Title:
METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/149346
Kind Code:
A1
Abstract:
This method of manufacturing a grain-oriented electrical steel sheet involves controlling the degree of oxidation (PH2O/PH2) in a decarburization annealing step, controlling the volume ratio of hydrogen in a mixed gas atmosphere to 50% or greater in a final annealing step, washing using a solution to which an inhibitor has been added in an annealing separator removal step, controlling the average roughness Ra by means of chemical polishing in a smoothing step, and using a coating film formation solution that includes a crystalline phosphide in an insulating coating film formation step.
Inventors:
TAKATANI SHINSUKE (JP)
USHIGAMI YOSHIYUKI (JP)
USHIGAMI YOSHIYUKI (JP)
Application Number:
PCT/JP2020/001192
Publication Date:
July 23, 2020
Filing Date:
January 16, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/60; C23C22/00; H01F1/147
Domestic Patent References:
WO2019013351A1 | 2019-01-17 | |||
WO2002088403A1 | 2002-11-07 |
Foreign References:
JPH10130727A | 1998-05-19 | |||
JPH08269573A | 1996-10-15 | |||
JP2002206172A | 2002-07-26 | |||
JPH05279864A | 1993-10-26 | |||
JP2019005204A | 2019-01-17 | |||
JPS4996920A | 1974-09-13 |
Other References:
See also references of EP 3913087A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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