Title:
NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/121267
Kind Code:
A1
Abstract:
A non-directional electrical steel sheet according to an embodiment of the present invention comprises: by weight%, 2.5 to 4.5% of Si; 0.04 to 1.4% of Mn; 0.2 to 1.1% of Al; 0.0005 to 0.003% of Bi: 0.0005 to 0.003% of Zr; 0.0005 to 0.004% of As; and the balance of Fe and inevitable impurities, wherein an innermost portion containing 5% O is 5 μm or less in length from the surface of the steel sheet in the inward direction.
Inventors:
HONG JAEWAN (KR)
JOO HYUNG DON (KR)
PARK JUNESOO (KR)
JOO HYUNG DON (KR)
PARK JUNESOO (KR)
Application Number:
PCT/KR2022/020902
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; C22C38/14; H01F1/147
Foreign References:
| US20020066500A1 | 2002-06-06 | |||
| KR102009392B1 | 2019-08-09 | |||
| KR101051747B1 | 2011-07-25 | |||
| KR101649324B1 | 2016-08-19 | |||
| JP2008050686A | 2008-03-06 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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