公开(公告)号：US20230243013A1

公开(公告)日：2023-08-03

申请号：US18009919

申请日：2021-06-23

申请人： NIPPON STEEL CORPORATION

发明人： Nobusato MORISHIGE ,  Kazumi MIZUKAMI ,  Ryutaro YAMAGATA ,  Takashi KATAOKA ,  Haruhiko ATSUMI ,  Daisuke ITABASHI ,  Junichi TAKAOBUSHI

IPC分类号： C21D9/46 ,  C21D8/12 ,  C22C38/60 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  H01F41/00

CPC分类号： C21D9/46 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1255 ,  C22C38/60 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D8/1261 ,  H01F1/14775 ,  H01F41/00 ,  C21D2201/05 ,  C22C2202/02

摘要： A new and improved method for producing grain-oriented electrical steel sheet enabling production of grain-oriented electrical steel sheet realizing high magnetic flux density and excellent in magnetic characteristics, that is, as one aspect, a method for producing grain-oriented electrical steel sheet comprising a hot rolling process, cold rolling process, primary recrystallization annealing process, finish annealing process, and flattening annealing process, wherein shot blasting treatment and/or leveling treatment and treatment for contact with a solution are performed, the solution contains Cu etc. in a predetermined amount, the pH is −1.5 or more and less than 7, a solution temperature is 15° C. or more and 100° C. or less, and the time during which the steel sheet is dipped in the solution is 5 seconds or more and 200 seconds or less.