US 11,767,571 B2
Method of producing grain-oriented electrical steel sheet and production line therefor
Takeshi Omura, Tokyo (JP); Hirotaka Inoue, Tokyo (JP); Shigehiro Takajo, Tokyo (JP); and Seiji Okabe, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 16/81,121
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Mar. 8, 2017, PCT No. PCT/JP2017/009313
§ 371(c)(1), (2) Date Aug. 30, 2018,
PCT Pub. No. WO2017/159507, PCT Pub. Date Sep. 21, 2017.
Claims priority of application No. 2016-051466 (JP), filed on Mar. 15, 2016.
Prior Publication US 2019/0017139 A1, Jan. 17, 2019
Int. Cl. C21D 8/12 (2006.01); H01F 1/147 (2006.01); C22C 38/60 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/34 (2006.01)
CPC C21D 8/1277 (2013.01) [C21D 8/12 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); H01F 1/147 (2013.01); C21D 2201/05 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/34 (2013.01); C22C 38/60 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of producing a grain-oriented electrical steel sheet, comprising:
after final annealing, delivering the grain-oriented electrical steel sheet wound in a coil shape into a production line having a pressure reduced area;
then in the production line, heating the delivered grain-oriented electrical steel sheet to 50° C. or higher and 150° C. or lower, followed by cooling the grain-oriented electrical steel sheet such that the grain-oriented electrical steel sheet has a temperature of lower than 50° C. at the time of entering the pressure reduced area; and
then irradiating a surface of the grain-oriented electrical steel sheet with an electron beam in the pressure reduced area of the production line.