公开(公告)号：US11915860B2

公开(公告)日：2024-02-27

申请号：US17294955

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryu Hirayama ,  Kazutoshi Takeda

IPC: H01F27/00 ,  H01F41/02 ,  H01F27/245 ,  H02K1/18 ,  H01F27/26

CPC classification number: H01F41/0233 ,  H01F27/245 ,  H02K1/18 ,  H01F27/26 ,  H02K2201/09 ,  H02K2213/03

Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.

公开(公告)号：US11855485B2

公开(公告)日：2023-12-26

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

CPC classification number: 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：US11535943B2

公开(公告)日：2022-12-27

申请号：US16343452

申请日：2017-10-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi Takeda ,  Tomoya Suenaga ,  Shuichi Yamazaki ,  Masaru Takahashi

IPC: C21D3/04 ,  C23F11/18 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C23C22/00 ,  H01F1/147

Abstract: A grain-oriented electrical steel sheet has a steel sheet and an insulating coating which is formed on a surface of the steel sheet. In the insulating coating, a metal phosphate and a colloidal silica are contained, the colloidal silica is contained in an amount of 20 to 150 parts by mass with respect to 100 parts by mass of the metal phosphate, one or more kinds of fine particles selected from the group consisting of silicon carbide, silicon nitride, aluminum nitride, boron nitride, sialon, and cordierite are further contained in an amount of 0.5 to 7 parts by mass with respect to 100 parts by mass of the metal phosphate, an average particle size of the fine particles is 0.3 to 7.0 μm, crystallized ratio of the metal phosphate is 2% to 40%, and chromium is not contained.

公开(公告)号：US11440846B2

公开(公告)日：2022-09-13

申请号：US14766560

申请日：2013-05-27

Applicant: Nippon Steel Corporation

Inventor： Regis Lemaitre ,  Ludger Lahn ,  Carsten Schepers ,  Shuichi Yamazaki ,  Kazutoshi Takeda ,  Masaru Takahashi ,  Hirohiko Sato ,  Koji Kanehashi

IPC: C04B28/34 ,  C23C22/18 ,  C23C22/20 ,  C23C22/22 ,  H01F1/18 ,  C04B14/06 ,  C23C22/74 ,  C23C22/08 ,  C21D8/12 ,  C04B111/00

Abstract: A solution for forming an insulation coating of grain-oriented electrical steel sheet includes an aqueous solution prepared by mixing a phosphate solution and colloidal silica. Chromium is not added to the aqueous solution. The colloidal silica includes silica particles surface-modified by an aluminate or is prepared by adding an aluminate to colloidal silica such as conventional colloidal silica.

公开(公告)号：US11279985B2

公开(公告)日：2022-03-22

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 ,  H01F1/147 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

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：US11053574B2

公开(公告)日：2021-07-06

申请号：US16470122

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

Abstract: A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% 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, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si−0.5×Mn: 2.0% or more, and Si+0.5×Mn: 3.8% or more.