Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND FORMATION METHOD FOR INSULATING COATING FILM
Document Type and Number:
WIPO Patent Application WO/2023/195517
Kind Code:
A1
Abstract:
This grain-oriented electrical steel sheet includes a parent material steel sheet and an insulating coating film that is formed on the surface of the parent material steel sheet. The insulating coating film includes an intermediate layer that is formed on the parent material steel sheet side and includes amorphous iron phosphate and a tension coating film layer that is formed on the surface side of the insulating coating film. The average thickness of the intermediate layer is 0.10–3.0 μm, and the tension coating film layer includes a metal phosphate and silica, the silica content of the tension coating film layer being 20–60 mass%.
Inventors:
TAKEDA KAZUTOSHI (JP)
KATAOKA TAKASHI (JP)
TAKATANI SHINSUKE (JP)
KOGAKURA YUUKI (JP)
KUNITA YUKI (JP)
KATAOKA TAKASHI (JP)
TAKATANI SHINSUKE (JP)
KOGAKURA YUUKI (JP)
KUNITA YUKI (JP)
Application Number:
PCT/JP2023/014239
Publication Date:
October 12, 2023
Filing Date:
April 06, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C23C22/00; C21D9/46; C22C38/00; C22C38/60
Domestic Patent References:
| WO2019155858A1 | 2019-08-15 | |||
| WO2020149351A1 | 2020-07-23 |
Foreign References:
| JP2020111814A | 2020-07-27 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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