US 12,331,376 B2
Non-oriented electrical steel sheet and method for producing same
Tomoyuki Okubo, Tokyo (JP); Takaaki Tanaka, Tokyo (JP); Yoshiaki Zaizen, Tokyo (JP); and Yoshihiko Oda, Tokyo (JP)
Assigned to JFE Steel Corporation, Tokyo (JP)
Appl. No. 17/420,209
Filed by JFE Steel Corporation, Tokyo (JP)
PCT Filed Jan. 22, 2020, PCT No. PCT/JP2020/002045
§ 371(c)(1), (2) Date Jul. 1, 2021,
PCT Pub. No. WO2020/153387, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 2019-010323 (JP), filed on Jan. 24, 2019.
Prior Publication US 2022/0064751 A1, Mar. 3, 2022
Int. Cl. C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (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 38/14 (2006.01); C22C 38/60 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1266 (2013.01); C21D 8/1272 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (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 38/14 (2013.01); C22C 38/60 (2013.01); C22C 2202/02 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A non-oriented electrical steel sheet having a chemical composition comprising C: not more than 0.0050 mass %, Si: 3.2 to 5.0 mass %, Mn: not more than 2.0 mass %, P: not more than 0.02 mass %, S: not more than 0.0050 mass %, Al: 0.5 to 2.0 mass %, N: not more than 0.0050 mass %, Ti: not more than 0.0030 mass %, Nb: not more than 0.0010 mass %, V: not more than 0.0050 mass %, O: not more than 0.0050 mass %, provided that Si+Al≥4.07 mass %, and the remainder being Fe and inevitable impurities, characterized in that
a recrystallization ratio is 92% or less as an area ratio,
a strength C is not less than 2.0, and
a strength difference C−D is not more than 2.0,
where C is a strength at Φ=0° and φ1=0° and D is a strength at Φ=20° and φ1=0° in a section of φ2=45° of Crystalline Orientation Distribution Function obtained in a central layer of a sheet thickness.