US 12,276,004 B2
Non-oriented electrical steel sheet
Tesshu Murakawa, Tokyo (JP); Hiroshi Fujimura, Tokyo (JP); Takeaki Wakisaka, Tokyo (JP); and Takeshi Kubota, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/425,901
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Feb. 14, 2020, PCT No. PCT/JP2020/005893
§ 371(c)(1), (2) Date Jul. 26, 2021,
PCT Pub. No. WO2020/166718, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 2019-024587 (JP), filed on Feb. 14, 2019.
Prior Publication US 2022/0186330 A1, Jun. 16, 2022
Int. Cl. C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); H01F 1/147 (2006.01)
CPC C21D 8/1272 (2013.01) [C21D 8/1211 (2013.01); C21D 8/1222 (2013.01); C21D 8/1227 (2013.01); C21D 8/1233 (2013.01); C21D 9/46 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); H01F 1/14775 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A non-oriented electrical steel sheet having a chemical composition containing C: 0.0030 mass % or less, Si: 2.0 mass % or more and 4.0 mass % or less, Al: 0.010 mass % or more and 3.0% mass or less, Mn: 0.10 mass % or more and 2.4 mass % or less, P: 0.0050 mass % or more and 0.20 mass % or less, S: 0.0030 mass % or less, and one or more elements selected from the group comprising Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd: total 0.00050 mass % or more and having a balance of Fe and unavoidable impurities, where,
when designating a mass % of Si as [Si], a mass % of Al as [Al], and a mass % of Mn as [Mn], a parameter Q shown by the following formula (1) is 2.0 or more,
a random intensity ratio of the {100} orientation is 2.4 or more, and
an average grain size is 30 μm or less:
Q=[Si]+2[Al]−[Mn]  (1).