公开(公告)号：US20240254601A1

公开(公告)日：2024-08-01

申请号：US18561064

申请日：2022-05-27

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Ayaka YOSHIKAWA ,  Masanori TAKENAKA ,  Kazuaki TAMURA

IPC: C22C38/02 ,  C21D3/04 ,  C21D6/00 ,  C21D8/12 ,  C22C38/04 ,  C22C38/60 ,  C23G1/08

CPC classification number: C22C38/02 ,  C21D3/04 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/04 ,  C22C38/60 ,  C23G1/08

Abstract: Disclosed is a method for producing a grain-oriented electrical steel sheet, including subjecting a steel material containing, by mass %, Si: 2.0-5.0%, Mn: 0.01-0.50%, and one or both of S and Se: 0.001-0.100% in total, to hot rolling, followed by cold rolling once, or twice or more with intermediate annealing in between, followed by decarburization annealing, followed by application and drying of an annealing separator mainly composed of MgO, followed by final annealing, followed by flattening annealing, in which the final annealing is performed in a predetermined atmosphere, the flattening annealing is accompanied by coating treatment including application of a coating solution, and prior to the application of the coating solution, pickling treatment is performed using an acid with a predetermined concentration at a temperature of 15° C. or higher for 1 second or more and 60 seconds or less.