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：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：US12073989B2

公开(公告)日：2024-08-27

申请号：US17248203

申请日：2021-01-14

申请人： SEIKO EPSON CORPORATION

发明人： Yasutaka Matsumoto

IPC分类号： H01F41/02 ,  B22F1/08 ,  B22F1/102 ,  B22F1/14 ,  B22F1/16 ,  B22F3/16 ,  H01F1/22

CPC分类号： H01F41/0246 ,  B22F1/08 ,  B22F1/102 ,  B22F1/14 ,  B22F1/16 ,  B22F3/16 ,  H01F1/22 ,  B22F2201/03 ,  B22F2202/01 ,  B22F2202/11 ,  B22F2202/13 ,  B22F2999/00 ,  B22F1/102 ,  B22F1/08 ,  C22C33/02 ,  C22C2202/02 ,  B22F2999/00 ,  B22F1/16 ,  B22F1/08 ,  C22C33/02 ,  C22C2202/02

摘要： A method for producing a powder magnetic core includes applying energy to a surface of a soft magnetic powder coated with an insulator, exposing the soft magnetic powder to an atmosphere having an atmospheric pressure dew point of −30° C. or higher and 15° C. or lower, and forming a molded body by pressing the soft magnetic powder at 20 MPa or more and 400 MPa or less.

公开(公告)号：US20240274333A1

公开(公告)日：2024-08-15

申请号：US18568831

申请日：2022-06-13

申请人： YANTAI ZHENGHAI MAGNETIC MATERIAL CO., LTD. ,  NANTONG ZHENGHAI MAGNET CO., LTD.

发明人： Bingqiang SHI ,  Zhongxin AN ,  Chubo DENG ,  Lei LIU ,  Yanmei JIN

IPC分类号： H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  B22F9/04 ,  C22C33/02 ,  C22C35/00 ,  C22C38/00 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  H01F41/02

CPC分类号： H01F1/0577 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  C22C33/0207 ,  C22C33/0278 ,  C22C35/005 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  H01F41/0266 ,  H01F41/0293 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2201/20 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

摘要： A low-cost high-coercivity LaCe-rich neodymium-iron-boron permanent magnet, and a preparation method therefor and the use thereof are provided. The permanent magnet is prepared by mixing and sintering an LaCe-free and HRE-free neodymium-iron-boron main phase alloy and an LaCe-M alloy. An LaCe-free main phase alloy and an LaCe-M auxiliary phase alloy are respectively smelted at first, and then, the same are subjected to powder preparation, mixing, pressing, and sintering, thereby avoiding LaCe entering main phase crystal grains. The depth and concentration of HRE diffused into the magnet are effectively improved by using the characteristics of a low melting point and high flowability of an LaCe-rich crystal boundary phase, thereby improving the uniformity of components and structure distribution in the magnet.

公开(公告)号：US20240191332A1

公开(公告)日：2024-06-13

申请号：US18279539

申请日：2022-12-09

申请人： TPR Co., Ltd.

发明人： Koki Maeda ,  Fukutoshi Uchida

IPC分类号： C22C38/58 ,  B22F3/00 ,  B22F3/16 ,  B22F3/26 ,  C22C33/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02

CPC分类号： C22C38/58 ,  B22F3/004 ,  B22F3/16 ,  B22F3/26 ,  C22C33/0242 ,  C22C33/0285 ,  C22C38/002 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00

摘要： The present invention solves a novel problem of corrosive wear that occurs in the use of a valve seat in an internal combustion engine using a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve seat used in an internal combustion engine using a hydrogen gas fuel, in which the Cr content is 6% by mass to 23% by mass, the Mo content is 5% by mass to 20% by mass, the Cu content is 10% by mass to 23% by mass, the Co content is 3% by mass or more, and a total content of Cr, Mo, and Co is 14% by mass to 47% by mass.

公开(公告)号：US20240183007A1

公开(公告)日：2024-06-06

申请号：US18437721

申请日：2024-02-09

申请人： NAECO, LLC

发明人： Guenther Horn ,  David C. Bergmann ,  Frederick C. Bergmann

IPC分类号： C22C1/04 ,  B22F1/16 ,  B22F3/00 ,  B22F3/02 ,  B22F3/16 ,  B22F3/20 ,  B22F9/04 ,  C22C1/05 ,  C22C32/00

CPC分类号： C22C1/0425 ,  B22F1/16 ,  B22F3/002 ,  B22F3/02 ,  B22F3/16 ,  B22F3/20 ,  B22F9/04 ,  C22C1/05 ,  C22C32/0084 ,  B22F2003/208 ,  B22F2009/043 ,  B22F2301/10 ,  B22F2302/40 ,  B22F2998/10 ,  B22F2999/00

摘要： A method of producing a metal matrix composite by extruding a billet including both a metallic material and a non-metallic material through a die to form a metal matrix composite extrudate, where the non-metallic material is distributed evenly along a longitudinal length of the billet, where, during extrusion, a temperature of the billet does not exceed a melting temperature of the metallic material; and where the metal matrix composite extrudate has an extrusion ratio of at least 20:1.

公开(公告)号：US11998982B2

公开(公告)日：2024-06-04

申请号：US17166475

申请日：2021-02-03

申请人： Desktop Metal, Inc.

发明人： George Hudelson ,  Emanuel M. Sachs ,  Glenn A. Jordan ,  Midnight Zero

IPC分类号： B33Y30/00 ,  B22F1/10 ,  B22F3/00 ,  B22F3/16 ,  B22F3/18 ,  B22F3/24 ,  B22F10/00 ,  B22F10/14 ,  B22F10/37 ,  B22F12/52 ,  B22F12/57 ,  B22F12/63 ,  B29C64/194 ,  B29C64/214 ,  B29C64/218 ,  B29C64/236 ,  B29C64/329 ,  B29C64/343 ,  B33Y10/00 ,  B33Y40/00 ,  H05K3/10 ,  H05K3/12 ,  B22F10/28 ,  B22F12/00 ,  B29C64/165 ,  B33Y50/02

CPC分类号： B22F3/004 ,  B22F1/10 ,  B22F3/16 ,  B22F3/18 ,  B22F3/24 ,  B22F10/00 ,  B22F10/14 ,  B22F10/37 ,  B22F12/52 ,  B22F12/57 ,  B22F12/63 ,  B29C64/194 ,  B29C64/214 ,  B29C64/218 ,  B29C64/236 ,  B29C64/329 ,  B29C64/343 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  H05K3/102 ,  H05K3/1275 ,  B22F2003/247 ,  B22F10/28 ,  B22F12/224 ,  B22F2998/10 ,  B22F2999/00 ,  B29C64/165 ,  B33Y50/02 ,  H05K2203/0126 ,  H05K2203/0143 ,  H05K2203/1131 ,  B22F2999/00 ,  B22F3/004 ,  B22F2201/20 ,  B22F2998/10 ,  B22F10/10 ,  B22F3/004 ,  B22F2203/00 ,  B22F3/02 ,  B22F1/145 ,  B22F10/20 ,  B22F2999/00 ,  B22F10/10 ,  B22F10/00 ,  B22F3/004 ,  B22F2998/10 ,  B22F10/00 ,  B22F3/004 ,  B22F2203/00 ,  B22F3/02 ,  B22F1/145 ,  B22F10/10 ,  B22F2999/00 ,  B22F10/10 ,  B22F3/004 ,  B22F2203/00 ,  B22F2998/10 ,  B22F10/14 ,  B22F3/004 ,  B22F2203/00 ,  B22F3/02 ,  B22F1/145 ,  B22F10/28 ,  B22F2998/10 ,  B22F10/14 ,  B22F3/004 ,  B22F2203/00 ,  B22F3/02 ,  B22F1/145 ,  B22F10/14 ,  B22F2999/00 ,  B22F12/52 ,  B22F3/004 ,  B22F2203/00 ,  B22F2999/00 ,  B22F10/14 ,  B22F3/004 ,  B22F2999/00 ,  B22F12/52 ,  B22F10/14 ,  B22F3/004 ,  B22F2999/00 ,  B22F10/14 ,  B22F3/004 ,  B22F2203/00 ,  B22F2998/10 ,  B22F2203/00 ,  B22F3/004 ,  B22F1/145 ,  B22F3/02 ,  B22F10/20 ,  B22F10/10 ,  B22F2998/10 ,  B22F10/00 ,  B22F2203/00 ,  B22F3/004 ,  B22F1/145 ,  B22F3/02 ,  B22F10/10

摘要： A system and corresponding method for additive manufacturing of a three-dimensional (3D) object to improve packing density of a powder bed used in the manufacturing process. The system and corresponding method enable higher density packing of the powder. Such higher density packing leads to better mechanical interlocking of particles, leading to lower sintering temperatures and reduced deformation of the 3D object during sintering. An embodiment of the system comprises means for adjusting a volume of a powder metered onto a top surface of the powder bed to produce an adjusted metered volume and means for spreading the adjusted metered volume to produce a smooth volume for forming a smooth layer of the powder with controlled packing density across the top surface of the powder bed. The controlled packing density enables uniform shrinkage, without warping, of the 3D object during sintering to produce higher quality 3D printed objects.

公开(公告)号：US20240170206A1

公开(公告)日：2024-05-23

申请号：US18284308

申请日：2022-02-24

申请人： PROTERIAL, LTD.

发明人： Kouta SAITOU ,  Futoshi KUNIYOSHI

IPC分类号： H01F41/02 ,  B22F3/16 ,  B22F9/02 ,  B22F9/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F1/057

CPC分类号： H01F41/0253 ,  B22F3/16 ,  B22F9/023 ,  B22F9/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  B22F2009/044 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02 ,  H01F1/0577

摘要： A method for producing an R-T-B-based sintered magnet comprises a sintering step for sintering a shaped product of R-T-B-based alloy powder. This sintering step includes: a first step for heating the shaped product at a first sintering temperature T1 to prepare a first sintered body; a cooling step for lowering the temperature of the first sintered body to a cooling temperature T0; and a second step for heating the first sintered body at a second sintering temperature T2 to prepare a second sintered body. The first sintering temperature T1 and the second sintering temperature T2 are higher than 900° C., and the cooling temperature T0 is 900° C. or lower. A first sintering time t1 for which the first sintering temperature T1 is maintained in the first step is shorter than a second sintering time t2 for which the second sintering temperature T2 is maintained in the second step.

公开(公告)号：US20240167555A1

公开(公告)日：2024-05-23

申请号：US18517254

申请日：2023-11-22

申请人： Miba Sinter Austria GmbH

发明人： Horst ROESSLER

IPC分类号： F16H55/06 ,  B21D53/28 ,  B22F3/16 ,  B22F5/08 ,  F16H55/17

CPC分类号： F16H55/06 ,  B21D53/28 ,  B22F3/162 ,  B22F5/08 ,  F16H55/17 ,  B22F2998/10 ,  F16H2055/065

摘要： A gear from a sintering powder has a first track and a second track, wherein the first track is a first cylindrical gear toothing with first teeth and with a first diameter and the second track is a second cylindrical gear toothing with second teeth and with a second, in comparison to the first diameter of the first track larger, diameter, and wherein depressions are configured on the first teeth of the first track in a transition region adjoining the second track.

公开(公告)号：US20240149339A1

公开(公告)日：2024-05-09

申请号：US18280980

申请日：2022-03-07

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Shinya HIBINO ,  Ryutaro OKADA ,  Yoshimichi NOMURA ,  Kazushige FUJIMITSU

IPC分类号： B22F7/06 ,  B22F3/10 ,  B22F3/16 ,  B22F3/22 ,  B22F7/00 ,  B23K1/00 ,  B23K1/19 ,  B23K35/30 ,  B32B15/01 ,  C22C19/05

CPC分类号： B22F7/06 ,  B22F3/10 ,  B22F3/16 ,  B22F3/225 ,  B22F7/008 ,  B23K1/0008 ,  B23K1/19 ,  B23K35/304 ,  B32B15/01 ,  C22C19/055 ,  B22F2301/15 ,  B22F2998/10 ,  B22F2999/00

摘要： A first pre-sintered body composed of a powder made of a first Ni-based alloy is prepared, and a second pre-sintered body composed of a powder made of a second Ni-based alloy is prepared. Subsequently, the first and second pre-sintered bodies are positioned to face each other across a predetermined gap, and a joining material made of a Ni-based alloy having a lower liquidus temperature than the first and second Ni-based alloys is placed in a space that adjoins the first and second pre-sintered bodies and to which the gap opens. After the placing of the joining material, the first and second pre-sintered bodies are heated to melt the joining material, fill the gap with the molten joining material, and subsequently turn the first and second pre-sintered bodies into first and second sintered bodies, respectively.