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1.发明公开
公开(公告)号：EP3967407A1
公开(公告)日：2022-03-16
申请号：EP21193700.8
申请日：2021-08-30
发明人： Wang, Chuanshen , Yang, Kunkun , Peng, Zhongjie , Jia, Daoning , Ding, Kaihong
IPC分类号： B05B1/04 , B05B14/30 , B05D1/02 , B05D3/00 , B05D3/02 , C09D5/08 , C23C18/04 , C23C18/12 , H01F41/02 , H01F1/057
摘要： The invention relates to a preparation device and method of forming a ceramic coating on a sintered type NdFeB permanent magnet (8). The preparation device comprises a holding barrel (1), a pump body (2), a spraying system, and a fixture mechanism. The pump body (2) is connected with the holding barrel (1) and the spraying system, and the spraying system is located above the fixture mechanism and there is a distance between the spraying system and the fixture mechanism. The fixture mechanism is connected with a recovery bucket (7) through a pipeline (6), and the recovery bucket (7) is connected with the holding barrel (1) through a pipeline. The spraying system comprises a nozzle (5), wherein the inlet of the nozzle (5) is connected with a pipeline (3) of the pump body (2). The fixture mechanism comprises a support plate (11), an upper recovery trough plate (9) and a lower recovery trough plate (10), wherein the lower recovery trough plate (10) is located above the support plate (11). The lower recovery trough plate (10) is symmetrically arranged on both ends of the upper recovery trough plate (9). The outlet of the nozzle (5) is located above a containment space of the spraying system.
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公开(公告)号：EP3845335A1
公开(公告)日：2021-07-07
申请号：EP20212797.3
申请日：2020-12-09
发明人： Chen, Xiulei , Peng, Zhongjie , Zhu, Xiaonan , Ding, Kaihong
摘要： The present invention refers to a method of preparing a NdFeB magnet powder. The method includes a hydrogen treatment process including the steps of:
a) charging NdFeB alloy flakes into a hydrogen treatment furnace, wherein the NdFeB alloy flakes include a neodymium-rich phase and a main phase;
b) performing a hydrogen absorption by heating the hydrogen treatment furnace in a first stage to a temperature at which only the neodymium-rich phase undergoes a hydrogen absorption reaction, then introducing and maintaining hydrogen at a predetermined pressure until the hydrogen absorption of the neodymium-rich phase is finished, then stop heating of the hydrogen treatment furnace in a second stage, where the temperature falls to a temperature at which the main phase undergoes a hydrogen absorption reaction; and
c) when the hydrogen absorption of step b) is finished, performing a vacuum dehydrogenation of the obtained coarse magnet powder.-
公开(公告)号：EP3819043A1
公开(公告)日：2021-05-12
申请号：EP20205474.8
申请日：2020-11-03
发明人： Chen, Xiulei , Peng, Zhongjie , Zhu, Xiaonan , Xiang, Chunjie , Ding, Kaihong
IPC分类号： B22F1/00 , B22F3/04 , B22F3/10 , B22F9/04 , C22C38/00 , H01F1/057 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , B22F9/02
摘要： The present invention relates generally to a method for improving the performance of sintered NdFeB magnet. A method of preparing a sintered NdFeB magnet therefore comprises the steps of:
a) preparing alloy flakes from a raw material of the NdFeB magnet by a strip casting process; and
b) preparing a coarse alloy powder from the alloy flakes by a hydrogen decrepitation process, the hydrogen decrepitation process including treatment of the alloy flakes under a hydrogen pressure of 0.10 MPa to 0.25 MPa for a duration of 1 to 3.5 hours, then degassing the hydrogen at a predetermined temperature between 300°C to 400°C for a duration time of 0.5 to 5 hours, and then mixing the resulting coarse alloy powder with a lubricant.-
公开(公告)号：EP3591676A1
公开(公告)日：2020-01-08
申请号：EP19183244.3
申请日：2019-06-28
发明人： YANG, Kunkun , PENG, Zhongjie , WANG, Chuanshen
IPC分类号： H01F41/02
摘要： The invention discloses a gradient NdFeB magnet and a production method, It is characterized by providing a gradient changing magnet by covering and diffusing heavy rare earth elements in the partial area of NdFeB magnet, According to coercive force of the gradient NdFeB magnet, it can be divided into 3 different regions along the direction which perpendicular to the direction of magnetization, the coercivity is high near the edge and low near the center: The gradient NdFeB magnet of the present invention has a high coercive force only in the easy demagnetization region of the edge of the magnet, and does not undergo diffusion treatment in the remaining portion, and the heavy rare earth material is used less.
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5.发明授权Manufacturing method of R-T-B-M-C sintered magnet 有权Herstellungsverfahren von R-T-B-M-C-gesinterten Magneten
公开(公告)号：EP2760032B1
公开(公告)日：2016-06-08
申请号：EP14153114.5
申请日：2014-01-29
发明人： Peng, Zhongjie , Liu, Xiaotong , Cui, Shengli , Ding, Kaihong
CPC分类号： H01F41/0266 , B22F3/02 , B22F2003/023 , B22F2998/10 , B22F2999/00 , C22C33/0278 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/10 , C22C38/16 , C22C2202/02 , H01F1/0577 , H01F1/058 , H01F7/02 , H01F41/0273 , B22F2304/10 , B22F2202/05 , B22F3/10 , B22F2003/248
摘要： The present invention refers to a method of manufacturing an R-T-B-M-C sintered rare earth magnet comprising the process steps of: a) charging an R-T-B-M-C alloy powder including a lubricant into a mold cavity with a predetermined density, wherein R is at least one rare earth element including Y and Sc, T is iron or a mixture of iron and cobalt, and M is at least one element selected from Ti, Ni, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Cu, Ga, Mo, W and Ta, and the weight contents of these components are in the ranges 25 % ‰¤ R ‰¤ 40 %, 60 % ‰¤ T ‰¤ 74 %, 0 % ‰¤ M ‰¤ 2 %, 0.8 % ‰¤ B ‰¤ 1.2 %, 0.03 % ‰¤ C ‰¤ 0.15 %; b) applying a magnetic field to the powder filled in the mold cavity under a pressure in the range of 0.2 to 2 MPa; and c) sintering the same under inert gas followed by an additional heat treatment.
摘要翻译： 本发明涉及一种制造RTBMC烧结稀土磁体的方法，包括以下步骤：a）将具有预定密度的包含润滑剂的RTBMC合金粉末装入模腔中，其中R是至少一种稀土元素，包括 Y和Sc，T为铁或铁和钴的混合物，M为选自Ti，Ni，Nb，Al，V，Mn，Sn，Ca，Mg，Pb，Sb，Zn，Si， Zr，Cr，Cu，Ga，Mo，W和Ta，这些组分的重量含量在25％‰¤R‰40％，60％‰¤‰‰74％，0％‰¤M ‰¤2％，0.8％‰¤B‰¤1.2％，0.03％‰¤‰¤0.15％; b）在0.2-2MPa的压力下对填充在模腔中的粉末施加磁场; 和c）在惰性气体下烧结，然后进行额外的热处理。
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公开(公告)号：EP3970881A1
公开(公告)日：2022-03-23
申请号：EP21194585.2
申请日：2021-09-02
发明人： Zhai, Yulong , Lyu, Sijing , Zhao, Dajun , Zhai, Xiaochen , Ding, Kaihong
摘要： The present invention refers to a device and a method for the addition of liquid additives in the form of a spray during a jet milling step in a process for the manufacture of sintered NdFeB alloy magnets. The device comprises: a storage barrel for the liquid additive; a weighing bucket which is in fluid communication with the storage barrel and is adapted for weighing a predetermined amount of the liquid additive; a powder container to accommodate NdFeB alloy material prior to or after jet milling, wherein the powder container includes an opening that is plugged with a blind flange; a connecting pipe, which is in fluid communication with the weighing bucket and passes through an opening of the blind flange into the interior of the powder container; and a fluid atomization nozzle located at the end of the connection pipe.
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公开(公告)号：EP3955268A1
公开(公告)日：2022-02-16
申请号：EP21189825.9
申请日：2021-08-05
发明人： Yang, Kunkun , Peng, Zhongjie , Ding, Kaihong
IPC分类号： H01F1/057
摘要： The invention provides a novel NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets. The NdFeB alloy powder includes NdFeB alloy core particles with a mixed metal coating. The mixed metal coating is formed by simultaneously vapor deposition of
a) at least one high-melting metal M selected from the group consisting of Mo, W, Zr, Ti, and Nb; and
b) at least one metal R, where R is selected from the group consisting of Pr, Nd, La, and Ce; or
a metal alloy RX, where X is one selected from the group consisting of Cu, Al, and Ga and R is at least one selected from the group consisting of Pr, Nd, La, and Ce.-
公开(公告)号：EP3828903A1
公开(公告)日：2021-06-02
申请号：EP20206111.5
申请日：2020-11-06
发明人： Wang, Chuanshen , Yang, Kunkun , Peng, Zhongjie , Jia, Daoning , Ding, Kaihong
IPC分类号： H01F41/02
摘要： The present invention provides a method for increasing the coercivity of a sintered type NdFeB permanent magnet. The method comprises the following steps:
a) coating of a slurry on a surface of the sintered type NdFeB permanent magnet, the slurry comprising
- first particles consisting of a heavy rare earth alloy or a heavy rare earth or a non-metallic compound, the first particles having an average particle diameter of 0.5µm to 75µm, and
- second particles consisting of a metal alloy or a metal, the second particles having an average particle diameter of 0.5µm to 150µm,
wherein at least one of the first particles and second particles includes at least one of Dy and Tb and wherein a ratio of the average particle diameter of the second particles to the average particle diameter of the first particles is in the range of 2:1 to 20:1;
b) performing a vibration of the coated magnet in vertical direction of the applied slurry with a vibration frequency of in the range of 10Hz to 50Hz for a duration of 30s to 5 min, then drying the slurry; and
c) performing a thermally induced grain boundary diffusion process.-
公开(公告)号：EP3599625A1
公开(公告)日：2020-01-29
申请号：EP19187271.2
申请日：2019-07-19
发明人： WANG, Chuanshen , PENG, Zhongjie , YANG, Kunkun
IPC分类号： H01F41/02
摘要： The invention relates to a method of increasing the coercivity of a sintered type NdFeB permanent magnet. The method comprises preparation of a diffusion source for a heavy rare earth element by adsorption of a heavy rare earth powder on at least one side of an adhesive organic film. The heavy rare earth diffusion source is applied on the surface of the sintered type NdFeB permanent magnet. Furthermore, in order to diffuse the element of heavy rare earth into the sintered type NdFeB permanent magnet along a grain boundary, a diffusion and aging treatment is performed. The method enhances coercivity while hardly reducing the remanence.
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公开(公告)号：EP3514813A1
公开(公告)日：2019-07-24
申请号：EP18212615.1
申请日：2018-12-14
发明人： Peng, Zhongjie , Liu, Xiaotong
IPC分类号： H01F41/02
摘要： The present invention provides a method for preparing R-T-B sintered magnets. The method comprises the steps of:
Introducing a carrier gas, a reactive gas, and a cooling gas into a plasma torch gun (1) and passing a Dy and/or Tb powder driven by the carrier gas through the plasma torch gun (1) thereby heating and melting the Dy and/or Tb powder under the action of high temperature of the plasma torch to generate spherical droplets which are deposited as a metal film on a surface of an R-T-B-M sintered basal diffusion magnet of R 2 T 14 B type, wherein R is at least one element selected from the rare earth elements including Sc and Y, T is at least one element selected from Fe and Co, B is boron, and M is at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Mn, Ni, Cu, Ag, Zn, Zr, Al, Ga, In, C, Si, Ge, Sn, Pb, N, P, Bi, S, Sb, and O, and wherein a weight percentage of said elements is: 25% ≤ R ≤ 40%, 0 ≤ M ≤ 4%, 0.8% ≤ B ≤ 1.5%, and the residue is T.
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