公开(公告)号：US20220014051A1

公开(公告)日：2022-01-13

申请号：US17294202

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H02K1/16 ,  H02K1/14 ,  H02K15/02 ,  H01F27/245

Abstract: A laminated core including a plurality of electrical steel sheets stacked on each other, and adhesion parts which are provided between the electrical steel sheets adjacent to each other in an axial direction thereof and adhering the electrical steel sheets to each other, in which each of the electrical steel sheets includes an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, and each of the tooth parts of the electrical steel sheets has an adhesion region provided with the adhesion part having a belt shape extending in the circumferential direction.

公开(公告)号：US20210343458A1

公开(公告)日：2021-11-04

申请号：US17259837

申请日：2019-11-01

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 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/08 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00

Abstract: This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+sol. Al+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：US20210054489A1

公开(公告)日：2021-02-25

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 ,  C22C38/20 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D9/46 ,  C21D8/02

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：US20190316221A1

公开(公告)日：2019-10-17

申请号：US16470078

申请日：2018-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyoshi YASHIKI ,  Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Susumu MUKAWA ,  Takuya MATSUMOTO ,  Koji FUJITA ,  Takashi MOROHOSHI ,  Masafumi MIYAZAKI

IPC: C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/60 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00

Abstract: A non-oriented electrical steel sheet contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn+Sb: 0.050% or less, Si−0.5×Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 μm in a depth direction is less than 0.0100%.

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.