公开(公告)号：US20240355515A1

公开(公告)日：2024-10-24

申请号：US18548206

申请日：2022-01-17

申请人： FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.

发明人： Weiguo Mou ,  Jiaying Huang

IPC分类号： H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  B22F9/04 ,  C21D1/84 ,  C21D6/00 ,  C22C33/04 ,  C22C38/00 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F41/02

CPC分类号： H01F1/0577 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  C21D1/84 ,  C21D6/007 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F41/0293 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

摘要： Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R≥29 wt. %, R being a rare earth element and containing Nd, wherein Nd is ≥22 wt. %; 0.2-0.75 wt. % of Ti+Nb; 0.05-0.45 wt. % of Cu; 0.955-1.15 wt. % of B; and 58-69 wt. % of Fe, wherein wt. % is the ratio of the mass of each component to the total mass of the components; and the mass ratio of Ti to Nb is (1-5):1. According to the present invention, the matching relationship among the added elements in the R-T-B magnet is further optimized, and an R-T-B magnet with better magnetic properties such as relatively high residual magnetization, coercivity, and squareness can be prepared by using the formula.

公开(公告)号：US20240352567A1

公开(公告)日：2024-10-24

申请号：US18683679

申请日：2022-08-04

申请人： HILLTOP CORPORATION

发明人： Hirokazu KANEKIYO

IPC分类号： C22C45/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16

CPC分类号： C22C45/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16 ,  C22C2200/02 ,  C22C2202/02

摘要： Provided is a method that includes ejecting an Fe—Si—B-based molten alloy containing iron (Fe), boron (B), and silicon (Si) as essential components from a tapping nozzle to a surface of a cooling roll and rotating the cooling roll at a surface speed of 15 m/sec or more and 50 m/sec or less to rapidly cool the Fe—Si—B-based molten alloy on the surface of the cooling roll to manufacture an alloy ribbon, the tapping nozzle includes a single slit formed to have a width of 0.6 mm or more and less than 2.0 mm, the cooling roll has a curvature of 8×10−4 or more and less than 2×10−3, and the method includes passing cooling water in an amount of 0.3 m3/min or more and less than 20 m3/min at 5° C. or more and less than 60° C. through the cooling roll to manufacture a rapidly solidified alloy ribbon having an average thickness of 30 μm or more and less than 55 μm.

公开(公告)号：US12121963B2

公开(公告)日：2024-10-22

申请号：US17438690

申请日：2020-03-13

申请人： NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

发明人： Yusuke Hirayama ,  Akihide Hosokawa ,  Kenta Takagi

IPC分类号： B22F1/054 ,  C30B23/00 ,  C30B29/52 ,  C30B29/60 ,  H01F1/055 ,  H01F1/059 ,  H01F7/02

CPC分类号： B22F1/054 ,  C30B23/00 ,  C30B29/52 ,  C30B29/60 ,  H01F1/0551 ,  H01F1/059 ,  H01F7/02 ,  B22F2301/155 ,  B22F2301/355 ,  C22C2202/02

摘要： A single crystal particle powder having a crystal structure of TbCu7-type of the present invention is represented by the general formula:

[Chemical Formula 1]

(R1-zMz)Tx  (1)

or the general formula:

[Chemical Formula 2]

(R1-zMz)TxNy  (2)

and has a crystal structure of TbCu7-type,

wherein R is at least one element selected from the group consisting of Sm and Nd, T is at least one element selected from the group consisting of Fe and Co, x is 7.0≤x≤10.0, y is 1.0≤y≤2.0, and z is 0.0≤z≤0.3.

公开(公告)号：US12119150B2

公开(公告)日：2024-10-15

申请号：US17288661

申请日：2020-09-24

申请人： LG Chem, Ltd.

发明人： Nakheon Sung ,  Ingyu Kim ,  Soon Jae Kwon ,  Jinhyeok Choe ,  Hyounsoo Uh ,  Tae Hoon Kim

IPC分类号： H01F1/057 ,  B22F1/148 ,  B22F3/10 ,  B22F3/24 ,  C22C38/00 ,  C22C38/06 ,  C22C38/16 ,  H01F41/02 ,  B22F9/20

CPC分类号： H01F1/0577 ,  B22F1/148 ,  B22F3/1003 ,  B22F3/24 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/16 ,  H01F41/0266 ,  B22F2003/248 ,  B22F9/20 ,  B22F2201/11 ,  B22F2301/355 ,  C22C2202/02

摘要： A sintered magnet and a method for producing the same are provided. The method includes producing an R—Fe—B-based magnet powder by a reduction-diffusion method, adding a R—Al—Cu powder as a sintering agent to the R—Fe—B-based magnet powder to form a mixed powder, wherein the R—Al—Cu powder is an alloy of R, Al and Cu, and R is Nd, Pr, Dy, Tb or Ce, and sintering the mixed powder to form a sintered magnet.

公开(公告)号：US20240339252A1

公开(公告)日：2024-10-10

申请号：US18293355

申请日：2021-08-04

申请人： Mitsubishi Electric Corporation

发明人： Akito IWASAKI ,  Yasutaka NAKAMURA ,  Tatsuya KITANO

IPC分类号： H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/04 ,  C22C38/00 ,  H02K1/02

CPC分类号： H01F1/0577 ,  B22F3/16 ,  B22F3/24 ,  B22F9/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  H02K1/02 ,  B22F2003/248 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2200/00 ,  C22C2202/02

摘要： The present disclosure provides a rare earth sintered magnet satisfying the general formula (Nd, La, Sm)—Fe—B-M, where the element M is one or more elements selected from the group consisting of Cu, Al, and Ga, the rare earth sintered magnet including: a main phase including crystal grains based on an R2Fe14B crystal structure; a first subphase that is crystalline and mainly composed of an oxide phase represented by (Nd, La, Sm)—O; and a second subphase that is crystalline and mainly composed of an oxide phase represented by (Nd, La)—O. The concentration of Sm is higher in the first subphase than in the second subphase, and the concentration of the element M is higher in the second subphase than in the first subphase.

公开(公告)号：US12110579B2

公开(公告)日：2024-10-08

申请号：US17397295

申请日：2021-08-09

申请人： VACUUMSCHMELZE GMBH & CO KG

发明人： Niklas Volbers ,  Manuel Demper ,  Joachim Gerster

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

CPC分类号： 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

摘要： 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：US20240327960A1

公开(公告)日：2024-10-03

申请号：US18439389

申请日：2024-02-12

申请人： HONDA MOTOR CO., LTD.

发明人： Yoshiyuki NAKAZAWA ,  Hitoshi ITAMI ,  Akihito NINOMIYA ,  Ryutaro KATO

IPC分类号： C22C38/02 ,  C21D6/00 ,  C21D8/12

CPC分类号： C22C38/02 ,  C21D6/008 ,  C21D8/1227 ,  C21D8/1233 ,  C21D8/1272 ,  C22C2202/02

摘要： A soft magnetic steel sheet is manufactured by mixing an amount of molten scrap iron, an amount of substantially pure molten iron and an amount of substantially pure molten silicon so as to produce a molten alloy containing Fe as a base material, 1.0 to 7.0 wt % of Si, and 0.1 to 1.0 wt % of Cu, forming a soft magnetic steel sheet by subjecting the molten alloy to a liquid rapid cooling single roller process, and heat treating the soft magnetic steel sheet in an inert atmosphere at 600 to 1,200° 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

申请人： Central South University

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

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

CPC分类号： C22C30/00 ,  C22C1/02 ,  C22F1/16 ,  H01F1/14708 ,  C22C2202/02

摘要： 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.

公开(公告)号：US12106892B2

公开(公告)日：2024-10-01

申请号：US17329741

申请日：2021-05-25

申请人： Ford Global Technologies, LLC

发明人： Chuanbing Rong ,  Feng Liang ,  Leyi Zhu ,  Michael W. Degner

IPC分类号： H01F41/02 ,  B05C5/02 ,  B22F9/08 ,  B22F10/00 ,  B22F10/62 ,  B22F12/53 ,  B29C64/106 ,  B29C64/295 ,  H01F1/12 ,  B22F3/115 ,  B22F10/10 ,  B22F10/31 ,  B22F12/20 ,  B29C64/209 ,  B33Y10/00 ,  B33Y30/00

CPC分类号： H01F41/0253 ,  B05C5/027 ,  B22F9/08 ,  B22F10/00 ,  B22F10/62 ,  B22F12/53 ,  B29C64/106 ,  B29C64/295 ,  H01F1/12 ,  H01F41/0206 ,  B22F3/115 ,  B22F2009/0876 ,  B22F2009/088 ,  B22F10/10 ,  B22F10/31 ,  B22F12/20 ,  B29C64/209 ,  B33Y10/00 ,  B33Y30/00 ,  C22C2202/02

摘要： A three-dimensional magnetic printer includes at least one induction head assembly including an induction heater to heat magnetic material to form an alloy melt and at least one nozzle operable to eject the alloy melt, a coating apparatus, and a base aligned with the at least one nozzle. The induction head assembly deposits at least one alloy melt layer and the coating apparatus forms at least one insulating layer onto the base in accordance with a predetermined pattern to form a three-dimensional article.

公开(公告)号：US12104219B2

公开(公告)日：2024-10-01

申请号：US18096276

申请日：2023-01-12

申请人： NIPPON STEEL CORPORATION

发明人： Ichiro Tanaka ,  Ryutaro Yamagata ,  Nobusato Morishige ,  Takashi Kataoka ,  Masaru Takahashi

IPC分类号： C21D9/46 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/147

CPC分类号： C21D9/46 ,  C21D3/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/147 ,  C22C2202/02

摘要： Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to the steel sheet is provided. The grain-oriented electrical steel sheet is provided with a base steel sheet having a chemical composition containing C: 0.005% or less, Si: 2.5 to 4.5%, Mn: 0.050 to 1.000%, a total of S and Se: 0.005% or less, sol. Al: 0.005% or less, and N: 0.005% or less and having a balance of Fe and impurities and a primary coating having Mg2 SiO4 as a main constituent formed on a surface of the base steel sheet. A peak position of Al emission intensity obtained when conducting elemental analysis by glow discharge spectrometry from a surface of the primary coating in a thickness direction is present in a range of 2.0 to 12.0 μm from a surface of the primary coating to the thickness direction. A sum of perimeters of the Al oxides at the peak position of Al emission intensity is 0.20 to 1.00 μm/μm2, and a number density of Al oxides is 0.02 to 0.20/μm2.