公开(公告)号：US12040110B2

公开(公告)日：2024-07-16

申请号：US17318407

申请日：2021-05-12

Applicant: POSCO CO., LTD

Inventor： Hyun-Seok Ko ,  Kyu-Seok Han ,  Hyung-Ki Park ,  Jin-Wook Seo ,  Jae-Soo Lim ,  Hyung Don Joo

IPC: C21D9/46 ,  C21D3/04 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  H01F1/147

CPC classification number: H01F1/14775 ,  C21D3/04 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04

Abstract: Disclosed are an oriented electrical steel sheet and a manufacturing method thereof. An exemplary embodiment of the present invention provides a method of manufacturing an oriented electrical steel sheet, including: providing a slab including Si at 1.0 to 4.0 wt %, C at 0.1 to 0.4 wt %, and the remaining portion including Fe and other inevitably incorporated impurities; reheating the slab; producing a hot rolled steel sheet by hot rolling the slab; performing annealing of the hot rolled steel sheet; cold rolling the annealed hot rolled steel sheet; decarburizing and primary annealing the cold rolled steel sheet; cold rolling the decarburized and annealed steel sheet; and secondary annealing the cold rolled steel sheet.