Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/149329
Kind Code:
A1
Abstract:
A grain-oriented electromagnetic steel sheet is not provided with a mineral-based coating film containing forsterite as the main component, and comprises a base steel sheet containing specified chemical components, a silica-containing oxide layer arranged on the base steel sheet, an iron-based oxide layer arranged on the silica-containing oxide layer, and a tension-imparting insulation coating film arranged on the iron-based oxide layer, having a thickness of 1 to 3 μm, and containing a phosphate salt and colloidal silica as the main components. When elemental analysis is carried out in the thickness direction from the surface of the tension-imparting insulation coating film by glow discharge optical emission spectrometry, a specific requirement is satisfied.
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Inventors:
TAKEDA KAZUTOSHI (JP)
TANAKA ICHIRO (JP)
SUENAGA TOMOYA (JP)
KATAOKA TAKASHI (JP)
KUNITA YUKI (JP)
TANAKA ICHIRO (JP)
SUENAGA TOMOYA (JP)
KATAOKA TAKASHI (JP)
KUNITA YUKI (JP)
Application Number:
PCT/JP2020/001157
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 | |||
| JP2019005239A | 2019-01-17 | |||
| JPS4839338A | 1973-06-09 | |||
| JPS5826405B2 | 1983-06-02 | |||
| JPS4996920A | 1974-09-13 | |||
| JPH0754155A | 1995-02-28 | |||
| JP4041289B2 | 2008-01-30 | |||
| JP4300604B2 | 2009-07-22 |
Other References:
See also references of EP 3913107A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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