公开(公告)号：US20240079166A1

公开(公告)日：2024-03-07

申请号：US18268441

申请日：2021-12-17

Applicant: POSCO Co., Ltd.

Inventor： Daehyun SONG ,  Sangwoo LEE

IPC: H01F1/147 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60

CPC classification number: H01F1/14775 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60 ,  C21D2201/05 ,  C22C2202/02

Abstract: A grain-oriented electrical steel sheet according to an embodiment of the present invention comprises, by wt %, 2.0-4.0% of Si, 0.04-0.2% of Mn, 0.010% or less of N (excluding 0%), 0.005% or less of C (excluding 0%), 0.03-0.08% of Sn and 0.01-0.2% of Cr, the balance of Fe and inevitable impurities, and inclusions comprising at least one from among AlN, (Al,Si)N, (Al,Si,Mn)N, MnS, CuS and Al2O3, wherein the average diameter of the inclusions is 0.5-6.0 μm, and 40-130/mm2 inclusions having a diameter of 6.0 μm or less from among the inclusions can be included.