Title:
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/121270
Kind Code:
A1
Abstract:
A non-oriented electrical steel sheet according to an embodiment of the present invention comprises, by wt%, 3.1-3.8% of Si, 0.5-1.5% of Al, 0.3-1.5% of Mn, 0.01-0.15% of Cr, 0.02-0.08% of Sn, 0.03-0.06% of Sb, and the remainder of Fe and inevitable impurities. The non-oriented electrical steel sheet according to an embodiment of the present invention comprises: a surface portion forming up to 1/10 of the thickness of the steel sheet from the surface of the steel sheet to the inside thereof; and a central portion, wherein, when the non-oriented electrical steel sheet is punched, the length of a plastic deformation portion may be 100 μm or less. The plastic deformation portion is the length of a portion where the hardness of the surface portion exceeds 1.10 times the hardness of the central portion, from a punched end.
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Inventors:
KIM JAE-HOON (KR)
SHIN SU-YONG (KR)
KIM YUNSU (KR)
SHIN SU-YONG (KR)
KIM YUNSU (KR)
Application Number:
PCT/KR2022/020907
Publication Date:
June 29, 2023
Filing Date:
December 20, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/02; C21D8/12; C22C38/04; C22C38/06; C22C38/12; H01F1/147
Domestic Patent References:
| WO2021167063A1 | 2021-08-26 |
Foreign References:
| KR102176351B1 | 2020-11-09 | |||
| KR102106409B1 | 2020-05-04 | |||
| JP2019504193A | 2019-02-14 | |||
| US20200332387A1 | 2020-10-22 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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