US 12,331,375 B2
Grain-oriented electrical steel sheet and method for producing same
Dae-Hyun Song, Pohang-si (KR); and June Soo Park, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 17/413,893
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 10, 2019, PCT No. PCT/KR2019/017394
§ 371(c)(1), (2) Date Jun. 14, 2021,
PCT Pub. No. WO2020/122558, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 10-2018-0160910 (KR), filed on Dec. 13, 2018.
Prior Publication US 2022/0064749 A1, Mar. 3, 2022
Int. Cl. C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/30 (2006.01); C22C 38/34 (2006.01); C22C 38/60 (2006.01); H01F 1/147 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/002 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1272 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/06 (2013.01); C22C 38/30 (2013.01); C22C 38/34 (2013.01); C22C 38/60 (2013.01); H01F 1/147 (2013.01); C21D 2201/05 (2013.01); C22C 2202/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet comprising:
an electrical steel sheet substrate including, by wt %, 2.0 to 6.0% of Si, equal to or less than 0.005% of C (excluding 0%), 0.01 to 0.05% of Sb, 0.03 to 0.08% of Sn, 0.01 to 0.2% of Cr, and 0.0003 to 0.097% of Co, and including a remainder of Fe and inevitable impurities; and
a metal oxide layer disposed on a surface of the electrical steel sheet substrate,
wherein the metal oxide layer includes 0.0005 to 0.25 wt % of Co, 10 to 30 wt % of Si, 30 to 55 wt % of 0, 25 to 50 wt % of Mg, a remainder of Fe and inevitable impurities.