公开(公告)号：US20220029478A1

公开(公告)日：2022-01-27

申请号：US17297617

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke TAKATANI ,  Hiroyasu FUJII ,  Kazutoshi TAKEDA

IPC: H02K1/12 ,  H02K15/02

Abstract: A laminated core includes a plurality of electrical steel sheets which are stacked on each other and of each of which both surfaces are coated with an insulation coating; and an adhesion part which is provided between the electrical steel sheets adjacent in the stacking direction and adheres the electrical steel sheets to each other, wherein an adhesive for forming the adhesion part includes a first phase and a second phase, wherein the adhesion part has a sea-island structure of the first phase which is a sea structure portion and the second phase which is an island structure portion, wherein the first phase contains an epoxy resin, an acrylic resin, and a curing agent, wherein the first phase has an SP value of 8.5 to 10.7 (cal/cm3)1/2, wherein the second phase contains an elastomer, and wherein the second phase has an SP value of 7.5 to 8.4 (cal/cm3)1/2.

公开(公告)号：US20200176156A1

公开(公告)日：2020-06-04

申请号：US16628983

申请日：2018-07-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke TAKATANI ,  Shunsuke OKUMURA ,  Shohji NAGANO ,  Takashi KATAOKA

IPC: H01F1/147 ,  C22C38/20 ,  C22C38/34

Abstract: A grain-oriented electrical steel sheet includes: a steel sheet; an oxide layer including SiO2 that is formed on the steel sheet; and a tension-insulation coating that is formed on the oxide layer, in which the steel sheet includes, as a chemical composition, by mass %, C: 0.085% or less, Si: 0.80% to 7.00%, Mn: 1.00% or less, acid-soluble Al: 0.065% or less, S: 0.013% or less, Cu: 0% to 0.80%, N: 0% to 0.012%, P: 0% to 0.50%, Ni: 0% to 1.00%, Sn: 0% to 0.30%, Sb: 0% to 0.30%, and a remainder of Fe and impurities, the tension-insulation coating includes a chromium compound, and the Fe content in the oxide layer and the tension-insulation coating is 70 mg/m2 to 250 mg/m2.

公开(公告)号：US20240209482A1

公开(公告)日：2024-06-27

申请号：US18286681

申请日：2022-04-13

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

Inventor： Kazutoshi TAKEDA ,  Shinsuke TAKATANI ,  Ryu HIRAYAMA ,  Minako FUKUCHI ,  Yoshiaki IWASE ,  Makoto NIWA ,  Makoto HIRAKAWA

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147 ,  H01F1/18 ,  H02K1/02 ,  H02K15/02

CPC classification number: C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/14791 ,  H01F1/18 ,  H02K15/024 ,  H02K1/02

Abstract: This electrical steel sheet contains: as a chemical composition, in a unit of mass %, 2.5% to 3.9% of Si; 0.001% to 3.0% of Al; and 0.05% to 5.0% of Mn, the remainder being Fe and impurities, and, on one surface or both surfaces thereof, an insulating coating containing a curing accelerator is formed.

公开(公告)号：US20240190119A1

公开(公告)日：2024-06-13

申请号：US18286501

申请日：2022-04-13

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

Inventor： Kazutoshi TAKEDA ,  Shinsuke TAKATANI ,  Ryu HIRAYAMA ,  Minako FUKUCHI ,  Yoshiaki IWASE ,  Makoto NIWA ,  Makoto HIRAKAWA

IPC: B32B37/12 ,  B30B9/28 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  B32B37/10 ,  C09J5/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H02K1/02 ,  H02K15/02

CPC classification number: B32B37/12 ,  B30B9/28 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  B32B37/10 ,  C09J5/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H02K1/02 ,  H02K15/02 ,  B32B2309/12 ,  B32B2311/30 ,  C22C2202/02

Abstract: This bonded and stacked core manufacturing method is for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerator having an average viscosity of 0.01 Pa·s to 100 Pa·s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.

公开(公告)号：US20240186042A1

公开(公告)日：2024-06-06

申请号：US18285440

申请日：2022-05-27

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke TAKATANI ,  Kazutoshi TAKEDA ,  Masaru TAKAHASHI ,  Yoshiyuki USHIGAMI

IPC: H01F1/18 ,  C21D1/74 ,  C21D6/00 ,  C21D8/02 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/60 ,  C23C22/82 ,  C23C28/04

CPC classification number: H01F1/18 ,  C21D1/74 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0284 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/60 ,  C23C22/82 ,  C23C28/04

Abstract: Provided is a grain oriented electrical steel sheet including a base metal steel sheet, an intermediate layer and an insulation coating, wherein: the intermediate layer is an oxide film; an average thickness of the oxide film is 2-500 nm; the insulation coating is a phosphate coating; an average thickness of the insulation coating is 0.1-10 μm. When grazing incidence X-ray diffraction is performed on the phosphate coating using a Co-Kα excitation source, the X-ray diffraction pattern has a diffraction peak originating from cristobalite-type aluminum phosphate at a diffraction angle of 2θ=24.8°; a half value width FWHM0.5 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=0.5° and a half value width FWHM1.0 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=1.0° satisfy 0.20°≤FWHM0.5≤2.00°, 0.20°≤FWHM1.0≤2.00°, and 0°≤|F.WHM0.5−FWHM1.0|≤1.00°.

公开(公告)号：US20240158895A1

公开(公告)日：2024-05-16

申请号：US18284263

申请日：2022-04-06

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Takashi KATAOKA ,  Shinsuke TAKATANI ,  Yuuki KOGAKURA ,  Yuki KUNITA

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C23C22/07

CPC classification number: C22C38/02 ,  C21D6/008 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/004 ,  C22C38/04 ,  C23C22/07

Abstract: This grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the base steel sheet includes an iron-based oxide layer containing an iron-based oxide on an insulating coating side, the insulating coating includes an intermediate layer formed on a base steel sheet side and containing a crystalline metal phosphate, and a tension coating layer formed on a surface side of the insulating coating, an average thickness of the iron-based oxide layer is 0.10 to 1.50 μm, an average thickness of the intermediate layer is 0.3 to 10.0 μm, an average thickness of the insulating coating is 2.0 to 10.0 μm, the crystalline metal phosphate of the intermediate layer is one or two or more of zinc phosphate, manganese phosphate, iron phosphate, and zinc calcium phosphate, the tension coating layer contains a metal phosphate and silica, and an amount of the silica in the tension coating layer is 20 to 60 mass %.

公开(公告)号：US20240047107A1

公开(公告)日：2024-02-08

申请号：US18276857

申请日：2022-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Minako FUKUCHI ,  Yoshiaki NATORI ,  Hiroyasu FUJII ,  Shinsuke TAKATANI

IPC: H01F1/147 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46 ,  C21D6/00 ,  C23C22/03

CPC classification number: H01F1/14783 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C23C22/03 ,  C22C2202/02

Abstract: This non-oriented electrical steel sheet includes a base steel sheet (10); and an insulation coating (20) formed on a surface of the base steel sheet (10), in which the insulation coating (20) contains a metal phosphate and an organic resin, an arithmetic mean of a center line average roughness Ra75 of the insulation coating (20) in a rolling direction of the base steel sheet (10) and a center line average roughness Ra75 of the insulation coating (20) in a direction perpendicular to the rolling direction is 0.20 to 0.50 μm, and the amount of nitrogen in the insulation coating (20) is 0.05 to 5.00 mass %.

公开(公告)号：US20230253140A1

公开(公告)日：2023-08-10

申请号：US18014352

申请日：2021-07-06

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

Inventor： Kazutoshi TAKEDA ,  Shinsuke TAKATANI ,  Ryu HIRAYAMA ,  Yoshiaki IWASE ,  Makoto NIWA ,  Masashi YAMADA

IPC: H01F27/26 ,  C09J133/20 ,  C09J11/04 ,  C09J11/06

CPC classification number: H01F27/263 ,  C09J133/20 ,  C09J11/04 ,  C09J11/06 ,  C09J2400/163

Abstract: This adhesively-laminated core manufacturing method is a method for manufacturing an adhesively-laminated core by punching a plurality of steel sheet parts while a strip-shaped steel sheet is fed and laminating the steel sheet parts via an adhesive, and includes a step of forming a curing acceleration portion by applying and drying a curing accelerator on one or both surfaces of the strip-shaped steel sheet before a pressing oil is applied, and a step of applying the pressing oil to a surface of the curing acceleration portion.

公开(公告)号：US20230064468A1

公开(公告)日：2023-03-02

申请号：US17795432

申请日：2021-06-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro TANAKA ,  Kazutoshi TAKEDA ,  Minako FUKUCHI ,  Shinsuke TAKATANI ,  Shuichi YAMAZAKI

IPC: H01F1/18 ,  B32B15/01 ,  H01F41/02

Abstract: This electrical steel sheet includes a base steel sheet, a first insulation coating formed on a first surface of the base steel sheet and having adhesiveness, and a second insulation coating formed on a second surface of the base steel sheet which is a back surface to the first surface and having adhesiveness, in which an average pencil hardness of the first insulation coating is HB or higher and 3H or lower, and an average pencil hardness of the second insulation coating is higher than the average pencil hardness of the first insulation coating.

公开(公告)号：US20220119905A1

公开(公告)日：2022-04-21

申请号：US17421938

申请日：2020-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke TAKATANI ,  Yoshiyuki USHIGAMI ,  Shuichi NAKAMURA ,  Shohji NAGANO ,  Shunsuke OKUMURA

IPC: C21D9/46 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/60 ,  C23G1/02 ,  C23C28/04

Abstract: A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.