Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/149345
Kind Code:
A1
Abstract:
This grain-oriented electrical steel sheet does not have an inorganic coating having forsterite as a main component thereof, the grain-oriented electrical steel sheet being provided with a base steel sheet having a predetermined chemical composition, a silica-containing oxide layer provided on the base steel sheet, an iron-based oxide layer provided on the silica-containing oxide layer, and a tension-imparting insulating coating which is provided on the iron-based oxide layer and which has a thickness of 1-3 µm and has phosphate and colloidal silica as main components thereof. When elemental analysis by glow discharge emission spectrometry is performed in the sheet thickness direction from the surface of the tension-imparting insulating coating, the peak Si emission intensity satisfies a predetermined condition.
Inventors:
TAKEDA KAZUTOSHI (JP)
TANAKA ICHIRO (JP)
KATAOKA TAKASHI (JP)
SUENAGA TOMOYA (JP)
KUNITA YUKI (JP)
TANAKA ICHIRO (JP)
KATAOKA TAKASHI (JP)
SUENAGA TOMOYA (JP)
KUNITA YUKI (JP)
Application Number:
PCT/JP2020/001191
Publication Date:
July 23, 2020
Filing Date:
January 16, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C22/00; C21D8/12; C21D9/46; C22C38/00; C22C38/60; C23C22/08; C23C22/78; C23C28/04
Foreign References:
| JP2018062682A | 2018-04-19 | |||
| KR20150074860A | 2015-07-02 | |||
| JPH08191010A | 1996-07-23 | |||
| JP2002309380A | 2002-10-23 | |||
| JP2002249880A | 2002-09-06 | |||
| JP2019005238A | 2019-01-17 | |||
| JPS4839338A | 1973-06-09 | |||
| JPS5826405A | 1983-02-16 | |||
| JPS4996920A | 1974-09-13 | |||
| JPH0754155A | 1995-02-28 | |||
| JP4041289B2 | 2008-01-30 | |||
| JP4300604B2 | 2009-07-22 |
Other References:
See also references of EP 3913109A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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