Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/191029
Kind Code:
A1
Abstract:
This grain-oriented electrical steel sheet is characterized in that: the chemical composition of a base material steel sheet comprises, in mass%, Si: 2.5 to 4.5%, Mn: 0.01 to 1.00%, N: ≤ 0.01%, C: ≤ 0.01%, sol.Al: ≤ 0.01%, S: ≤ 0.01%, Se: ≤ 0.01%, P: 0.00 to 0.05%, Sb: 0.00 to 0.50%, Sn: 0.00 to 0.30%, Cr: 0.00 to 0.50%, Cu: 0.00 to 0.50%, Ni: 0.00 to 0.50%, and Bi: 0.0000 to 0.0100%, the remainder being Fe and impurities; a magnetic flux density B8 in a rolling direction of the grain-oriented electrical steel sheet is more than or equal to 1.93 T; in a direction intersecting the rolling direction of the grain-oriented electrical steel sheet, deformed regions that extend across the entire width of the grain-oriented electrical steel sheet are periodically formed at an interval L of 3-30 mm; the deformed regions have a width W of 0.2-30.6 mm; and a protruding portion having a maximum height Dprotrusion of 1-5 μm is formed on one surface of the deformed regions, and a recess portion having a maximum depth Drecess of 1-4 μm is formed on the opposite surface.
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Inventors:
ATSUMI HARUHIKO (JP)
YAMAGATA RYUTARO (JP)
KATAOKA TAKASHI (JP)
HIRAYAMA TAKAAKI (JP)
YAMAGATA RYUTARO (JP)
KATAOKA TAKASHI (JP)
HIRAYAMA TAKAAKI (JP)
Application Number:
PCT/JP2023/013466
Publication Date:
October 05, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147
Foreign References:
| JPH04224629A | 1992-08-13 | |||
| JPH0347975A | 1991-02-28 | |||
| JP2011208196A | 2011-10-20 | |||
| JPH06212274A | 1994-08-02 | |||
| JPS61139624A | 1986-06-26 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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