BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Wang, Haojie
Fang, Bin
Du, Fei
Wang, Zhan
Zhao, Yugang
Abrégé
A NdFeB rare earth magnet includes a main phase and a grain boundary phase including a white grain boundary phase and a gray grain boundary phase. In a microstructure observation area of the rare earth magnet, an area of the white grain accounts for 1˜3% of a total area of the microstructure observation area, and an area of the gray grain boundary phase accounts for 2˜10% of the total area of the microstructure observation area.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
C22C 33/02 - Fabrication des alliages ferreux par des techniques de la métallurgie des poudres
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/10 - Alliages ferreux, p. ex. aciers alliés contenant du cobalt
C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Fang, Bin
Wang, Haojie
Zhao, Yugang
Abrégé
A composite coating layer for coating a NdFeB rare earth magnet includes a first coating layer and a second coating layer formed over a surface of the first coating layer. The first coating layer includes a Nd coating layer, a Pr coating layer, or an alloy coating layer including two or more of Nd, Pr, and Cu. The second coating layer includes a Tb coating layer.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
3.
RARE-EARTH MAGNET, MAGNET HAVING SPUTTERED RARE EARTH, AND MAGNET HAVING DIFFUSED RARE EARTH, AND PREPARATION METHOD
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Wang, Haojie
Fang, Bin
Du, Fei
Wang, Zhan
Zhao, Yugang
Abrégé
A rare-earth magnet, a magnet having sputtered rare earth, a magnet having diffused rare earth, a preparation method, and a rare-earth permanent magnet motor. The method for preparing a rare-earth magnet comprises the following steps: mixing main alloyed powder and auxiliary alloyed powder according to the mass ratio of 95 to 99 : 1 to 5 so as to acquire mixed magnetic powder, the mass ratios of elements of the main alloy being R28 : 32M0.1 : 1.4Ga0.3 : 0.8B0.97 : 1.0(DyTb)0 : 2Tbal, the mass ratios of elements of the auxiliary alloy being R31 : 35M0 : 1.4Ga0.5 : 0.8B0.82 : 0.92(DyTb)0 : 2Tbal, R being a rare-earth element free of Dy and Tb, the proportion of Pr and/or Nd in R being 98 to 100 wt%, M being at least one of Al, Cu, Nb, Zr, and Sn, and T being Fe and/or Co and inevitable impurities; performing orientation suppression on the mixed magnetic powder in a magnetic field so as to form a pressed shape; placing the pressed shape in a vacuum sintering furnace to perform sintering so as to acquire a sintered magnet; and performing tempering on the sintered magnet so as to acquire a rare-earth magnet.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
H02K 1/02 - Détails du circuit magnétique caractérisés par le matériau magnétique
H02K 1/06 - Détails du circuit magnétique caractérisés par la configuration, la forme ou le genre de structure
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Fang, Bin
Wang, Haojie
Zhao, Yugang
Abrégé
A coating device and a coating method. The coating device comprises a coating chamber (11), a target material being mounted on the top part of the coating chamber (11), the target material comprising a first target material (21) and a second target material (22); the first target material (21) is Nd target material or Pr target material, or an alloy target material of at least two or more of Nd, Pr, and Cu; the second target material (22) is Tb target material; and the first target material (21) is positioned in front of the second target material (22). The present coating device and coating method improve the usage efficiency of heavy rare earth metals.
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Fang, Bin
Sun, Libai
Zhao, Yugang
Abrégé
The current invention discloses a type of micronized powder for manufacturing sintered Neodymium magnetic material, a target type jet mill pulverization method to prepare the micronized powder, and the resulting pulverized powder. The Neodymium magnet powder created under the method is of sphericity of greater than or equal to 90% and of particle adhesion rate of less than or equal to 10%. A is the diameter of the target center, B is the diameter of the side nozzle, and C is the distance between the target center and the nozzle. The relationship amongst A, B and C is A/B=m×(C/A+B), where m ranges from 1 to 7. A velocity of the jet stream from side nozzle is between about 320 m/s to about 580 m/s.
B22F 9/04 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau solide, p. ex. par broyage, meulage ou écrasement à la meule
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
B22F 1/00 - Poudres métalliquesTraitement des poudres métalliques, p. ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B02C 19/06 - Appareils utilisant un courant de fluides
B02C 23/10 - Séparation ou triage de matériaux, associé au broyage ou à la désagrégation au moyen d'un séparateur situé dans le passage de décharge de la zone de broyage ou de désagrégation
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Fang, Bin
Sun, Libai
Zhao, Yugang
Abrégé
Micro powder for preparing a neodymium-iron-boron permanent magnet material, a method for preparing powder by means of target-type jet milling, and jet-milled powder. The sphericity of the micro powder is larger than or equal to 90%, and the particle powder adhesion is smaller than or equal to 10%. In the method for preparing powder by means of target-type jet milling, the relationship among the diameter A of a target, the diameter B of a side nozzle, and the distance C between the target and the side nozzle is: A/B = m×(C/A+B), wherein the value range of m is 1-7, and the airflow jet velocity of the side nozzle is 320-580 m/s. The relationship between the diameter F of a classifying wheel and the diameter A of the target is: F = p×A, wherein the value range of p is 3-6. The jet-milled powder obtained by the method above consists of ultra-fine powder and the micro powder. The ratio of the mass of the ultra-fine powder to the total mass of the jet-milled powder is smaller than or equal to 0.5%. The particle size of the micro powder is uniform in distribution and small in range; the micro powder has low nitrogen content and is applicable to mass production of high-quality sintered neodymium-iron-boron permanent magnet material. Moreover, the powder obtained by the target-type jet milling method contains no unmilled material, and thus saves a follow-up process.
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
SANVAC (BEIJING) MAGNETICS CO., LTD. (Chine)
Inventeur(s)
Zhao, Yugang
Hu, Boping
Zhang, Jin
Chen, Guo'An
Rao, Xiaolei
Niu, E
Chen, Zhi'An
Jia, Jingdong
Jin, Guoshun
Abrégé
Provided is a method for preparing a rare earth permanent magnet, which comprises a blank magnet preparing procedure not comprising a tempering treatment step, a permeating material coating procedure and a heat treatment procedure. The blank magnet preparing procedure not comprising a tempering treatment step refers to performing procedures of compounding-alloy smelting-powder production through pulverization-forming-sintering to manufacture a blank magnet. The permeating material coating procedure comprises procedures of preparing a permeating material powder, preparing the permeating material powder as a coating solution, coating the blank magnet in the coating solution etc. In the present invention, a rare earth intermetallic compound is used as a diffusion material, and the rare earth intermetallic compound has more stable phases and components and is easily pulverizable; and the rare earth intermetallic compound has a wide phasing element range, and the composition of the rare earth intermetallic compound can be adjusted and formed according to requirements of the magnet performance. The present invention can improve boundary characteristics of crystal boundaries and the interaction thereof with main phase grains, and improves the intrinsic coercive field of a sintered neodymium-iron-boron magnet, while the remanence and maximum magnetic energy product are reduced less in quantity.
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
H01F 1/053 - Alliages caractérisés par leur composition contenant des métaux des terres rares
8.
Nd—Fe—B sintered magnet and methods for manufacturing the same
Beijing Zhong Ke San Huan Hi-Tech Co., LTD. (Chine)
Sanvac (Beijing) Magnetics Co., LTD. (Chine)
Inventeur(s)
Hu, Boping
Zhao, Yugang
Zhang, Jin
Chen, Guoan
Rao, Xiaolei
Niu, E
Chen, Zhian
Jin, Guoshun
Jia, Jingdong
Abrégé
A sintered neodymium-iron-boron magnet, the main components thereof comprising rare-earth elements R, additional elements T, iron Fe and boron B, and having a rare-earth-enriched phase and a main phase of a Nd2Fe14B crystal structure. The sum of the numerical values of the maximum magnetic energy product (BH)max in units of MGOe and the intrinsic coercive force Hcj in units of kOe is not less than 70. The manufacturing method of the sintered neodymium-iron-boron magnet comprises alloy smelting, powder making, powder mixing, press forming, sintering and heat treatment procedures. By controlling the component formulation and optimizing the process conditions, the sintered neodymium-iron-boron magnet is enabled to simultaneously have a high maximum magnetic energy product and a high intrinsic coercive force.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 1/053 - Alliages caractérisés par leur composition contenant des métaux des terres rares
C22C 33/02 - Fabrication des alliages ferreux par des techniques de la métallurgie des poudres
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/10 - Alliages ferreux, p. ex. aciers alliés contenant du cobalt
C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre
9.
MIXED RARE EARTH SINTERED PERMANENT MAGNET AND PREPARATION METHOD THEREOF
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
SANVAC(BEIJING)MAGNETICS CO., LTD. (Chine)
Inventeur(s)
Hu, Boping
Zhao, Yugang
Chen, Guoan
Niu, E
Rao, Xiaolei
Zhang, Jin
Chen, Zhian
Abrégé
The present invention provides a mixed rare earth sintered permanent magnet and preparation method thereof. The preparation method of the mixed rare earth sintered permanent magnet prepares the sintered permanent magnet by more than two kinds of alloys. The preparation method of the mixed rare earth sintered permanent magnet of the present invention may produce a sintered magnet with a magnetic energy product such as 2-45 MGOe and optional performance by adjusting proportions of each alloy according to need. A stable main phase of R2Fe14B can be formed by multi-alloy process. Because the permanent magnet is prepared directly by the mixed rare earth, steps of extraction, separation and purification for preparing a single rare earth can be partly saved on one hand, the cost is greatly saved and the environment is protected; the comprehensive utilization of the rare earth resource can be maximized on the other hand.
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
SANVAC (BEIJING) MAGNETICS CO., LTD. (Chine)
Inventeur(s)
Chen, Guoan
Zhao, Yugang
Hu, Boping
Rao, Xiaolei
Zhang, Jin
Niu, E
Chen, Zhian
Abrégé
The present invention provides a powder composition and a method for preparing an R-Fe-B-series sintered magnet. The powder composition consists of a component (A), a component (B), and a component (C). The component (A) is selected from one or more of fluoride powder, oxide powder, and oxyfluoride powder of heavy rare earth. The component (B) is rare earth-transition intermetallic compound powder having a MgCu2 crystal structure. The component (C) is selected from one or more of rare earth hydrated nitrate powder. The method for preparing an R-Fe-B-series sintered magnet provided by the present invention comprises: coating a conditioning fluid containing the powder composition on the magnet, which has the technical effect of using a tiny amount of heavy rare earth dysprosium (Dy) or terbium (Tb) to significantly improve the coercivity of the magnet under the premise of basically keeping remanence and a maximum magnetic energy product of the R-Fe-B-series sintered magnet.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 1/06 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques durs métaux ou alliages sous forme de particules, p. ex. de poudre
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
SANVAC (BEIJING) MAGNETICS CO., LTD. (Chine)
Inventeur(s)
Zhao, Yugang
Hu, Boping
Chen, Guoan
Rao, Xiaolei
Zhang, Jin
Niu, E
Chen, Zhian
Jiang, Bing
Jiang, Hao
Abrégé
A surface treatment method and a preparation method of a sintered NdFeB magnet. The surface treatment method comprising: dipping, coating or spraying a solution containing at least one of Dy and Tb onto the surface of the sintered NdFeB magnet, diffusion processing the sintered NdFeB magnet in a non-oxidizing environment. The intrinsic coercive force can be improved while the maximum energy product of the sintered NdFeB magnet is held on the basis of the surface treatment method and the preparation method.
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 1/08 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques caractérisés par leur coercivité en matériaux magnétiques durs métaux ou alliages sous forme de particules, p. ex. de poudre comprimées, frittées ou agglomérées
BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD. (Chine)
SANVAC (BEIJING) MAGNETICS CO., LTD. (Chine)
Inventeur(s)
Hu, Boping
Zhao, Yugang
Zhang, Jin
Chen, Guoan
Rao, Xiaolei
Niu, E
Chen, Zhian
Jin, Guoshun
Jia, Jingdong
Abrégé
A sintered neodymium-iron-boron magnet, the main components thereof comprising rare-earth elements R, additional elements T, iron Fe and boron B, and having a rare-earth-enriched phase and a main phase of a Nd2Fe14B crystal structure. The sum of the numerical values of the maximum magnetic energy product (BH)max in units of MGOe and the intrinsic coercive force Hcj in units of kOe is not less than 70. The manufacturing method of the sintered neodymium-iron-boron magnet comprises alloy smelting, powder making, powder mixing, press forming, sintering and heat treatment procedures. By controlling the component formulation and optimizing the process conditions, the sintered neodymium-iron-boron magnet is enabled to simultaneously have a high maximum magnetic energy product and a high intrinsic coercive force.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants
BEIJING ZHONG KE SAN HUAN HIGH-TECH CO., LTD. (Chine)
Inventeur(s)
Zhao, Yugang
Zhang, Jin
Sun, Libo
Hu, Boping
Jia, Jingdong
Yang, Yan
Abrégé
A holmium-containing sintered NdFeB rare earth permanent magnetic material and its manufacturing method are provided. The permanent magnet material has the following composition: LnαHoβBγMxNyFe100-α-β-γ-x-y, wherein: Ln is rare earth element, including Nd and at least one element selected from Pr, Dy, Tb; M is additive element, including Co and Cu; N is also additive element, including at least one element from Al, Ga, Nb, Zr, Ti and Sn; α, β, γ, x and y represent the percentage of weight for each element content; Fe indicates Fe element and unavoidable impurities of which; wherein 29≤α≤33, 0.5≤β≤4, 0.95≤γ≤1.20, 0≤x≤3.5, 0≤y ≤1.50. The coercive force Hcj of the magnetic material is evidently increased after having additive Ho.
H01F 1/057 - Alliages caractérisés par leur composition contenant des métaux des terres rares et des métaux de transition magnétiques, p. ex. SmCo5 et des éléments IIIa, p. ex. Nd2Fe14B
H01F 41/02 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants