US 12,480,174 B2
600 MPa grade non-oriented electrical steel sheet and manufacturing method thereof
Feng Zhang, Shanghai (CN); Baojun Liu, Shanghai (CN); Jun Li, Shanghai (CN); Bo Wang, Shanghai (CN); Kanyi Shen, Shanghai (CN); and Guobao Li, Shanghai (CN)
Assigned to BAOSHAN IRON & STEEL CO., LTD, Shanghai (CN)
Appl. No. 17/636,787
Filed by BAOSHAN IRON & STEEL CO., LTD, Shanghai (CN)
PCT Filed Aug. 26, 2020, PCT No. PCT/CN2020/111402
§ 371(c)(1), (2) Date Feb. 18, 2022,
PCT Pub. No. WO2021/037061, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910790407.1 (CN), filed on Aug. 26, 2019.
Prior Publication US 2022/0275472 A1, Sep. 1, 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 38/14 (2006.01); C22C 38/60 (2006.01); H01F 1/147 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1261 (2013.01); C21D 8/1283 (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 38/14 (2013.01); C22C 38/60 (2013.01); H01F 1/147 (2013.01)] 11 Claims
 
1. A non-oriented electrical steel sheet having a tensile strength of 600 MPa or more, consisting of the following chemical elements in mass percentage: 0<C≤0.0035%; Si: 2.0-3.5%; Mn: 0.4-1.2%; P: 0.03-0.2%; Al: 0.4-2.0%; at least one of Sb and Sn in a total content of 0.003-0.2%; at least one of Mg, Ca and REM in a total content of 0.0005-0.01%; and the balance being Fe and unavoidable impurities, wherein the non-oriented electrical steel sheet contains AIN inclusions with a size greater than 0.5 μm and further contains CaS inclusions and/or composite inclusions of AIN and CaS with a size greater than 0.5 μm.