Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/145317
Kind Code:
A1
Abstract:
Provided are a grain-oriented electrical steel sheet having an aluminum borate coating film whereby greater tension can be applied than in the prior art, and a method for manufacturing a grain-oriented electrical steel sheet. A grain-oriented electrical steel sheet pertaining to the present invention has a steel sheet, and an insulation coating film comprising an oxide including aluminum and boron, provided on the steel sheet, the oxide including a crystalline oxide, and the maximum value of the light emission intensity ratio of boron to aluminum at the boundary between the insulation coating film and the steel sheet, measured by glow discharge emission spectroscopy, being 2.5 to 4.0 times the light emission intensity ratio of boron to aluminum in the insulation coating film.
Inventors:
TAKAHASHI FUMIAKI (JP)
Application Number:
PCT/JP2020/000341
Publication Date:
July 16, 2020
Filing Date:
January 08, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C22/00; C21D9/46; C22C38/00; C23C26/00; H01F1/147; C22C38/02
Foreign References:
| JPH09272983A | 1997-10-21 | |||
| JP2001152354A | 2001-06-05 | |||
| JP2002309381A | 2002-10-23 | |||
| JP2019137874A | 2019-08-22 | |||
| JPS5518566A | 1980-02-08 | |||
| JPS6286175A | 1987-04-20 | |||
| JPS4839338A | 1973-06-09 | |||
| JPH0665754A | 1994-03-08 |
Other References:
See also references of EP 3910093A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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