angle of 30° or less with a direction orthogonal to a rolling direction, at periodic intervals of 10 mm or less in the rolling direction. 2. The method according to claim 1 , wherein irradiating with the particle beam is irradiating with charged particles smaller in mass than Fe. 3. The method according to claim 2 , wherein the irradiating with a heat beam, a light beam, or a particle beam is performed under a condition in which the beam is scanned over an irradiation portion on the steel sheet at an average rate of 30 m/s or lower. 4. The method according to claim 1 , wherein the irradiating with a heat beam, a light beam, or a particle beam is performed under a condition in which the beam is scanned over an irradiation portion on the steel sheet at an average rate of 30 m/s or lower.
Assignees
Inventors
Classifications
containing manganese · CPC title
Electric or electronic devices · CPC title
specially adapted for particular articles or work · CPC title
- H01F1/14775Primary
in the form of sheets · CPC title
for manufacturing cores, coils, or magnets (H01F41/14 takes precedence; for dynamo-electric machines H02K15/00) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10147527B2 cover?
- A grain-oriented electrical steel sheet exhibits reduced iron loss and reduced noise. The electrical steel sheet has magnetic domains refined by regions with a high lattice defect density being locally formed on the surface of or within the steel sheet, in which the regions with a high lattice defect density has a hardness, as measured by a micro Vickers hardness meter, equal to or lower than t…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/14775. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 04 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).