公开(公告)号：US11859265B2

公开(公告)日：2024-01-02

申请号：US18077873

申请日：2022-12-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro Tanaka ,  Takeaki Wakisaka ,  Shun Ota

IPC: C22C38/60 ,  C22C38/34 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  H02K15/02 ,  H02K1/02

CPC classification number: C22C38/60 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  H01F1/14775 ,  H02K15/02 ,  C22C2202/02 ,  H02K1/02

Abstract: A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X1 value defined by X=(2×B50L+B50C)/(3×IS) is less than 0.845, an X2 value defined by X2=(B50L+2×B50D+B50C)/(4×IS) is 0.800 or more, and an iron loss W10/1k is 80 W/kg or less.

公开(公告)号：US11459632B2

公开(公告)日：2022-10-04

申请号：US16771533

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Takashi Morohoshi ,  Masafumi Miyazaki

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

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: 0.0015% to 0.0100% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R=(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.

公开(公告)号：US12081068B2

公开(公告)日：2024-09-03

申请号：US17291344

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeaki Wakisaka ,  Hiroshi Fujimura ,  Ryu Hirayama

IPC: H02K1/14 ,  H02K15/02

CPC classification number: H02K1/148 ,  H02K15/028 ,  H02K2213/03

Abstract: A laminated core includes a plurality of electrical steel sheets that are stacked on one another. All sets of the electrical steel sheets adjacent to each other in a stacking direction are fixed to each other in the laminated core. Some sets of electrical steel sheets among all sets of the electrical steel sheets are fastened but not adhered to each other, and the remaining sets of electrical steel sheets are adhered but not fastened to each other.

公开(公告)号：US11749429B2

公开(公告)日：2023-09-05

申请号：US18077106

申请日：2022-12-07

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeaki Wakisaka ,  Ichiro Tanaka

IPC: H01F1/147 ,  C21D8/02 ,  C21D8/12 ,  H02K15/03

CPC classification number: H01F1/14775 ,  C21D8/0247 ,  C21D8/1244 ,  H01F1/14716 ,  H01F1/14791 ,  H02K15/03

Abstract: A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X1 value defined by X1=(2×B50L+B50C)/(3×IS) is less than 0.845, an E1 value defined by E1=EL/EC is 0.930 or more, and an iron loss W10/1k is 80 W/kg or less.

公开(公告)号：US11566303B2

公开(公告)日：2023-01-31

申请号：US16958097

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Masafumi Miyazaki ,  Takashi Morohoshi

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

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: 0.0003% or greater and less than 0.0015% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R−(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.

公开(公告)号：US12276004B2

公开(公告)日：2025-04-15

申请号：US17425901

申请日：2020-02-14

Applicant: NIPPON STEEL CORPORATION

Inventor： Tesshu Murakawa ,  Hiroshi Fujimura ,  Takeaki Wakisaka ,  Takeshi Kubota

IPC: C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147

Abstract: The present disclosure has as its object the provision of non-oriented electrical steel sheet excellent in magnetic properties which is free from any drop in magnetic flux density even after stress relief annealing and a method for manufacturing the same.
Non-oriented electrical steel sheet having a chemical composition containing C: 0.0030 mass % or less, Si: 2.0 mass % or more and 4.0 mass % or less, Al: 0.010 mass % or more and 3.0 mass % or less, Mn: 0.10 mass % or more and 2.4% mass or less, P: 0.0050 mass % or more and 0.20 mass % or less, S: 0.0030 mass % or less, and one or more elements selected from the group comprising Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd: total 0.00050 mass % or more and having a balance of Fe and unavoidable impurities, where, when designating a mass % of Si as [Si], a mass % of Al as [Al], and a mass % of Mn as [Mn], a parameter Q shown by the following formula (1) is 2.0 or more, a random intensity ratio of the {100} orientation is 2.4 or more, and an average grain size is 30 μm or less: Q=[Si]+2[Al]−[Mn]  (1).

公开(公告)号：US11973369B2

公开(公告)日：2024-04-30

申请号：US17292762

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi Fujimura ,  Takeaki Wakisaka ,  Ryu Hirayama

IPC: H02K1/14 ,  H02K1/16

CPC classification number: H02K1/146 ,  H02K1/16 ,  H02K2201/09 ,  H02K2213/03

Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, wherein, among the plurality of electrical steel sheets, both of the electrical steel sheets located on a first side in a stacking direction and the electrical steel sheets located on a second side in the stacking direction are fastened to each other but are not adhered to each other, and the electrical steel sheets located in a center in the stacking direction are adhered to each other but are not fastened to each other.

公开(公告)号：US11814710B2

公开(公告)日：2023-11-14

申请号：US18077789

申请日：2022-12-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro Tanaka ,  Takeaki Wakisaka

IPC: C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  H01F1/147

CPC classification number: C22C38/60 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  H01F1/14716 ,  C22C2202/02

Abstract: A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X value defined by X=(2×B50L+B50C)/(3×IS) is 0.800 or more, and an iron loss W10/1k is 80 W/kg or less.

公开(公告)号：US11618072B2

公开(公告)日：2023-04-04

申请号：US17054977

申请日：2019-05-27

Applicant: NIPPON STEEL CORPORATION

Inventor： Masafumi Miyazaki ,  Takeaki Wakisaka ,  Takashi Arai ,  Naotsugu Yoshida

IPC: B22D11/16 ,  B22D11/06

Abstract: This thin strip manufacture method is a thin strip manufacture method for manufacturing a thin strip by supplying molten steel to a molten steel pool formed by a pair of rotating cooling drums and a pair of side weirs to form and grow a solidified shell on a peripheral surface of the cooling drums, wherein a pressing force P of the pair of the cooling drums is set so that the pressing force P (kgf/mm) of the pair of cooling drums, casting thickness D (mm), and radius R (m) of the cooling drums satisfy 0.90≤P×(D×R)0.5≤1.30.

公开(公告)号：US11469018B2

公开(公告)日：2022-10-11

申请号：US16957313

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeshi Kubota ,  Takeaki Wakisaka ,  Masafumi Miyazaki ,  Takashi Morohoshi

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

Abstract: A non-oriented electrical steel sheet according to one embodiment of the invention has a chemical composition represented by C: 0.0030% or less, Si: 2.00% or less, Al: 1.00% or less, Mn: 0.10% to 2.00%, S: 0.0030% or less, one or more selected from the group consisting of Mg, Ca, Sr, Ba, Nd, Pr, La, Ce, Zn, and Cd: greater than 0.0100% and not greater than 0.0250% in total, a parameter Q represented by Q=[Si]+2×[Al]−[Mn]: 2.00 or less; Sn: 0.00% to 0.40%, Cu: 0.00% to 1.00%, and a remainder: Fe and impurities, and a parameter R represented by R=(I100+I310+I411+I521)/(I111+I211+I332+I221) is 0.80 or greater.