US 11,923,116 B2
Grain-oriented electrical steel sheet and method of producing same
Takeshi Omura, Tokyo (JP); Yoshihisa Ichihara, Tokyo (JP); Kunihiro Senda, Tokyo (JP); and Takahiro Koshihara, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/298,672
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Nov. 21, 2019, PCT No. PCT/JP2019/045645
§ 371(c)(1), (2) Date Jun. 1, 2021,
PCT Pub. No. WO2020/116188, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-228380 (JP), filed on Dec. 5, 2018.
Prior Publication US 2022/0020514 A1, Jan. 20, 2022
Int. Cl. H01F 1/147 (2006.01); C21D 1/34 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/34 (2006.01); C22C 38/60 (2006.01)
CPC H01F 1/147 (2013.01) [C21D 1/34 (2013.01); C21D 6/008 (2013.01); C21D 9/46 (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 38/22 (2013.01); C22C 38/34 (2013.01); C22C 38/60 (2013.01); C21D 2201/05 (2013.01); C22C 2202/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet comprising a plurality of magnetic domains refined via a local strain introduction portion, wherein
when a direct-current external magnetic field is applied to the steel sheet in a rolling direction, for a magnetic flux leaked from the local strain introduction portion at a position 1.0 mm away from an irradiation surface, a value obtained by dividing an intensity level of a total leakage magnetic flux by an intensity level of a magnetic flux leaked due to causes other than strain is more than 1.2.