Title:
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/121191
Kind Code:
A1
Abstract:
This non-oriented electrical steel sheet comprises: 3.0-4.0 weight% of Si; 0.1-1.5 weight% of Al; 0.1-0.5 weight% of Mn; 2-20 weight% of Cr with respect to the content of Mn; 0.006-0.1 weight% of a sum of Sn and Sb; 0.0010-0.0050 weight% of C; and 0.0003-0.0050 weight% of at least one of N, S, Ti, Nb and V, and comprises the remainder of Fe and inevitable impurities, wherein an area fraction of grains having a grain diameter of 10 % or less of the thickness of the steel sheet is 0.5 % or more, a number fraction of grains is 20 % or more, and an average grain diameter from the center layer in the thickness direction of the steel sheet to the surface layer thereof satisfies the relationship in which D (surface)/D (center) ≥ 0.6.
Inventors:
LEE HUNJU (KR)
SHIN SU-YONG (KR)
KIM YUNSU (KR)
SHIN SU-YONG (KR)
KIM YUNSU (KR)
Application Number:
PCT/KR2022/020753
Publication Date:
June 29, 2023
Filing Date:
December 19, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/34; C21D8/12; C21D9/46; C22C38/00; C22C38/24; C22C38/26; C22C38/28; H01F1/147
Foreign References:
| KR20210078978A | 2021-06-29 | |||
| JP2001247943A | 2001-09-14 | |||
| KR20210080658A | 2021-07-01 | |||
| JP2005256019A | 2005-09-22 | |||
| KR101203791B1 | 2012-11-21 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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