Title:
METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/149351
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 a mixed gas and the temperature and annealing in a smoothing step, and controlling the baking temperature and the heat treatment temperature in an insulating coating film formation step.
Inventors:
TAKATANI SHINSUKE (JP)
USHIGAMI YOSHIYUKI (JP)
USHIGAMI YOSHIYUKI (JP)
Application Number:
PCT/JP2020/001198
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:
| WO2002088403A1 | 2002-11-07 |
Foreign References:
| JPH10130727A | 1998-05-19 | |||
| JPH08269573A | 1996-10-15 | |||
| JPH04232212A | 1992-08-20 | |||
| JPH05279864A | 1993-10-26 | |||
| JPH11199939A | 1999-07-27 | |||
| JP2019005133A | 2019-01-17 | |||
| JPS4996920A | 1974-09-13 |
Other References:
See also references of EP 3913096A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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