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公开(公告)号：US20160293329A1
公开(公告)日：2016-10-06
申请号：US15168555
申请日：2016-05-31
发明人： Masato SAGAWA , Osamu ITATANI , Norio YOSHIKAWA
CPC分类号： H01F41/0273 , B22F3/004 , B30B15/302 , B65B1/04 , B65B1/16 , B65B7/28 , H01F41/0266
摘要： A powder-filling system capable of filling a container with powder at an approximately uniform filling density has: a hopper having an opening removably and hermetically closably attached to the container, the hopper communicating with the container at the opening for supplying powder to a container; a powder supplier for supplying powder to the hopper; a gas supplier for repeatedly supplying compressed gas in a pulsed form to the hopper, with the hopper hermetically closably attached to the container; and a sieve member provided at the opening and having a smaller openings in a region near a side wall of the hopper than in its central region. The smaller openings in the region near the side wall of the hopper where the powder more easily falls from the hopper into the container impedes the fall of the powder in that region and improves the overall uniformity in the filling density.
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公开(公告)号：US09449758B1
公开(公告)日：2016-09-20
申请号：US15168555
申请日：2016-05-31
发明人： Masato Sagawa , Osamu Itatani , Norio Yoshikawa
CPC分类号： H01F41/0273 , B22F3/004 , B30B15/302 , B65B1/04 , B65B1/16 , B65B7/28 , H01F41/0266
摘要： A powder-filling system capable of filling a container with powder at an approximately uniform filling density has: a hopper having an opening removably and hermetically closably attached to the container, the hopper communicating with the container at the opening for supplying powder to a container; a powder supplier for supplying powder to the hopper; a gas supplier for repeatedly supplying compressed gas in a pulsed form to the hopper, with the hopper hermetically closably attached to the container; and a sieve member provided at the opening and having a smaller openings in a region near a side wall of the hopper than in its central region. The smaller openings in the region near the side wall of the hopper where the powder more easily falls from the hopper into the container impedes the fall of the powder in that region and improves the overall uniformity in the filling density.
摘要翻译： 能够以大致均匀的填充密度填充粉末的容器的粉末填充系统具有：具有可拆卸地且气密地连接到容器的开口的料斗，料斗在开口处与容器连通以将粉末供应到容器; 用于向料斗供应粉末的粉末供应商; 用于将脉冲形式的压缩气体重复供应到料斗的气体供应器，料斗气密地附接到容器; 以及设置在所述开口处并且在所述料斗的侧壁附近的区域中比在其中心区域具有较小开口的筛子构件。 在料斗的侧壁附近的较小的开口，其中粉末更容易从料斗落入容器中，阻碍了该区域中的粉末的下降，并且提高了填充密度的整体均匀性。
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公开(公告)号：US09028624B2
公开(公告)日：2015-05-12
申请号：US14113961
申请日：2012-12-27
发明人： Masato Sagawa , Tetsuhiko Mizoguchi
CPC分类号： H01F7/02 , B22F1/0011 , B22F9/023 , C22C33/02 , H01F1/0557 , H01F1/057 , H01F1/0577 , H01F41/0266 , H01F41/0293
摘要： Provided is a NdFeB sintered magnet which can be used in the grain boundary diffusion method as a base material in which RH can be easily diffused through the rare-earth rich phase and which itself has a high coercive force, a high maximum energy product and a high squareness ratio, as well as a method for producing such a magnet. A NdFeB system sintered has an average grain size of the main-phase grains magnet is equal to or smaller than 4.5 μm, the carbon content of the entire NdFeB system sintered magnet is equal to or lower than 1000 ppm, and the percentage of the total volume of a carbon rich phase in a rare-earth rich phase at a grain-boundary triple point in the NdFeB system sintered magnet to the total volume of the rare-earth rich phase is equal to or lower than 50%.
摘要翻译： 本发明提供一种NdFeB烧结磁体，其可以用作晶界扩散法中的基底材料，其中RH容易通过富稀土相扩散，本身具有高的矫顽力，高的最大能量积和 高矩形比，以及这种磁体的制造方法。 NdFeB系烧结后的主晶粒磁铁的平均粒径为4.5μm以下，NdFeB系烧结磁铁整体的碳含量为1000ppm以下， 在NdFeB系烧结磁体中的晶界三重点处的富稀相中的富碳相的体积相对于富稀土相的总体积为50％以下。
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公开(公告)号：US08420160B2
公开(公告)日：2013-04-16
申请号：US12441124
申请日：2007-07-23
申请人： Masato Sagawa
发明人： Masato Sagawa
CPC分类号： H01F41/005 , B22F3/1039 , B22F7/06 , B22F2003/248 , B22F2999/00 , C22C38/005 , C22C38/06 , C22C38/08 , C22C38/10 , H01F1/0577 , H01F41/0293 , B22F2202/01 , B22F2201/20
摘要： The present invention provides a method for producing a sintered NdFeB magnet having high coercivity and capable of being brought into applications without lowering its residual magnetic flux density or maximum energy product and without reprocessing. The method for producing a sintered NdFeB magnet according to the present invention includes applying a substance containing dysprosium (Dy) and/or terbium (Tb) to the surface of the sintered NdFeB magnet forming a base body and then heating the magnet to diffuse Dy and/or Tb through the grain boundary and thereby increase the coercivity of the magnet. This method is characterized in that: (1) the substance containing Dy or Tb to be applied to the surface of the sintered NdFeB magnet is substantially a metal powder; (2) the metal powder is composed of a rare-earth element R and an iron-group transition element T, or composed of R, T and another element X, the element X capable of forming an alloy or intermetallic compound with R and/or T; and (3) the oxygen content of the sintered NdFeB magnet forming the base body is 5000 ppm or lower. The element T may contain nickel (Ni) or cobalt (Co) to produce an anticorrosion effect.
摘要翻译： 本发明提供一种制造具有高矫顽力的NdFeB烧结磁体的方法，能够在不降低其剩余磁通密度或最大能量产物的情况下进行应用，而不需要后处理。 根据本发明的NdFeB烧结磁体的制造方法包括将镝（Dy）和/或铽（Tb）的物质施加到形成基体的NdFeB烧结磁体的表面，然后加热磁体以扩散Dy和 /或Tb，从而提高磁体的矫顽力。 该方法的特征在于：（1）应用于烧结NdFeB磁体表面的含有Dy或Tb的物质基本上是金属粉末; （2）金属粉末由稀土元素R和铁基过渡元素T构成，或由R，T和另一元素X构成，能够与R和/ 或T; 和（3）形成基体的烧结NdFeB磁体的氧含量为5000ppm以下。 元素T可以含有镍（Ni）或钴（Co）以产生抗腐蚀效果。
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公开(公告)号：US20100282371A1
公开(公告)日：2010-11-11
申请号：US12812379
申请日：2009-01-09
申请人： Masato Sagawa , Naoki Fujimoto
发明人： Masato Sagawa , Naoki Fujimoto
CPC分类号： H01F41/005 , H01F1/0557 , H01F1/057 , H01F41/0293
摘要： The present invention is aimed at providing a method for producing an NdFeB sintered magnet having a higher coercivity and higher squareness of the magnetization curve than ever before. A method for producing an NdFeB sintered magnet according to the present invention includes the steps of forming a layer containing Dy and/or Tb on the surface of an NdFeB sintered magnet base material and then performing a grain boundary diffusion process for diffusing Dy and/or Tb from the aforementioned layer through the crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than the sintering temperature thereof, and this method is characterized in that a) the content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %; b) the aforementioned layer is a powder layer formed by depositing a powder; and c) the powder layer contains Dy and/or Tb in a metallic state by an amount equal to or higher than 50 mass %.
摘要翻译： 本发明旨在提供一种制造具有比以前更高的矫顽力和较高的磁化曲线矩形度的NdFeB烧结磁体的方法。 根据本发明的NdFeB烧结磁体的制造方法包括以下步骤：在NdFeB烧结磁体基材的表面上形成含有Dy和/或Tb的层，然后进行扩散Dy和/或 Tb通过将磁体基材加热到等于或低于其烧结温度的温度，通过磁体基材的晶界进入磁体基材，该方法的特征在于a）含量 在磁体基材中处于金属状态的稀土的含量等于或高于12.7at％; b）上述层是通过沉积粉末形成的粉末层; 和c）粉末层含有金属状态的Dy和/或Tb等于或高于50质量％的量。
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公开(公告)号：US5672363A
公开(公告)日：1997-09-30
申请号：US461614
申请日：1995-06-05
申请人： Masato Sagawa , Hiroshi Nagata , Hiroo Shirai
发明人： Masato Sagawa , Hiroshi Nagata , Hiroo Shirai
CPC分类号： B22F3/225 , B22F3/003 , B30B11/005 , B30B11/008 , B30B11/02 , B30B11/022 , B30B11/027 , B30B15/024 , B30B15/302 , H01F41/0266 , B22F2003/026 , B22F2998/00 , B22F2999/00 , B29C2043/046 , B29C2043/3652 , B29C2043/3689 , B29C43/36 , B29K2303/06 , Y10S425/044
摘要： An apparatus for producing a green compact includes a circuit that circulates die assemblies, each of which contains a rubber mold having rubber in at least its side portion. The apparatus also includes a high density filling device that has a feeder for feeding powder into the rubber molds; a pusher or a vibrator or both a vibrator and a pusher; a die press machine configured to impart a compaction force sufficient to produce the green compact to each of the circulating die assemblies in succession; and a device for removing the green compact from each rubber mold. The high-density filling device, the die-press machine and the removing device are successively arranged along the circuit. Each of the circulating die assemblies has sufficient structural integrity to withstand the compaction force because all structure necessary to withstand the compaction force is present in the circulating die assemblies.
摘要翻译： 一种用于制造生坯的设备包括使模具组件循环的电路，每个模具组件至少在其侧部包含具有橡胶的橡胶模具。 该装置还包括高密度填充装置，其具有用于将粉末供入到橡胶模具中的进料器; 推动器或振动器，或振动器和推动器两者; 一种模压机，其被配置成赋予足够的压实力以连续地向每个循环模具组件生产生坯; 以及用于从每个橡胶模具去除生坯的装置。 高密度填充装置，冲压机和去除装置沿着电路连续布置。 每个循环模具组件具有足够的结构完整性以承受压实力，因为在循环模具组件中存在承受压实力所需的所有结构。
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公开(公告)号：US5505990A
公开(公告)日：1996-04-09
申请号：US264753
申请日：1994-06-23
申请人： Masato Sagawa , Hiroshi Watanabe , Hiroshi Nagata
发明人： Masato Sagawa , Hiroshi Watanabe , Hiroshi Nagata
CPC分类号： B05D3/12 , B05D1/00 , C23C24/045 , B05D2258/00 , B05D2401/32 , B05D3/0254
摘要： A method for forming a coating on at least one part to be coated has the steps of agitating a mixture including (i) the at least one part to be coated, (ii) a material that forms an adhesive layer on the at least one part to be coated, (iii) impact media, and (iv) multiple compositions of powder material; and fusing at least one of the multiple compositions of powder material.
摘要翻译： 一种在待涂覆的至少一个部分上形成涂层的方法包括以下步骤：搅拌混合物，所述混合物包括（i）待涂覆的至少一个部分，（ii）在至少一个部分上形成粘合剂层的材料 （iii）冲击介质，和（iv）多种组合物的粉末材料; 并且融合所述多种粉末材料组合物中的至少一种。
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公开(公告)号：US10468166B2
公开(公告)日：2019-11-05
申请号：US14114657
申请日：2012-12-27
发明人： Masato Sagawa , Tetsuhiko Mizoguchi
IPC分类号： H01F1/057
摘要： A NdFeB system sintered magnet produced by the grain boundary diffusion method that has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. The NdFeB system sintered magnet has a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called RH) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the difference Cs-Cd3 between the RH content Cs (wt %) in the grain boundary reaching the surface to which RH is attached and the RH content Cd3 (wt %) in the grain boundary at a depth of 3 mm from the aforementioned attachment surface is equal to or smaller than 20 wt %.
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公开(公告)号：US20170278604A1
公开(公告)日：2017-09-28
申请号：US15503814
申请日：2015-08-18
发明人： Yasuhiro UNE , Hirokazu KUBO , Masato SAGAWA , Satoshi SUGIMOTO , Masashi MATSUURA , Michihide NAKAMURA
IPC分类号： H01F1/057 , C22C38/10 , C22C38/06 , H02K1/02 , B22F3/16 , B22F9/02 , H01F41/02 , C22C38/16 , C22C38/00
CPC分类号： H01F1/0577 , B22F3/02 , B22F3/16 , B22F9/023 , B22F2009/042 , B22F2009/044 , B22F2301/355 , B22F2304/05 , B22F2998/10 , C22C38/00 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/0573 , H01F41/0266 , H02K1/02
摘要： An RFeB system sintered magnet which does not contain a heavy rare-earth element RH (Dy, Tb and Ho) in a practically effective amount and yet is suited for applications in which the magnet undergoes a temperature increase during its use. The RFeB system sintered magnet contains at least one element selected from the group consisting of Nd and Pr as a rare-earth element R in addition to Fe and B while containing none of Dy, Tb and Ho, the magnet having a temperature characteristic value t(100-23) which satisfies −0.58
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公开(公告)号：US09396851B2
公开(公告)日：2016-07-19
申请号：US14114656
申请日：2012-12-27
发明人： Masato Sagawa , Tetsuhiko Mizoguchi
CPC分类号： H01F1/0536 , C22C33/0278 , C22C38/00 , C22C2202/02 , H01F1/0577 , H01F7/02 , H01F41/0293
摘要： A NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called RH) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the number of grain-boundary triple points at which the difference Ct−Cw between the RH content Ct (wt %) at the grain-boundary triple point and the RH content Cw (wt %) at a two-grain boundary portion leading to that grain-boundary triple point is equal to or smaller than 4 wt % is equal to or larger than 60% of the total number of grain-boundary triple points.
摘要翻译： 根据本发明的NdFeB系烧结磁体是具有通过使NdFeB系合金的粉末取向并用Dy和/或Tb烧结粉末制造的基材的NdFeB系烧结磁体（“Dy和/或Tb”为 通过晶界扩散处理从基材的表面附近并通过基材内的晶界而扩散的基体材料，其中RH含量之间的差Ct-Cw的晶界三重点的数量 在晶界三重点处的Ct（wt％）和导致该晶界三重点的两晶界部分的RH含量Cw（wt％）等于或大于4wt％ 超过粮食边界三分点总数的60％。
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