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Title:
METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/149330
Kind Code:
A1
Abstract:
A method for manufacturing a grain-oriented electromagnetic steel sheet is characterized by comprising a distortion region formation step of irradiating a grain-oriented electromagnetic steel sheet comprising a matrix steel sheet (1), an intermediate layer (4) arranged on the matrix steel sheet (1) so as to be in contact with the matrix steel sheet (1), and an insulation coating film (3) arranged on the intermediate layer (4) so as to be in contact with the intermediate layer (4) with electron beam to form, on the surface of the matrix steel sheet (1), a distortion region D that extends in a direction orthogonal to the rolling direction of the matrix steel sheet 1, wherein, in the distortion region formation step, a center part of the distortion region D as observed in the rolling direction of the matrix steel sheet 1 and the direction of the extension of the distortion region D is heated to 800 to 2000°C inclusive.

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Inventors:
ARAI SATOSHI (JP)
USHIGAMI YOSHIYUKI (JP)
HAMAMURA HIDEYUKI (JP)
YAMAMOTO SHINJI (JP)
OKUMURA SHUNSUKE (JP)
Application Number:
PCT/JP2020/001161
Publication Date:
July 23, 2020
Filing Date:
January 16, 2020
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/60; C23C22/00; H01F1/147
Foreign References:
JPS63186826A1988-08-02
JP2012035288A2012-02-23
JP2002302774A2002-10-18
JPH0978253A1997-03-25
EP0611829A11994-08-24
JP2019005059A2019-01-17
JPS4996920A1974-09-13
JP2001220683A2001-08-14
JP2003193251A2003-07-09
JP2003193252A2003-07-09
Other References:
See also references of EP 3913088A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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