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Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/054409
Kind Code:
A1
Abstract:
[Problem] To provide a grain-oriented electromagnetic steel sheet which is further improved in terms of iron loss before magnetic domain control, while achieving a sufficient iron loss improvement effect even in the control of a heat-resistant magnetic domain where a sufficient iron loss improvement effect has not been achieved. [Solution] A grain-oriented electromagnetic steel sheet according to one aspect of the present invention comprises a base steel sheet and a glass coating film that is formed on the surface of the base steel sheet, and is characterized in that: the base steel sheet contains as chemical components, in mass%, 0.010% or less of C, from 2.00% to 4.00% of Si, from 0.05% to 1.00% of Mn, from 0.010% to 0.065% of Al, 0.004% or less of N and 0.010% or less of S, with the balance being made up of Fe and impurities; the oxygen concentration in the glass coating film and the base steel sheet is 2,500 ppm or less; and if IAl_1 is the first peak intensity of Al and IAl_2 is the second peak intensity of Al in the concentration profile of Al, the relationship of mathematical formula (1) is satisfied. Formula (1): IAl_1 < IAl_2

Inventors:
YASUDA MASATO (JP)
ARAMAKI TAKEO (JP)
YANO SHINYA (JP)
ARITA YOSHIHIRO (JP)
KATAOKA TAKASHI (JP)
MURAKAMI KENICHI (JP)
Application Number:
PCT/JP2020/035339
Publication Date:
March 25, 2021
Filing Date:
September 17, 2020
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/06; H01F1/147; C21D8/12; C22C38/60
Domestic Patent References:
WO2008062853A12008-05-29
WO2019151397A12019-08-08
Foreign References:
JP2018066061A2018-04-26
JPH0617261A1994-01-25
KR20180072465A2018-06-29
KR20180072487A2018-06-29
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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