公开(公告)号：US20250037912A1

公开(公告)日：2025-01-30

申请号：US18274154

申请日：2022-02-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi YASHIKI ,  Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Ichiro TANAKA ,  Yoshihiro ARITA ,  Hiroki HORI ,  Wataru OHASHI

IPC: H01F1/147 ,  C21D1/74 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60

Abstract: This non-oriented electrical steel sheet includes a base material having a chemical composition containing, by mass %, C: 0 to 0.0050%, Si: 3.8 to 4.9%, Mn: 0.05 to 1.20%, sol. Al: more than 0.02% and 0.50% or less, P: 0 to 0.030%, S: 0 to 0.0030%, N: 0 to 0.0030%, Ti: 0% or more and less than 0.0050%, Nb: 0% or more and less than 0.0050%, Zr: 0% or more and less than 0.0050%, V: 0% or more and less than 0.0050%, Cu: 0% or more and less than 0.200%, Ni: 0% or more and less than 0.500%, Sn: 0 to 0.100%, Sb: 0 to 0.100%, and the balance: Fe and impurities, wherein the non-oriented electrical steel sheet satisfies [4.3≤Si+sol. Al+0.5×Mn≤5.0], [B50(0°)−B50(45°)≤0.16], and [B50(0°)+2×B50(45°)+B50(90°)/4≥1.57], and has tensile strength of 580 MPa or greater.

公开(公告)号：US20240084415A1

公开(公告)日：2024-03-14

申请号：US18284765

申请日：2022-03-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi YASHIKI ,  Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Ichiro TANAKA ,  Yoshihiro ARITA ,  Hiroki HORI ,  Wataru OHASHI

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60 ,  H01F1/147

CPC classification number: C21D9/46 ,  C21D6/001 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1283 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60 ,  H01F1/14775

Abstract: This non-oriented electrical steel sheet includes a base material having a chemical composition including Si: 3.7 to 4.8%, wherein a recrystallization rate is less than 100% in terms of an area fraction, the following Formula (i) and Formula (ii) are satisfied, and the tensile strength is more than 700 MPa.


4.3≤Si+sol. Al+0.5×Mn≤4.9  (i)



(B50(0°)+2×B50(45°)+B50(90°))/4≥1.57  (ii)