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71. 发明公开

EP2833376A1 NdFeB-BASED SINTERED MAGNET 审中-公开
标题翻译：钕铁硼基烧结磁体
公开(公告)号：EP2833376A1
公开(公告)日：2015-02-04
申请号：EP13769202.6
申请日：2013-03-26
申请人： INTERMETALLICS CO., LTD.
发明人： SAGAWA, Masato , FUJIMOTO, Naoki , KOMURA, Kazuyuki , MIZOGUCHI, Tetsuhiko
IPC分类号： H01F1/057 , B22F3/00 , B22F3/24 , B22F9/04 , C22C33/02 , C22C38/00 , H01F1/08 , H01F41/02
CPC分类号： H01F1/0577 , B22F3/24 , C22C33/0278 , C22C38/00 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , C22C2202/02 , H01F41/0293
摘要： The present invention has an object to provide a NdFeB system sintered magnet in which irreversible partial demagnetization and heat generation under a high temperature environment hardly occur. The NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet produced by diffusing Dy and/or Tb which are/is attached to a surface of a base material produced by orienting powder of a NdFeB system alloy in a magnetic field, and sintering the powder of the NdFeB system alloy, into grain boundaries inside the base material by grain boundary diffusion treatment, wherein a squareness ratio is equal to or higher than 95%. The NdFeB system sintered magnet like this can be produced by producing a base material of the NdFeB system sintered magnet by using a NdFeB system alloy with lamellas of a rare-earth rich phase dispersed substantially uniformly at predetermined spaces, as a starting alloy, and causing the alloy to occlude hydrogen, without performing heating for desorbing the occluded hydrogen thereafter until a sintering process, and applying grain boundary diffusion treatment to the base material.
摘要翻译：本发明的一个目的是提供一种NdFeB系烧结磁体，其中几乎不发生在高温环境下不可逆的部分退磁和发热。根据本发明的NdFeB系烧结磁体是一种NdFeB系烧结磁体，其通过扩散Dy和/或Tb而生成，所述Dy和/或Tb附着在通过使NdFeB系合金的粉末在磁场中取向而制成的基体材料的表面上，以及通过晶界扩散处理将NdFeB系合金的粉末烧结到基材内部的晶界中，其中矩形比等于或大于95％。这样的NdFeB系烧结磁铁可以如下制造：作为原料合金，使用具有以规定间隔大致均匀分散的富稀土相的薄片的NdFeB系合金制作NdFeB系烧结磁铁的母材，不进行用于解吸吸藏的氢的加热直至烧结工序，对基材进行晶界扩散处理。

72. 发明公开

EP2453448A4 NDFEB SINTERED MAGNET, AND PROCESS FOR PRODUCTION THEREOF 审中-公开
标题翻译： NDFEB-SINTERMAGNET UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2453448A4
公开(公告)日：2014-08-06
申请号：EP10797205
申请日：2010-07-09
申请人： INTERMETALLICS CO LTD
发明人： SAGAWA MASATO
IPC分类号： H01F1/053 , C22C38/00 , H01F1/057 , H01F1/08 , H01F41/02
CPC分类号： H01F41/0293 , B22D11/001 , B22F1/025 , B22F3/1017 , B22F3/24 , B22F9/04 , B22F2003/241 , B22F2003/248 , B22F2009/044 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2998/10 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , C23C10/30 , C23C12/02 , H01F1/053 , H01F1/0571 , H01F1/0577 , H01F1/086 , H01F7/02
摘要： Disclosed is a sintered NdFeB magnet having high coercivity (H cJ ) a high maximum energy product ((BH) max ) and a high squareness ratio (SQ) even when the sintered magnet has a thickness of 5 mm or more. The sintered NdFeB magnet is produced by diffusing Dy and/or Tb in grain boundaries in a base material of the sintered NdFeB magnet by a grain boundary diffusion process. The sintered NdFeB magnet is characterized in that the amount of rare earth in a metallic state in the base material is between 12.7 and 16.0% in atomic ratio, a rare earth-rich phase continues from the surface of the base material to a depth of 2.5 mm from the surface at the grain boundaries of the base material, and the grain boundaries in which R H has been diffused by the grain boundary diffusion process reach a depth of 2.5 mm from the surface.
摘要翻译：公开了即使当烧结磁体的厚度为5mm以上时，具有高矫顽力（H cJ），高最大能量积（（BH）max）和高矩形比（SQ）的烧结NdFeB磁体。烧结NdFeB磁体通过晶界扩散法在DyFeB磁体烧结体的基材中的晶界扩散Dy和/或Tb来制造。烧结NdFeB磁体的特征在于，基体材料中金属状态的稀土元素的原子比为12.7〜16.0％，稀土相从基材表面延伸至深度2.5 在基材的晶界处的表面为mm，并且通过晶界扩散工艺扩散的RH的晶界从表面到达2.5mm的深度。

73. 发明公开

EP2693451A1 SINTERED NEODYMIUM MAGNET 审中-公开
标题翻译： GESINTERTER NEODYM-MAGNET
公开(公告)号：EP2693451A1
公开(公告)日：2014-02-05
申请号：EP12863911.9
申请日：2012-12-27
申请人： Intermetallics Co., Ltd.
发明人： SAGAWA, Masato , MIZOGUCHI, Tetsuhiko
IPC分类号： H01F1/08 , B22F1/00 , B22F3/00 , C22C33/02 , H01F1/057 , H01F41/02
CPC分类号： H01F1/0577 , C22C33/0278 , C22C38/00 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , C22C2202/02 , H01F1/057 , H01F41/0293
摘要： Provided is a NdFeB system sintered magnet which is produced by the grain boundary diffusion method and yet has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. 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 R H ) 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 C gx -C x between the R H content C gx (wt%) in the grain boundary and the R H content C x (wt%) in main-phase grains which are grains constituting the base material at the same depth within a range from the surface to which R H is attached to a depth of 3 mm is equal to or larger than 3 wt%.
摘要翻译：提供了通过晶界扩散法制造的NdFeB系烧结磁体，但是具有高的矫顽力和矩形比，而最大能量乘积只有很小的降低。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烧结粉末而制成的基材的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着并扩散通过基材内的晶界而附着并扩散的基体材料，其中，RH含量C gx（wt％）之间的差C g x -C x 在从RH附着的表面到3mm深度的范围内，构成基材的相同深度的主晶相的主晶相中的晶界和RH含量C x（wt％）等于或大于超过3重量％。

74. 发明公开

EP2472535A4 NdFeB SINTERED MAGNET PRODUCTION METHOD AND PRODUCTION DEVICE, AND NdFeB SINTERED MAGNET PRODUCED WITH SAID PRODUCTION METHOD 审中-公开
标题翻译：用于生产钕 - 铁 - 硼烧结磁体和在这个过程中的方法和装置由钕 - 铁 - 硼烧结磁铁
公开(公告)号：EP2472535A4
公开(公告)日：2013-10-30
申请号：EP10811985
申请日：2010-08-27
申请人： INTERMETALLICS CO LTD
发明人： SAGAWA MASATO , MIZOGUCHI TETSUHIKO , ASAZUMA MICHIYASU , HAYASHI SHINICHI
IPC分类号： H01F41/02 , B22F1/00 , B22F3/00 , B22F3/02 , B22F3/10 , C22C33/02 , C22C38/00 , H01F1/053 , H01F1/08
CPC分类号： C22C33/02 , B22F3/005 , B22F3/10 , B22F2998/00 , B22F2999/00 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/0577 , H01F41/0266 , H01F41/0273 , B22F3/004 , B22F3/02 , B22F2202/05

75. 发明公开

EP2597660A2 Method and system for manufacturing sintered rare-earth magnet having magnetic anisotropy 审中-公开
标题翻译： Verfahren und System zur Herstellung eines gesinterten Seltenerdmagneten mit magnetischer Anisotropie
公开(公告)号：EP2597660A2
公开(公告)日：2013-05-29
申请号：EP12195828.4
申请日：2005-06-30
申请人： INTERMETALLICS CO., LTD.
发明人： Sagawa, Masato , Nagata, Hiroshi , Itatani, Osamu
IPC分类号： H01F41/02 , B22F3/00 , B22F3/02 , B22F3/087 , C22C1/04 , C22C33/02
CPC分类号： H01F41/0246 , B22F3/1021 , B22F2998/10 , C22C1/0433 , C22C33/0278 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/0557 , H01F1/0577 , H01F41/0273 , B22F2201/10 , B22F9/08 , B22F3/004 , B22F2202/01 , B22F3/005 , B22F2202/05 , B22F9/04
摘要： To improve the performance of a rare-earth magnet, it is effective to use a low-oxidized powder having a small grain size. One objective of the present invention is to provide a method for manufacturing a sintered rare-earth magnet having a magnetic anisotropy, in which a very active powder having a small grain size can be safely used in a low-oxidized state. Another objective is to provide a method capable of efficiently manufacturing products having various shapes. In a weighing and loading section 41 and a high-density loading section 42, a fine powder as a material of the sintered rare-earth magnet having a magnetic anisotropy is loaded into a mold until its density reaches a predetermined level. Then, in a magnetic orientation section 43, the fine powder is oriented by a pulsed magnetic field. Subsequently, the fine powder is not compressed but immediately sintered in a sintering furnace 44. The present method enables the mass-producing machine to be simple in its operation and its housing to be accordingly smaller, so that it will be possible to eliminate the danger of oxidization or burning of the powder, which has been a serious problem for a conventional method that uses a large-scale die-pressing machine. Furthermore, the manufacturing efficiency can be improved by using a multi-cavity mold for manufacturing a sintered rare-earth magnet having an industrially important shape, such as a plate magnet or an arched plate magnet.
摘要翻译：为了提高稀土类磁铁的性能，使用粒径小的低氧化物粉末是有效的。本发明的一个目的是提供一种制造具有磁各向异性的稀土类烧结磁体的方法，其中可以以低氧化状态安全地使用具有小晶粒尺寸的非常活泼的粉末。另一个目标是提供能够有效地制造具有各种形状的产品的方法。在称重装载部41和高密度装载部42中，将作为具有磁各向异性的稀土类烧结磁体的材料的细粉末装载到模具中，直到其密度达到预定水平。然后，在磁性取向部43中，细粉末通过脉冲磁场取向。随后，细粉末不被压缩，但是在烧结炉44中立即烧结。本发明的方法使得批量生产机器的操作简单，并且壳体相应地更小，从而可以消除危险的粉末的氧化或燃烧，这对于使用大型压模机的常规方法而言是严重的问题。此外，通过使用多腔模具来制造具有工业上重要的形状的烧结稀土类磁体，例如板状磁铁或拱形磁体磁铁，可以提高制造效率。

76. 发明公开

EP2597659A2 Method and system for manufacturing sintered rare-earth magnet having magnetic anisotropy 审中-公开
公开(公告)号：EP2597659A2
公开(公告)日：2013-05-29
申请号：EP12195806.0
申请日：2005-06-30
申请人： INTERMETALLICS CO., LTD.
发明人： Sagawa, Masato , Nagata, Hiroshi , Itatani, Osamu
IPC分类号： H01F41/02 , B22F3/00 , B22F3/02 , B22F3/087 , C22C1/04 , C22C33/02
CPC分类号： H01F41/0246 , B22F3/1021 , B22F2998/10 , C22C1/0433 , C22C33/0278 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/0557 , H01F1/0577 , H01F41/0273 , B22F2201/10 , B22F9/08 , B22F3/004 , B22F2202/01 , B22F3/005 , B22F2202/05 , B22F9/04
摘要： To improve the performance of a rare-earth magnet, it is effective to use a low-oxidized powder having a small grain size. One objective of the present invention is to provide a method for manufacturing a sintered rare-earth magnet having a magnetic anisotropy, in which a very active powder having a small grain size can be safely used in a low-oxidized state. Another objective is to provide a method capable of efficiently manufacturing products having various shapes. In a weighing and loading section 41 and a high-density loading section 42, a fine powder as a material of the sintered rare-earth magnet having a magnetic anisotropy is loaded into a mold until its density reaches a predetermined level. Then, in a magnetic orientation section 43, the fine powder is oriented by a pulsed magnetic field. Subsequently, the fine powder is not compressed but immediately sintered in a sintering furnace 44. The present method enables the mass-producing machine to be simple in its operation and its housing to be accordingly smaller, so that it will be possible to eliminate the danger of oxidization or burning of the powder, which has been a serious problem for a conventional method that uses a large-scale die-pressing machine. Furthermore, the manufacturing efficiency can be improved by using a multi-cavity mold for manufacturing a sintered rare-earth magnet having an industrially important shape, such as a plate magnet or an arched plate magnet.

77. 发明公开

EP2239747A1 PROCESS FOR PRODUCTION OF NdFeB SINTERED MAGNETS AND NDFEB SINTERED MAGNETS 审中-公开
标题翻译：钕铁硼钕铁硼钕铁硼钕铁硼磁铁
公开(公告)号：EP2239747A1
公开(公告)日：2010-10-13
申请号：EP09700197.8
申请日：2009-01-09
申请人： INTERMETALLICS CO., LTD.
发明人： SAGAWA, Masato , FUJIMOTO, Naoki
IPC分类号： H01F41/02 , B22F3/24 , C22C38/00 , H01F1/053 , H01F1/08
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：本发明的目的在于提供一种用于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，然后进行用于扩散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）磁体基材中金属状态的稀土元素含量等于或高于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。

78. 发明公开

EP1788594A4 PRODUCTION METHOD FOR MAGNETIC-ANISOTROPY RARE-EARTH SINTERED MAGNET AND PRODUCTION DEVICE THEREFOR 有权
标题翻译： HERSTELLUNGSVERFAHRENFÜRMAGNETISCH ANISOTROPEN SELTENERD-SINTERMAGNET UND HERSTELLUNGSVORRICHTUNGDAFÜR
公开(公告)号：EP1788594A4
公开(公告)日：2010-07-14
申请号：EP05765338
申请日：2005-06-30
申请人： INTERMETALLICS CO LTD
发明人： SAGAWA MASATO , NAGATA HIROSHI , ITATANI OSAMU
IPC分类号： H01F41/02 , B22F3/00 , B22F3/02 , B22F3/087 , C22C1/04 , C22C33/02
CPC分类号： H01F41/0246 , B22F3/1021 , B22F2998/10 , C22C1/0433 , C22C33/0278 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/0557 , H01F1/0577 , H01F41/0273 , B22F2201/10 , B22F9/08 , B22F3/004 , B22F2202/01 , B22F3/005 , B22F2202/05 , B22F9/04

79. 发明公开

EP2187410A1 PROCESS FOR PRODUCING SINTERED NdFeB MAGNET AND MOLD FOR PRODUCING SINTERED NdFeB MAGNET 有权
标题翻译：用于生产烧结钕铁硼磁体和模具生产烧结钕铁硼磁体
公开(公告)号：EP2187410A1
公开(公告)日：2010-05-19
申请号：EP08827794.2
申请日：2008-08-20
申请人： INTERMETALLICS CO., LTD. , Mitsubishi Corporation
发明人： SAGAWA, Masato
IPC分类号： H01F41/02 , B22F3/10 , H01F1/053 , H01F1/08
CPC分类号： H01F41/0273 , B22F3/087 , B22F2998/00 , B22F2998/10 , B22F2999/00 , C22C2202/02 , H01F1/0577 , H01F41/0266 , C22C33/02 , B22F3/004 , B22F3/10 , B22F3/02 , B22F2202/05 , B22F3/1216
摘要： The objective of the present invention is to provide a method for making a NdFeB sintered magnet without an occurrence of a curve or deformation, by using a mold which is inexpensive, easy to be machined, and will not be embrittled. The present invention also provides such a mold. In the present invention, at least a part (e.g. a bottom plate 11) in the mold is made of a carbon material. This enables a production of a NdFeB sintered magnet without an occurrence of a curve or deformation caused by a friction due to a sintering shrinkage, because the friction between a carbon material and a sintered compact in a sintering process is lower than that between metal and a sintered compact. What is more, a carbon material is advantageous in that it is inexpensive, easy to be machined, and will not be embrittled even after repeated uses of the mold. Such effects can be particularly obtained by using a carbon material as the bottom plate 11, which is subjected to the load of the sintered compact in the sintering process.

80. 发明公开

EP2071597A1 METHOD FOR PRODUCING SINTERED NdFeB MAGNET 有权转让
标题翻译：制造方法烧结钕铁硼磁体
公开(公告)号：EP2071597A1
公开(公告)日：2009-06-17
申请号：EP07790283.1
申请日：2007-07-23
申请人： INTERMETALLICS CO., LTD.
发明人： SAGAWA, Masatoc/o INTERMETALLICS CO., LTD.,
IPC分类号： H01F41/02 , B22F1/00 , B22F3/24 , C22C38/00 , H01F1/053 , H01F1/08
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.

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