Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/113527
Kind Code:
A1
Abstract:
The present invention pertains to a grain-oriented electrical steel sheet and a method for manufacturing same. The grain-oriented electrical steel sheet according to an embodiment of the present invention comprises: a base material containing 2.5-4.0 wt% of Si, 0.005 wt% or less of C, 0.015-0.040 wt% of Al, 0.04-0.15 wt% of Mn, 0.005 wt% or less of N, 0.03-0.10 wt% of Sn, 0.05-0.2 wt% of Cr, 0.010-0.050 wt% of P, and 0.01-0.05 wt% of Sb, with the remainder comprising Fe and inevitable impurities; and a metal oxide layer disposed on the base material, and has an average iron loss (W17/50) of 0.80 W/kg or less, wherein the maximum emission intensity ratio of the metal oxide layer may satisfy Expression 1. Expression 1: I(Cr)/I_max(Mg) ≤ 2 % (In Expression 1, I(Cr) is the intensity of Cr in the metal oxide layer, and I_max(Mg) denotes the maximum emission intensity of Mg in the metal oxide layer)
Inventors:
KO KYUNGJUN (KR)
SONG JAEHWA (KR)
LEE SANGWOO (KR)
SONG JAEHWA (KR)
LEE SANGWOO (KR)
Application Number:
PCT/KR2022/020561
Publication Date:
June 22, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/34; C21D8/12; C22C38/00; C22C38/24; H01F1/147
Foreign References:
| JP3386751B2 | 2003-03-17 | |||
| KR101751523B1 | 2017-06-27 | |||
| KR19990088281A | 1999-12-27 | |||
| US5261972A | 1993-11-16 | |||
| JPH10121135A | 1998-05-12 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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