Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/063163
Kind Code:
A1
Abstract:
This grain-oriented electrical steel sheet comprises a base steel sheet, a forsterite coating film formed on the surface of the base steel sheet, and an insulation film formed on the surface of the forsterite coating film, wherein: the chemical composition of the base steel sheet contains 0.80 to 7.00% by mass of Si; the area ratio of crystal grains having a distance in the rolling direction between crystal grain boundaries in the surface of the base steel sheet of 3.0 mm to 13.0 mm inclusive is 70% or more; B8 that is a magnetic flux density generated by a magnetic force of 800 A/m is 1.88 T or more; W17/50 that is an iron loss where the frequency is 50 Hz and the maximum magnetic flux density is 1.7 T is 13.1×t2-4.3×t+1.2 (W/kg) or less where the sheet thickness is t (mm); and LvA200Hz that is a 200 Hz component of a magnetostriction waveform is 60 to 78 dBA.
Inventors:
MOGI HISASHI (JP)
KAWAMURA YUSUKE (JP)
IWAKI MASATAKA (JP)
TAKAHASHI MASARU (JP)
KAWAMURA YUSUKE (JP)
IWAKI MASATAKA (JP)
TAKAHASHI MASARU (JP)
Application Number:
PCT/JP2023/034555
Publication Date:
March 28, 2024
Filing Date:
September 22, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/02; H01F1/147; C21D8/12; C22C38/06; C22C38/60
Domestic Patent References:
| WO2019189857A1 | 2019-10-03 | |||
| WO2020158732A1 | 2020-08-06 |
Foreign References:
| JP2021123755A | 2021-08-30 | |||
| JP2020169374A | 2020-10-15 | |||
| CN105220071A | 2016-01-06 | |||
| CN112159935A | 2021-01-01 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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