US 12,394,547 B2
Grain-oriented electrical steel sheet and manufacturing method therefor
Se-Min Park, Pohang-si (KR); and Ju Seung Lee, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 17/415,823
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 18, 2019, PCT No. PCT/KR2019/018033
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/130645, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10-2018-0165650 (KR), filed on Dec. 19, 2018.
Prior Publication US 2022/0051837 A1, Feb. 17, 2022
Int. Cl. C21D 10/00 (2006.01); H01F 1/18 (2006.01); H01F 27/245 (2006.01); H01F 41/02 (2006.01)
CPC H01F 1/18 (2013.01) [C21D 10/005 (2013.01); C21D 2201/05 (2013.01); H01F 27/2455 (2013.01); H01F 41/024 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet comprising:
a plurality of linear deformable portions formed on a surface of the electrical steel sheet in a rolling direction,
wherein an interval between the deformable portions changes depending on a grain size of grains over an entire length of the steel sheet such that the interval is wider when the grain size is smaller and the interval is narrower when the grain size is larger, and
at least two regions in which intervals between the deformable portions are different exist,
wherein a grain size (x, mm) of grains and an interval (y, mm) between the deformable portions satisfy Equation 1 below:
y−2≤8.943−0.45x+0.011x2≤y+2.  [Equation 1]