公开(公告)号：US20220407371A1

公开(公告)日：2022-12-22

申请号：US17776441

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuo OHSUGI ,  Miho TOMITA ,  Tesshu MURAKAWA

IPC: H02K1/16 ,  H02K1/02 ,  C22C38/16 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  G06F30/36

Abstract: The present invention is a stator core having a plurality of laminated electrical steel sheets, in which, among a plurality of teeth (121a to 121p) of the stator core, a width of teeth along a direction in which magnetic characteristics are excellent may be narrower than a width of teeth along a direction in which the magnetic characteristics are poor.

公开(公告)号：US20220186336A1

公开(公告)日：2022-06-16

申请号：US17441084

申请日：2020-04-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Miho TOMITA ,  Yoshiaki NATORI ,  Hiroyoshi YASHIKI ,  Hiroshi FUJIMURA

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

Abstract: This electrical steel sheet contains, as a chemical composition, by mass %, C: 0.0035% or less, Si: 2.00% to 3.50%, Mn: 2.00% to 5.00%, P: 0.050% or less, S: 0.0070% or less, Al: 0.15% or less, N: 0.0030% or less, Ni: 0% to 1.00%, Cu: 0% to 0.10%, and a remainder: Fe and impurities, in which an X-ray random intensity ratio in a {100} crystal orientation on a sheet surface is 15.0 to 50.0, and magnetic flux densities in 0°, 22.5°, and 45° directions from a rolling direction each satisfy [1.005×(B50 (0°)+B50 (45°))/2≥B50 (22.5°)].

公开(公告)号：US20240047105A1

公开(公告)日：2024-02-08

申请号：US17769272

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Tesshu MURAKAWA ,  Miho TOMITA ,  Hiroshi FUJIMURA ,  Satoshi KANO

IPC: H01F1/147 ,  C22C38/16 ,  C22C38/60 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/10 ,  C21D9/46 ,  C21D8/12 ,  C21D1/30 ,  C21D6/00

CPC classification number: H01F1/14775 ,  C22C38/16 ,  C22C38/60 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/004 ,  C22C38/002 ,  C22C38/001 ,  C22C38/10 ,  C21D9/46 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1277 ,  C21D1/30 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C22C2202/02

Abstract: What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less and one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total with a remainder including Fe and impurities, in which a recrystallization rate is 1% to 99% in a metallographic structure, a sheet thickness is 0.50 mm or less, and, in the case of measuring a magnetic flux density B50 after annealing the non-oriented electrical steel sheet at 800° C. for two hours, a magnetic flux density B50 in a 45° direction with respect to a rolling direction is 1.75 T or more.

公开(公告)号：US20220021248A1

公开(公告)日：2022-01-20

申请号：US17311821

申请日：2020-01-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiaki NATORI ,  Hiroyoshi YASHIKI ,  Miho TOMITA

IPC: H02K1/02 ,  C22C38/58 ,  C22C38/50 ,  C22C38/42 ,  C22C38/34 ,  C22C38/28 ,  C22C38/20 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H02K5/04 ,  H02K1/12 ,  H02K1/22

Abstract: A non-oriented electrical steel sheet has a chemical composition containing, in terms of % by mass, C: 0.0015% or less and Si: 2.5 to 4.0% and having an average crystal grain size of 10 to 40 μm, and an internal oxidation layer having a thickness of 0.5 to 3.0 μm present in a sheet thickness direction of a surface thereof.

公开(公告)号：US20200040423A1

公开(公告)日：2020-02-06

申请号：US16606107

申请日：2018-07-19

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Hiroyoshi YASHIKI ,  Miho TOMITA ,  Hiroshi FUJIMURA ,  Takeaki WAKISAKA ,  Tesshu MURAKAWA ,  Takuya MATSUMOTO ,  Hiroki HORI ,  Yuuya GOHMOTO ,  O UYAMA

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

Abstract: A non-oriented electrical steel sheet includes, as a chemical composition, by mass %: C: 0.0015% to 0.0040%; Si: 3.5% to 4.5%; Al: 0.65% or less; Mn: 0.2% to 2.0%; Sn: 0% to 0.20%; Sb: 0% to 0.20%; P: 0.005% to 0.150%; S: 0.0001% to 0.0030%; Ti: 0.0030% or less; Nb: 0.0050% or less; Zr: 0.0030% or less; Mo: 0.030% or less; V: 0.0030% or less; N: 0.0010% to 0.0030%; O: 0.0010% to 0.0500%; Cu: less than 0.10%; Ni: less than 0.50%; and a remainder including Fe and impurities, in which a product sheet thickness is 0.10 mm to 0.30 mm, an average grain size is 10 μm to 40 μm, an iron loss W10/800 is 50 W/Kg or less, a tensile strength is 580 MPa to 700 MPa, and a yield ratio is 0.82 or more.

公开(公告)号：US20230139246A1

公开(公告)日：2023-05-04

申请号：US17918570

申请日：2021-04-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi YASHIKI ,  Yoshiaki NATORI ,  Miho TOMITA ,  Kazutoshi TAKEDA ,  Takuya MATSUMOTO

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

Abstract: A non-oriented electrical steel sheet including a base metal that has a chemical composition including, in mass%, C: 0.0010 to 0.0040%, Si: 4.0 to 5.0%, Mn: 0.20% or less Al: 0.010% or more and less than 0.050%, P: 0.030% or less, S: 0.0030% or less, N: 0.0005 to 0.0030%, O: 0.0100 to 0.0400%, Ca: less than 0.0010%, Ti: less than 0.0050%, Nb: less than 0.0050%, Zr: less than 0.0050%, V: less than 0.0050%, Cu: less than 0.20%, Ni: less than 0.50%, Sn: 0 to 0.05%, Sb: 0 to 0.05%, and a balance: Fe and impurities, in which the base metal has an O content of less than 0.0050% in a region excluding a portion from a surface of the base metal to a position of 10 µm in a depth direction of the base metal.

公开(公告)号：US20220385119A1

公开(公告)日：2022-12-01

申请号：US17775754

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Miho TOMITA ,  Tesshu MURAKAWA

IPC: H02K1/02 ,  C22C38/60 ,  C22C38/16 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

Abstract: The present invention is a stator core (21) including a plurality of split cores (30), in which the plurality of split cores (30) are configured by laminating core pieces (40) made of an electrical steel sheet, the electrical steel sheet is a predetermined electrical steel sheet, and, in the core pieces (40) of at least one split core (30) in the plurality of split cores (30), the radial directions of teeth (41) and extension directions of core backs (42) are all along a direction in which magnetic characteristics of the electrical steel sheet are excellent.

公开(公告)号：US20220385118A1

公开(公告)日：2022-12-01

申请号：US17775728

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Miho TOMITA ,  Tesshu MURAKAWA

IPC: H02K1/02 ,  C22C38/60 ,  C22C38/16 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/08

Abstract: An electrical steel sheet (300) is formed such that centerlines of four magnetic poles (salient poles) of a rotor core (111) coincide with a direction of easy magnetization (ED1) or (ED2). In addition, the electrical steel sheets (300) are laminated such that the directions of easy magnetization (ED1) and (ED2) are aligned.

公开(公告)号：US20210301363A1

公开(公告)日：2021-09-30

申请号：US17264207

申请日：2019-11-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi YASHIKI ,  Yoshiaki NATORI ,  Miho TOMITA ,  Kazutoshi TAKEDA ,  Takuya MATSUMOTO

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

Abstract: This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+0.5×Mn≥4.3], and an average grain size of the base metal is more than 40 μm and 120 μm or less.

公开(公告)号：US20220356549A1

公开(公告)日：2022-11-10

申请号：US17774370

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Tesshu MURAKAWA ,  Miho TOMITA ,  Hiroshi FUJIMURA ,  Satoshi KANO

IPC: C22C38/16 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/04 ,  C22C38/08 ,  C22C38/10

Abstract: What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less, one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total are contained and a remainder includes Fe and impurities, in which a sheet thickness is 0.50 mm or less, and, in an arbitrary cross section, when an area ratio of {100} crystal grains is indicated by Sac, an area ratio of {110} crystal grains is indicated by Sag, and an area ratio of the {100} crystal grains in a region of up to 20% from a side where a KAM value is high is indicated by Sbc, Sac>Sbc>Sag and 0.05>Sag are satisfied.