公开(公告)号：US12230425B2

公开(公告)日：2025-02-18

申请号：US17436260

申请日：2020-02-27

Applicant: Höganäs AB (Publ)

Inventor： Hilmar Vidarsson ,  Björn Skårman ,  Martin Häggblad Sahlberg ,  Samrand Shafeie

IPC: H01F1/147 ,  B22F1/054 ,  B22F1/142 ,  B22F9/04 ,  B22F9/08 ,  C22C1/04 ,  C22C22/00 ,  C22C32/00 ,  H01F1/047 ,  H01F41/02

Abstract: There is provided solid composite material comprising an alloy based on manganese, aluminum and optionally carbon, and dispersed nanoparticles made from a material X, as well as a method of manufacturing the same. The material X is different from manganese, aluminum, carbon or a mixture thereof and satisfying the following requirements the melting temperature of the material X is 1400° C. or higher, preferably 1500° C. or higher; and the material X comprises a metal. The composite material is suitable as a magnetic material or as a precursor of a magnetic material, and allows obtaining improved magnetic properties as compared to existing alloys based on manganese, aluminum and optionally carbon due the presence of the nanoparticles. A magnetic material in shaped form comprising the composite material and an electric or electronic device comprising the magnetic material are also part of the invention.

公开(公告)号：US12211633B2

公开(公告)日：2025-01-28

申请号：US17769272

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Tesshu Murakawa ,  Miho Tomita ,  Hiroshi Fujimura ,  Satoshi Kano

IPC: H01F1/147 ,  C21D1/30 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/16 ,  C22C38/60

Abstract: What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less and one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total with a remainder including Fe and impurities, in which a recrystallization rate is 1% to 99% in a metallographic structure, a sheet thickness is 0.50 mm or less, and, in the case of measuring a magnetic flux density B50 after annealing the non-oriented electrical steel sheet at 800° C. for two hours, a magnetic flux density B50 in a 45° direction with respect to a rolling direction is 1.75 T or more.

公开(公告)号：US20250022639A1

公开(公告)日：2025-01-16

申请号：US18700221

申请日：2022-10-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Hiroyoshi YASHIKI ,  Minako FUKUCHI

IPC: H01F1/147 ,  B32B15/04 ,  B32B15/18 ,  C21D1/30 ,  C21D1/74 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60

Abstract: Provided is a non-oriented electrical steel sheet including a base steel sheet and an insulating coating film formed on a surface of the base steel sheet, wherein the base steel sheet has a chemical composition containing, in mass %, C: 0.0030% or less, Si: 3.2 to 6.5%, Mn: 0.05 to 3.5%, P: 0.005 to 0.10%, S: 0.0030% or less, Al: 1.0% of less, Ti: 0.0030% or less, B: 0.0010% or less, Mo: 0.030% or less, V: 0.0010% or less, Ca: 0 to 0.0050%, Mg: 0 to 0.0050%, and REM: 0 to 0.0050%, with a balance being Fe and impurities, and satisfying [S-5/3×Mg-4/5×Ca-1/4×REM 0].

公开(公告)号：US12195818B2

公开(公告)日：2025-01-14

申请号：US17421975

申请日：2020-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinsuke Takatani ,  Yoshiyuki Ushigami ,  Shuichi Nakamura ,  Shunsuke Okumura ,  Shohji Nagano

IPC: C21D9/46 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/32 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60 ,  H01F1/147

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.

公开(公告)号：US12191065B2

公开(公告)日：2025-01-07

申请号：US17201801

申请日：2021-03-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya Ishida ,  Makoto Yamamoto ,  Katsutoshi Uji ,  Yuya Ishida ,  Mitsuru Odahara

IPC: H01F1/147 ,  H01F1/20 ,  H01F1/22 ,  H01F1/24 ,  H01F27/255 ,  H01F41/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si, wherein the oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from the alloy particle side. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Si content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, and the third oxide layer is a layer where Si content takes a local maximum value.

公开(公告)号：US12165794B2

公开(公告)日：2024-12-10

申请号：US16260715

申请日：2019-01-29

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Akito Hasegawa ,  Syota Goto ,  Masakazu Hosono ,  Hajime Amano ,  Isao Nakahata

IPC: H01F1/147 ,  B22D23/00 ,  B22F1/07 ,  C21D1/26 ,  C21D1/30 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C21D9/52 ,  C22C33/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C45/00 ,  C22C45/02 ,  C22C45/04 ,  H01F1/153 ,  B22F9/02 ,  B22F9/04 ,  C22C38/40 ,  C22C38/52

Abstract: A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.

公开(公告)号：US12163066B2

公开(公告)日：2024-12-10

申请号：US17297737

申请日：2019-11-26

Applicant: POSCO

Inventor： Bongwoo Ha ,  Jung-Woo Kim ,  Taeyoung No ,  Dong-Gyu Lee

IPC: C09J5/04 ,  B32B7/12 ,  B32B15/01 ,  B32B37/12 ,  C09J7/28 ,  H01F1/147 ,  H01F41/02

Abstract: An embodiment of the present invention provides an electrical steel sheet including: an upper adhesive layer positioned on an upper surface of an electrical steel sheet; and an lower adhesive layer positioned on a lower surface of the electrical steel sheet, wherein the upper adhesive layer has a pencil hardness of F or lower, and the lower adhesive layer has a pencil hardness of H or higher.

公开(公告)号：US12145842B2

公开(公告)日：2024-11-19

申请号：US18273780

申请日：2022-12-03

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Haixin Chang ,  Gaojie Zhang ,  Hao Wu

IPC: C01B19/00 ,  B82Y25/00 ,  C30B9/06 ,  C30B29/46 ,  H01F1/147 ,  B82Y40/00

Abstract: The present invention provides a Ga-based van der Waals room-temperature ferromagnetic crystal material, preparation and use thereof, which belong to the technical field of nano magnetic material preparation. The materials include Fe3-aGabTe2 (a=−0.3 to 0.1, b=0.8 to 1.2) and Fe5-c GeGadTe2 (c=−0.2 to 0.2, d=0.01 to 0.5). The growth method of Fe3-aGabTe2 (a=−0.3 to 0.1, b=0.8 to 1.2) is a self-flux method, using excess Ga and Te as flux to grow crystals. The growth method of Fe5-c GeGadTe2 (c=−0.2 to 0.2, d=0.01 to 0.5) uses iodine as a transport agent to grow crystals. The Ga-based van der Waals room-temperature ferromagnetic crystal Fe3-a GabTe2 (a=−0.3 to 0.1, b=0.8 to 1.2) and Fe5-cGeGadTe2 (c=−0.2 to 0.2, d=0.01 to 0.5) materials have Curie temperature of 330 K to 367 K and 320 K to 345 K, and the saturation magnetic moments are 50 emu/g to 57.2 emu/g and 80 emu/g to 88.5 emu/g, respectively.

公开(公告)号：US12110579B2

公开(公告)日：2024-10-08

申请号：US17397295

申请日：2021-08-09

Applicant: VACUUMSCHMELZE GMBH & CO KG

Inventor： Niklas Volbers ,  Manuel Demper ,  Joachim Gerster

IPC: C22F1/16 ,  C21D1/04 ,  C21D6/00 ,  C21D8/12 ,  C22C30/00 ,  H01F1/147 ,  H02K15/02

CPC classification number: C22F1/16 ,  C21D1/04 ,  C21D8/1244 ,  C22C30/00 ,  H01F1/147 ,  H02K15/02 ,  C21D6/007 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C2202/02

Abstract: A method of producing a CoFe alloy strip is provided. The method comprises hot rolling a CoFe alloy to form a hot rolled strip, followed by quenching the strip from a temperature above 700° C. to a temperature of 200° C. The CoFe alloy comprises an order/disorder temperature To/d and a ferritic/austenitic transformation temperature Tα/γ, wherein Tα/γ>To/d. The method further comprises cold rolling the hot rolled strip, after cold rolling, continuous annealing the strip at a maximum temperature T1, wherein 500° C.

公开(公告)号：US20240327959A1

公开(公告)日：2024-10-03

申请号：US18704911

申请日：2023-07-10

Applicant: Central South University

Inventor： Zhiming LI ,  Penghua GE ,  Dingshun YAN ,  Kefu GAN ,  Yong ZHANG

IPC: C22C30/00 ,  C22C1/02 ,  C22F1/16 ,  H01F1/147

CPC classification number: C22C30/00 ,  C22C1/02 ,  C22F1/16 ,  H01F1/14708 ,  C22C2202/02

Abstract: A high-strength and tough multi-component soft magnetic alloy and preparation method thereof are provided. The high-strength and tough multi-component soft magnetic alloy is composed of the following components in atomic percentage: Fe 32-45%, Co 24-29%, Ni 24-29%, Al 2.5-8%, Ti 1.5-3.5%, Ta 1.0-5%, Nb 0-2%, and Mo 0-2%. The multi-component alloys prepared by the present invention exhibit a face-centered cubic structure of the matrix, featured with high strength, high ductility, low coercivity and relatively high saturation magnetization. These properties make it suitable for manufacturing critical components for applications in industries such as electrical engineering, automatic control, mobile communications, and others.