US 12,467,109 B2
Grain-oriented electrical steel sheet and method for manufacturing same
Hyun-Seok Ko, Pohang-si (KR); Hongwook Jung, Pohang-si (KR); Se-Min Park, Pohang-si (KR); and Jin-Wook Seo, Pohang-si (KR)
Assigned to POSCO, Pohang-si (KR)
Appl. No. 17/787,111
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 17, 2020, PCT No. PCT/KR2020/018618
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/125864, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10-2019-0171867 (KR), filed on Dec. 20, 2019.
Prior Publication US 2022/0389532 A1, Dec. 8, 2022
Int. Cl. C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); H01F 1/16 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); H01F 1/16 (2013.01); C21D 2201/05 (2013.01); C22C 2202/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet in which among all grains, grains having a ratio D2/D1 of a diameter D2 of an inscribed circle to a diameter D1 of a circumscribed circle of 0.4 or more are 90% or more, and grains in which a <100> orientation is parallel to a rolling direction (RD) of the steel sheet by 5° or less are 15% or more, wherein grains in which a <100> direction forms an angle of 10° to 15° with the rolling direction (RD) of the steel sheet are 30% or less.