公开(公告)号：US11742129B2

公开(公告)日：2023-08-29

申请号：US17292048

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyasu Fujii ,  Shinsuke Takatani ,  Kazutoshi Takeda

IPC: H02K1/04 ,  H02K1/18 ,  H02K1/30 ,  H02K15/02 ,  H01F27/245 ,  C09J11/04 ,  H01F41/02

CPC classification number: H01F27/245 ,  C09J11/04 ,  H01F41/0233 ,  H02K1/04 ,  H02K1/18 ,  H02K1/30 ,  H02K15/02

Abstract: An adhesively-laminated core includes: a plurality of electrical steel sheets which are stacked on each other and of which both surfaces are coated with an insulation coating; and an adhesion part which is provided between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, wherein an adhesive forming the adhesion part contains an organic resin and an inorganic filler, wherein a 50% particle size of the inorganic filler is 0.2 to 3.5 μm, wherein a 90% particle size of the inorganic filler is 10.0 μm or less, and wherein an amount of the inorganic filler is 5 to 50 parts by mass with respect to 100 parts by mass of the organic resin.

公开(公告)号：US11499059B2

公开(公告)日：2022-11-15

申请号：US16482663

申请日：2018-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi Takeda ,  Yoshiaki Natori ,  Takuya Matsumoto ,  Hiroyoshi Yashiki

IPC: C09D7/61 ,  C09D5/24 ,  H01F1/18 ,  C09D7/40 ,  C09D1/00

Abstract: An electrical steel sheet is described, which has an insulating coating on its surface. The insulating coating is free of chromium and comprises plate-like particles of inorganic compound and a metal phosphate. The plate-like particles of inorganic compound are in the form of secondary particles, which are formed by aggregating primary particles, and present in an amount of not less than 0.1 parts by mass and not greater than 20 parts by mass, with respect to 100 parts by mass of the metal phosphate. The secondary particles have an average particle diameter of no less than 0.05 μm and no greater than 5 μm, and have a specific surface area of 1 to 80 m2/g. The primary particles have an aspect ratio of 50 to 1000. The electrical steel sheet has excellent heat resistance, corrosion resistance, appearance, and insulating properties.

公开(公告)号：US11441215B2

公开(公告)日：2022-09-13

申请号：US16981585

申请日：2019-03-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro Tanaka ,  Takashi Kataoka ,  Noriyoshi Kubota ,  Kazutoshi Takeda

IPC: C22C38/60 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20

Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet including, as a chemical composition, by mass %, C: 0.010% or less, Si: 2.50% to 4.00%, Mn: 0.050% to 1.000%, S+Se: 0.005% or less in total, Sol. Al: 0.005% or less, N: 0.005% or less, Bi+Te+Pb: 0% to 0.0300% in total, Sb: 0% to 0.50%, Sn: 0% to 0.50%, Cr: 0% to 0.50%, Cu: 0% to 1.0%, and a remainder of Fe and impurities; and a tension-applying insulation coating provided on a surface of the base steel sheet, in which, on the surface of the base steel sheet, an arithmetic average roughness Ra along a rolling 90° direction that is a direction perpendicular to a rolling direction is 0.60 μm or less, and when a cross section of the base steel sheet is observed along the rolling 90° direction, recessed parts having a depth of 0.1 μm or more and 2.0 μm or less are present on the surface of the base steel sheet in 1.0/100 μm or more and 6.0/100 μm or less.

公开(公告)号：US20180240579A1

公开(公告)日：2018-08-23

申请号：US15962701

申请日：2018-04-25

Applicant: Nippon Steel Corporation

Inventor： Kazutoshi Takeda ,  Kenji Kosuge ,  Tatsuya Takase ,  Hiroyasu Fujii

IPC: H01F1/18 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02

Abstract: An electrical steel sheet provides: a steel strip (1) for an electrical steel sheet; and an insulating film (2) formed at a surface of the steel strip (1) and containing metal phosphate and organic resin. At least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system. The organic resin contains at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate.

公开(公告)号：US12126217B2

公开(公告)日：2024-10-22

申请号：US17606036

申请日：2020-06-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryu Hirayama ,  Kazutoshi Takeda

IPC: H02K1/18 ,  H01F3/02 ,  H01F27/245 ,  H01F27/26

CPC classification number: H02K1/185 ,  H01F3/02 ,  H01F27/245 ,  H01F27/263

Abstract: What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which an adhesion area ratio of the electrical steel sheet piece by the adhesion part is 1% or more and 60% or less.

公开(公告)号：US12119706B2

公开(公告)日：2024-10-15

申请号：US18281171

申请日：2022-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiaki Natori ,  Hiroyoshi Yashiki ,  Minako Fukuchi ,  Kazutoshi Takeda

IPC: C21D9/46 ,  B21B1/22 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/60 ,  H01F1/147 ,  H02K1/02 ,  H02K15/02 ,  H02K15/12 ,  C21D1/76 ,  C22C38/58

CPC classification number: H02K1/02 ,  B21B1/22 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1244 ,  C21D8/1261 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/60 ,  H01F1/147 ,  H02K15/02 ,  H02K15/12 ,  B21B2001/221 ,  B21B2001/225 ,  C21D1/76 ,  C22C38/58

Abstract: This non-oriented electrical steel sheet contains a base material having a chemical composition including, in mass %, Si: 3.2 to 4.5%, wherein the tensile strength is 550 MPa or more, and a ratio (P120B/Fe700B)B between a peak-to-peak height Fe700B of Fe at 700 eV and a peak-to-peak height P120B of P at 120 eV when crystal grain boundaries are measured through Auger electron spectroscopy is not more than twice a ratio (P120i/Fe700i)i between a peak-to-peak height Fe700i of Fe at 700 eV and a peak-to-peak height P120i of P at 120 eV when the inside of crystals is measured through Auger electron spectroscopy.

公开(公告)号：US12104096B2

公开(公告)日：2024-10-01

申请号：US17296583

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke Takatani ,  Hiroyasu Fujii ,  Kazutoshi Takeda

IPC: C09J163/00 ,  B32B7/12 ,  B32B15/01 ,  C09J11/06 ,  C09J133/12 ,  C09J151/08 ,  H01F41/02 ,  H02K1/12 ,  H02K15/02 ,  C08K5/5399

CPC classification number: C09J163/00 ,  B32B7/12 ,  B32B15/011 ,  C09J11/06 ,  C09J133/12 ,  C09J151/08 ,  H02K1/12 ,  H02K15/02 ,  C08K5/5399 ,  C09J2203/326 ,  H01F41/02

Abstract: Provided is an electric motor using a laminated core in which punched electrical steel sheets are adhered to each other with a high adhesion strength. The laminated core includes: a plurality of electrical steel sheets which are stacked on each other and of which both surfaces are coated with an insulation coating; and an adhesion part which is disposed between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, wherein all sets of the electrical steel sheets adjacent to each other in the stacking direction are adhered to each other by the adhesion parts, wherein the adhesion parts are provided at a plurality of positions between the electrical steel sheets, and wherein the adhesion part is a layer made of an adhesive containing any one or both of an acrylic resin and an epoxy resin and having an SP value of 7.8 to 10.7 (cal/cm3)1/2.

公开(公告)号：US12057248B2

公开(公告)日：2024-08-06

申请号：US17913865

申请日：2021-06-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke Takatani ,  Kazutoshi Takeda ,  Ichiro Tanaka

IPC: H01F1/18 ,  B05D7/14 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  C23C22/07 ,  H01F27/24 ,  H02K1/02

CPC classification number: H01F1/18 ,  B05D7/148 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  C23C22/07 ,  H01F27/24 ,  H02K1/02 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2307/102 ,  B32B2603/00

Abstract: This electrical steel sheet is an electrical steel sheet in which at least part of either or both surfaces of a base steel sheet is coated with an insulation coating having an adhesive ability, wherein a logarithmic decrement of the insulation coating in a temperature range of 25 to 100° C. is 0.3 or less.

公开(公告)号：US11948711B2

公开(公告)日：2024-04-02

申请号：US17761092

申请日：2020-09-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Takashi Kataoka ,  Ichiro Tanaka ,  Haruhiko Atsumi ,  Kazutoshi Takeda ,  Ryutaro Yamagata ,  Nobusato Morishige

IPC: C22C38/00 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/28 ,  C22C38/34 ,  H01F1/147

CPC classification number: H01F1/14783 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1233 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/28 ,  C22C38/34

Abstract: A grain oriented electrical steel sheet includes a base steel sheet, a glass film, and a tension-insulation coating. When a glow discharge emission spectroscopy is conducted from a surface of the glass film toward a depth direction, an analysis starting time Ts, a time TAlp at which Al shows a maximum emission intensity, an Al emission intensity F(TAlp) at the TAlp, a time TSip at which Si shows a maximum emission intensity, and an Al emission intensity F(TSip) at the TSip satisfy 0.05≤F(TSip)/F(TAlp)≤0.50 and 2.0≤(TAlp−Ts)/(TSip−Ts)≤5.0.

公开(公告)号：US11948710B2

公开(公告)日：2024-04-02

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 ,  B32B15/04 ,  B32B15/18 ,  C23C22/03 ,  C23C22/82

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

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.