Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/149249
Kind Code:
A1
Abstract:
Provided is a non-oriented electromagnetic steel sheet having low iron loss at high frequencies without the addition of a large amount of an alloy element such as Cr, which would reduce magnetic flux density, and without a reduction in the sheet thickness, which would reduce productivity. This non-oriented electromagnetic steel sheet has a prescribed component composition including 0.0005-0.0050 mass% of Co, wherein: 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 no more than 0.003 mass%; and on the surface, there is an oxide layer that contains one or both of Al and Si and has a thickness of at least 10 nm and less than 80 nm.
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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/JP2023/001793
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 | |||
| JP2019014927A | 2019-01-31 | |||
| JP2006241563A | 2006-09-14 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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