Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/132198
Kind Code:
A1
Abstract:
The present invention achieves low iron loss and high magnetic flux density in a Si-gradient magnetic material. A multilayered electromagnetic steel sheet having a layered structure of an inner layer section and surface layer sections that are positioned on opposite sides of the inner layer section, wherein: the surface layer sections and the inner layer section have prescribed component compositions; ΔSi is 0.1-0.5 mass%, where ΔSi is defined as the difference ([Si]1–[Si]0) between the Si content [Si]1 in the surface layer sections and the Si content [Si]0 in the inner layer section; the ratio (t1/t) of the total thickness t1 of the surface layer sections to the sheet thickness t of the electromagnetic steel sheet is 0.04-0.78; the ratio (B50/Bs) of the saturation magnetization Bs and the magnetic flux density B50 at a magnetic field strength of 5000 A/m is 0.825 or greater; and the sheet thickness t and the iron loss W10/800 at a frequency of 800 Hz and a maximum magnetic flux density of 1.0 T satisfy the expression W10/800≤13+80×t.
Inventors:
ZAIZEN YOSHIAKI (JP)
MIYAMOTO YUKINO (JP)
ODA YOSHIHIKO (JP)
OKUBO TOMOYUKI (JP)
YOSHIZAKI SOUICHIRO (JP)
MIYAMOTO YUKINO (JP)
ODA YOSHIHIKO (JP)
OKUBO TOMOYUKI (JP)
YOSHIZAKI SOUICHIRO (JP)
Application Number:
PCT/JP2022/046098
Publication Date:
July 13, 2023
Filing Date:
December 14, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147
Domestic Patent References:
| WO2019117095A1 | 2019-06-20 | |||
| WO2021065555A1 | 2021-04-08 |
Foreign References:
| JP2010132938A | 2010-06-17 | |||
| JP2020190026A | 2020-11-26 | |||
| KR20210080726A | 2021-07-01 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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