Invention Publication
- Patent Title: GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
-
Application No.: US18268441Application Date: 2021-12-17
-
Publication No.: US20240079166A1Publication Date: 2024-03-07
- Inventor: Daehyun SONG , Sangwoo LEE
- Applicant: POSCO Co., Ltd.
- Applicant Address: KR Pohang-si, Gyeongsangbuk-do
- Assignee: POSCO Co., Ltd.
- Current Assignee: POSCO Co., Ltd.
- Current Assignee Address: KR Pohang-si, Gyeongsangbuk-do
- Priority: KR 20200179372 2020.12.21
- International Application: PCT/KR2021/019330 2021.12.17
- Date entered country: 2023-07-11
- Main IPC: H01F1/147
- IPC: H01F1/147 ; C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/04 ; C22C38/06 ; C22C38/34 ; C22C38/60

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.
Information query