Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/149248
Kind Code:
A1
Abstract:
Provided is a non-oriented electromagnetic steel sheet that offers low high-frequency iron loss without the addition of a large amount of an alloy element such as Cr for reducing magnetic flux density and without reducing the sheet thickness and thereby decreasing productivity. The non-oriented electromagnetic steel sheet has a predetermined component composition including 0.0005-0.0050 mass% of Co, the amount of N present as AlN in at least one surface in the range from the surface to a depth of 1/20 of the sheet thickness is 0.003 mass% or less, and the surface includes an oxide layer that contains one or both of Al and Si and has a thickness of 80-200 nm.
Inventors:
ZAIZEN YOSHIAKI (JP)
NISHIYAMA TAKESHI (JP)
NAKAGAWA NOBUKO (JP)
OKUBO TOMOYUKI (JP)
AOYAMA TOMOHIRO (JP)
NISHIYAMA TAKESHI (JP)
NAKAGAWA NOBUKO (JP)
OKUBO TOMOYUKI (JP)
AOYAMA TOMOHIRO (JP)
Application Number:
PCT/JP2023/001792
Publication Date:
August 10, 2023
Filing Date:
January 20, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/14; C22C38/60; H01F1/147
Domestic Patent References:
| WO2020136993A1 | 2020-07-02 | |||
| WO2020262063A1 | 2020-12-30 |
Foreign References:
| KR20210080657A | 2021-07-01 | |||
| JP2006241563A | 2006-09-14 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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