US 12,215,403 B2
Non-oriented electrical steel sheet and method for manufacturing same
Hunju Lee, Pohang-si (KR); Jae-Hoon Kim, Pohang-si (KR); Seung-Gon Lee, Pohang-si (KR); and Seung Il Kim, Pohang-si (KR)
Assigned to POSCO, Pohang-si (KR)
Appl. No. 17/787,023
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 9, 2020, PCT No. PCT/KR2020/017976
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/125683, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10-2019-0171449 (KR), filed on Dec. 20, 2019.
Prior Publication US 2023/0021153 A1, Jan. 19, 2023
Int. Cl. C22C 38/50 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/34 (2006.01); C22C 38/44 (2006.01); H01F 1/16 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (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 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/34 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); H01F 1/16 (2013.01); C22C 2202/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A non-oriented electrical steel sheet including, in wt %, C: 0.005 wt % or less, Si: 1.5 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.05 to 1.5%, Sn: 0.015 to 0.1%, P: 0.005 to 0.05%, Ga: 0.001 to 0.004%, and Bi: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities,
wherein an area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.
 
12. A manufacturing method of a non-oriented electrical steel sheet, comprising:
hot-rolling a slab including, in wt %, C: 0.005% or less, Si: 1.5 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.05 to 1.5%, Sn: 0.015 to 0.1%, P: 0.005 to 0.05%, Ga: 0.001 to 0.004%, and Bi: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities to manufacture a hot-rolled sheet;
cold-rolling the hot-rolled sheet at a reduction ratio of 85% or more to manufacture a cold-rolled sheet; and
final annealing the cold-rolled sheet,
wherein after final annealing, an area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.