US 12,424,360 B2
Grain-oriented electrical steel sheet and method for manufacturing same
Takashi Kataoka, Tokyo (JP); Tomohito Tanaka, Tokyo (JP); Masataka Iwaki, Tokyo (JP); Kazutoshi Takeda, Tokyo (JP); and Hideyuki Hamamura, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/283,423
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Mar. 28, 2022, PCT No. PCT/JP2022/015222
§ 371(c)(1), (2) Date Sep. 21, 2023,
PCT Pub. No. WO2022/203089, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-053618 (JP), filed on Mar. 26, 2021.
Prior Publication US 2024/0177899 A1, May 30, 2024
Int. Cl. H01F 1/147 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C21D 10/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/34 (2006.01); C22C 38/60 (2006.01); C23D 3/00 (2006.01); C23D 5/04 (2006.01); C23D 13/00 (2006.01)
CPC H01F 1/14783 (2013.01) [C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C21D 8/1266 (2013.01); C21D 8/1283 (2013.01); C21D 8/1288 (2013.01); C21D 9/46 (2013.01); C21D 10/005 (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 38/12 (2013.01); C22C 38/16 (2013.01); C22C 38/34 (2013.01); C22C 38/60 (2013.01); C23D 3/00 (2013.01); C23D 5/04 (2013.01); C23D 13/00 (2013.01); C21D 2201/05 (2013.01); C22C 2202/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet comprising:
a base steel sheet;
a glass coating formed on the base steel sheet; and
a tension-applied insulation coating formed on the glass coating,
wherein the base steel sheet has the chemical composition, by mass %:
C: 0.010% or less,
Si: 3.00% to 4.00%,
Mn: 0.01% to 0.50%,
N: 0.010% or less,
Sol. Al: 0.020% or less,
P: 0.030% or less,
S: 0.010% or less,
Sn: 0% to 0.50%,
Cu: 0% to 0.50%,
Cr: 0% to 0.50%,
Se: 0% to 0.020%,
Sb: 0% to 0.500%,
Mo: 0% to 0.10%, and
a remainder of Fe and impurities,
wherein, on a front surface of the base steel sheet, a plurality of linear strains that extend continuously or intermittently in a direction intersecting with a rolling direction are present,
intervals p in the rolling direction of the plurality of linear strains adjacent to each other are 3.0 to 9.0 mm,
widths of the linear strains are 10 to 250 μm, and
in an X-ray topographic spectrum in a range of 1.50 mm in the rolling direction including the linear strain at a center, that is obtained from an X-ray topographic image of the front surface, a full width at half maximum of a peak of the X-ray topographic spectrum including a maximum value of a spectral intensity is 0.02 mm or more and 0.10 mm or less.