US 12,354,778 B2
Grain-oriented electrical steel sheet and method for producing same
Makoto Watanabe, Tokyo (JP); Masahiro Suemune, Tokyo (JP); and Takeshi Imamura, Tokyo (JP)
Assigned to JFE Steel Corporation, Tokyo (JP)
Appl. No. 17/768,570
Filed by JFE Steel Corporation, Tokyo (JP)
PCT Filed Oct. 27, 2020, PCT No. PCT/JP2020/040278
§ 371(c)(1), (2) Date Apr. 13, 2022,
PCT Pub. No. WO2021/085421, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-198947 (JP), filed on Oct. 31, 2019.
Prior Publication US 2024/0105369 A1, Mar. 28, 2024
Int. Cl. H01F 1/147 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); 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); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/20 (2006.01); C22C 38/34 (2006.01); C22C 38/40 (2006.01); C22C 38/60 (2006.01); C23G 1/08 (2006.01)
CPC H01F 1/14783 (2013.01) [C21D 1/74 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/004 (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 9/46 (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 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/34 (2013.01); C22C 38/40 (2013.01); C22C 38/60 (2013.01); C23G 1/08 (2013.01); C22C 2202/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A grain-oriented electrical steel sheet for magnetic domain subdividing treatment having a forsterite undercoat film,
characterized in that
a pickling weight loss caused by pickling the undercoat film with an aqueous solution of 5 mass % HCl at 60° C. for 60 seconds is not more than 1.8 g/m2, and
a total concentration of Sn, Sb, Mo, and W present on a boundary face between the undercoat film and iron matrix is 0.01 to 0.15 mass %.