公开(公告)号：US20210043345A1

公开(公告)日：2021-02-11

申请号：US16978155

申请日：2019-03-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Takashi KATAOKA ,  Ichiro TANAKA ,  Haruhiko ATSUMI ,  Kazutoshi TAKEDA ,  Hirotoshi TADA

IPC: H01F1/147 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/60 ,  C22C38/20 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/34

Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet having a predetermined chemical composition; a glass coating provided on the surface of the base steel sheet; and a tension-applying insulation coating provided on the surface of the glass coating, in which linear thermal strains having, a predetermined angle (r) with respect to a transverse direction which is a direction orthogonal to a rolling direction are periodically formed on the surface of the tension-applying insulation coating at predetermined intervals along the rolling direction, a full width at half maximum Fl on the linear thermal strain and a full width at half maximum F2 at an intermediate position between the two linear thermal strains adjacent to each other satisfy 0.00

公开(公告)号：US20210002738A1

公开(公告)日：2021-01-07

申请号：US16975668

申请日：2019-03-19

Applicant: NIPPON STEEL CORPORATION

Inventor： Shuichi YAMAZAKI ,  Kazutoshi TAKEDA ,  Hiroyasu FUJII ,  Toru NAGAI

IPC: C21D8/12 ,  C23C30/00 ,  C09D1/00 ,  C09D7/61 ,  C09D7/40

Abstract: In the present invention, there is provided a coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet, including: a solvent; and one or two more layered clay mineral powders having a specific surface area of 20 m2/g or more. In addition, in the present invention, there is provided a grain-oriented electrical steel sheet including: a base metal; and an insulation coating provided on a surface of the base metal, in which the insulation coating contains SiO2, and one or two of Al2O3 and MgO, and has a porosity of 10% or less.

公开(公告)号：US20250043373A1

公开(公告)日：2025-02-06

申请号：US18923474

申请日：2024-10-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Shuichi YAMAZAKI ,  Kazutoshi TAKEDA ,  Hiroyasu FUJII ,  Toru NAGAI

IPC: C21D8/12 ,  C09D1/00 ,  C09D7/40 ,  C09D7/61 ,  C23C30/00

Abstract: In the present invention, there is provided a coating liquid for forming an insulation coating for a grain-oriented electrical steel sheet, including: a solvent; and one or two more layered clay mineral powders having a specific surface area of 20 m2/g or more. In addition, in the present invention, there is provided a grain-oriented electrical steel sheet including: a base metal; and an insulation coating provided on a surface of the base metal, in which the insulation coating contains SiO2, and one or two of Al2O3 and MgO, and has a porosity of 10% or less.

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：US20250026967A1

公开(公告)日：2025-01-23

申请号：US18714079

申请日：2022-11-29

Applicant: TOAGOSEI CO., LTD. ,  NIPPON STEEL CORPORATION

Inventor： Yoshiaki IWASE ,  Mikako ARAI ,  Kazutoshi TAKEDA ,  Minako FUKUCHI

IPC: C09J133/10 ,  B32B3/26 ,  B32B15/04 ,  B32B15/18 ,  C09J11/06

Abstract: An anaerobic curing adhesive composition of the disclosure contains a polymer or an oligomer having two or more (meth)acryloyl groups in one molecule, a polyfunctional ethylenically unsaturated compound other than the urethane (meth)acrylate, a radical polymerization initiator, and an anaerobic curing catalyst.

公开(公告)号：US20230395291A1

公开(公告)日：2023-12-07

申请号：US18271622

申请日：2022-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyasu FUJII ,  Jun MAKI ,  Kazutoshi TAKEDA ,  Akira AKAGI ,  Yuya FUJII

IPC: H01F1/147 ,  B32B15/18 ,  B32B15/04 ,  C23C22/03 ,  C23C22/82

CPC classification number: H01F1/147 ,  B32B15/18 ,  B32B15/043 ,  C23C22/03 ,  C23C22/82 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2307/714 ,  B32B2307/704 ,  B32B2307/748 ,  B32B2307/206

Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention is a non-oriented electrical steel sheet including a base metal steel sheet and a composite coating film that is formed on surfaces of the base metal steel sheet and includes Zn-containing phosphate and an organic resin, wherein the non-oriented electrical steel sheet contains crystalline aluminum phosphate showing diffraction lines belonging to ICDD No. 01-074-3256 when the composite coating film is measured by a wide-angle X-ray diffraction method.

公开(公告)号：US20230137498A1

公开(公告)日：2023-05-04

申请号：US17918567

申请日：2021-04-16

Applicant: NIPPON STEEL CORPORATION

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

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

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: 3.5 to 4.9%, Mn: 0.05 to 0.20%, Al: 0.05 to 0.45%, P: 0.030% or less, S: 0.0030% or less, N: 0.0030% or less, 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, and satisfying [4.0≤Si+Al≤5.0], 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：US20220341043A1

公开(公告)日：2022-10-27

申请号：US17761958

申请日：2020-09-18

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Shuichi YAMAZAKI ,  Takuya MATSUMOTO ,  Hiroyasu FUJII ,  Masaru TAKAHASHI

IPC: C23C22/20 ,  C21D9/46

Abstract: There is provided a non-oriented electrical steel sheet that includes a base metal steel sheet and an insulating coating film that is formed on a surface of the base metal steel sheet, wherein the insulating coating film mainly contains metal phosphate, organic resin, and water-soluble organic compound, the water-soluble organic compound has an SP value that is within a range of 10.0 to 20.0 (cal/cm3)1/2, the metal phosphate contains aluminum and zinc as metallic elements, and when measurement by an X-ray photoelectron spectroscopy is performed from a surface of the insulating coating film in a thickness direction of the non-oriented electrical steel sheet, a depth at which a strength of a 2p peak of zinc reaches a maximum is present closer to the surface side than a depth at which a strength of a 2p peak of aluminum reaches a maximum, and a maximum value of the strength of the 2p peak of zinc is 1 to 20 times a strength of the 2p peak of aluminum at the depth at which the strength of the 2p peak of zinc reaches a maximum.

公开(公告)号：US20220094218A1

公开(公告)日：2022-03-24

申请号：US17299886

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuo OHSUGI ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H02K1/18 ,  C09J133/08

Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, each of the electrical steel sheets includes an annular core back part; a plurality of fastening parts are provided in the core back part at intervals in a circumferential direction; an adhesion region is formed on an outer circumferential side from the fastening parts in the core back part; and a non-adhesion region is formed on an inner circumferential side from the fastening parts in the core back part.

公开(公告)号：US20220028608A1

公开(公告)日：2022-01-27

申请号：US17312103

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H01F41/02 ,  H02K1/27 ,  H02K1/18 ,  H01F27/245

Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.