Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/204269
Kind Code:
A1
Abstract:
This grain-oriented electromagnetic steel sheet is provided with a base steel sheet and an insulating coating film arranged on the base steel sheet in contact with the base steel sheet. When a cross-sectional surface of the grain-oriented electromagnetic steel sheet which is cut in a direction parallel with the thickness direction and perpendicular to the width direction is observed, the base steel sheet has an internal oxidation SiO2 in a boundary region with the insulating coating film, the insulating coating film has voids and an oxide containing iron and phosphorus, the area ratio of the voids relative to the area of the boundary region with the insulating coating film is 0.010 to 3.0%, and the area ratio of the oxide containing iron and phosphorus relative to the area of the insulating coating film is 0.10 to 5.0%.
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Inventors:
KIKUZUKI MAYUKO (JP)
KATAOKA TAKASHI (JP)
TAKEDA KAZUTOSHI (JP)
TANIGUCHI SHUNSUKE (JP)
KATAOKA TAKASHI (JP)
TAKEDA KAZUTOSHI (JP)
TANIGUCHI SHUNSUKE (JP)
Application Number:
PCT/JP2023/015749
Publication Date:
October 26, 2023
Filing Date:
April 20, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/04; C22C38/60; C23C22/00; H01F1/147
Foreign References:
| JPS60131976A | 1985-07-13 | |||
| JPH07278833A | 1995-10-24 | |||
| JP2020111816A | 2020-07-27 | |||
| JP2000038615A | 2000-02-08 | |||
| CN112646966A | 2021-04-13 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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