Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2019/146697
Kind Code:
A1
Abstract:
This grain-oriented electrical steel sheet comprises a base material steel sheet, a glass coating formed on the base material steel sheet and in contact therewith, and an insulating coating formed on the glass coating and in contact therewith, said insulating coating having a phosphate and a colloidal silica as main constituents. The base material steel sheet contains a prescribed chemical component, and in the glass coating, BN having an average particle diameter of 50-300 nm is present at a prescribed number density within 5 μm from the interface between the glass coating and the base material steel sheet in the depth direction. When the light emission intensity of B is measured from a surface of the insulating film using glow-discharge optical emission spectroscopy, the light emission intensity of the B the interior of the glass coating is greater than the light emission intensity of the B in the interior of the base material steel sheet.
Inventors:
YASUDA MASATO (JP)
USHIGAMI YOSHIYUKI (JP)
TAKAHASHI MASARU (JP)
YANO SHINYA (JP)
USHIGAMI YOSHIYUKI (JP)
TAKAHASHI MASARU (JP)
YANO SHINYA (JP)
Application Number:
PCT/JP2019/002265
Publication Date:
August 01, 2019
Filing Date:
January 24, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/60; C23C8/26; C23C22/00; H01F1/147; C21D8/12; C21D9/46
Domestic Patent References:
WO2012096350A1 | 2012-07-19 | |||
WO2011007817A1 | 2011-01-20 | |||
WO2011007771A1 | 2011-01-20 | |||
WO2011007817A1 | 2011-01-20 | |||
WO2008062853A1 | 2008-05-29 |
Foreign References:
JP2004332071A | 2004-11-25 | |||
JP2012144777A | 2012-08-02 | |||
JPH11269544A | 1999-10-05 | |||
KR20120071825A | 2012-07-03 | |||
JP2018010301A | 2018-01-18 | |||
US3905842A | 1975-09-16 | |||
US3905843A | 1975-09-16 | |||
JPH01230721A | 1989-09-14 | |||
JPH01283324A | 1989-11-14 | |||
JPS63140243A | 1988-06-11 | |||
JP2004076146A | 2004-03-11 | |||
JP2012214902A | 2012-11-08 |
Other References:
See also references of EP 3744868A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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