US 11,667,984 B2
Grain-oriented electrical steel sheet and manufacturing method therefor
Hyung Don Joo, Pohang-si (KR); Min Soo Han, Pohang-si (KR); Hyung Ki Park, Pohang-si (KR); Sang Woo Lee, Pohang-si (KR); and Jin-Wook Seo, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 16/472,480
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 20, 2017, PCT No. PCT/KR2017/015129
§ 371(c)(1), (2) Date Jun. 21, 2019,
PCT Pub. No. WO2018/117642, PCT Pub. Date Jun. 28, 2018.
Claims priority of application No. 10-2016-0177014 (KR), filed on Dec. 22, 2016.
Prior Publication US 2021/0130918 A1, May 6, 2021
Int. Cl. C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/18 (2006.01); C22C 38/60 (2006.01); C21D 8/12 (2006.01)
CPC C21D 8/1222 (2013.01) [C21D 8/1205 (2013.01); C21D 8/1233 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/60 (2013.01)] 6 Claims
 
1. A grain-oriented electrical steel sheet, consisting of:
Si at 1.0 wt % to 7.0 wt %,
C at 0.005 wt % or less (excluding 0 wt %),
In at 0.001 wt % to 0.5 wt %,
Sb at 0.005 wt % to 0.15 wt %,
optionally at least one of Mn, Al, N, S, Sn, P, and Cr, and
the remainder including Fe and other impurities unavoidably added thereto,
wherein a surface roughness (Ra) is 0.1 μm or less.