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公开(公告)号：US09640319B2
公开(公告)日：2017-05-02
申请号：US13514943
申请日：2010-10-08
IPC分类号： H01F1/09 , H01F7/02 , H01F41/02 , B22F1/02 , C22C33/02 , C22C38/00 , C22C38/06 , C22C38/16 , H01F1/057
CPC分类号： H01F1/0578 , B22F1/0007 , B22F1/025 , B22F9/023 , B22F9/04 , B22F2301/355 , B22F2998/10 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/12 , C22C38/16 , H01F1/0572 , H01F7/02 , H01F7/0221 , H01F41/0293
摘要： The anisotropic rare earth magnet powder of the present invention includes powder particles having R2TM14B1-type crystals of a tetragonal compound of a rare earth element (R), boron (B), and a transition element (TM) having an average crystal grain diameter of 0.05 to 1 μm, and enveloping layers containing at least a rare earth element (R′) and copper (Cu) and enveloping surfaces of the crystals. Owing to the presence of the enveloping layers, coercivity of the anisotropic rare earth magnet powder can be remarkably enhanced without using a scarce element such as Ga and Dy.
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公开(公告)号：US07138018B2
公开(公告)日：2006-11-21
申请号：US10529547
申请日：2004-01-15
CPC分类号： H01F1/0573 , H01F41/0293
摘要： A method for manufacturing an anisotropic magnet powder includes a high-temperature hydrogenation process of holding an RFeB-based alloy containing rare earth elements (R), B and Fe as main ingredients in a treating atmosphere under a first treating pressure (P1) of which a hydrogen partial pressure ranges from 10 to 100 kPa and at a first treating temperature (T1) which ranges from 953 to 1133 K, a structure stabilization process of holding the RFeB-based alloy after the high-temperature hydrogenation process under a second treating pressure (P2) of which a hydrogen partial pressure is 10 or more and at a second treating temperature (T2) which ranges from 1033 to 1213 K such that the condition T2>T1 or P2>P1 is satisfied, a controlled evacuation process of holding the RFeB-based alloy after the structure stabilization process in a treating atmosphere under a third treating pressure (P3) of which a hydrogen partial pressure ranges from 0.1 to 10 kPa and at a third treating temperature (T3) which ranges from 1033 to 1213 K, and a forced evacuation process of removing residual hydrogen (H) from the RFeB-based alloy after the controlled evacuation process. With this method, the magnetic properties of the anisotropic magnet powder can be improved.
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公开(公告)号：US6113846A
公开(公告)日：2000-09-05
申请号：US212860
申请日：1998-12-17
CPC分类号： H01F1/0553 , H01F1/0573 , H01F41/0253
摘要： An apparatus that gives continuous hydrogen heat treatment to anisotropic rare earth magnet powders is invented. The apparatus a comprises shopper 12, a furnace 11 to carry out a hydrogen heat treatment, a heat compensating means 14 that is placed in the heating room of the furnace to keep the treatment temperature constant, a movable stopper 15 to support the material in the heating room of the furnace 11 and a cooling container 18. The raw magnet powder is fed into the furnace 11 and supported by the stopper 15, then hydrogen heat treatment is carried out. After the treatment the stopper opens the bottom end of the heating room and the processed magnet powder falls into the cooling room. By the operation described above, the present apparatus can carry out continuous hydrogen heat treatment without stopping the heating of the furnace batch by batch. Continuous hydrogen heat treatment greatly improves the production efficiency and quality of the processed magnet powder.
摘要翻译： 发明了对各向异性稀土磁体粉末进行连续氢热处理的装置。 设备a包括购物者12，执行氢热处理的炉11，放置在炉的加热室中以保持处理温度恒定的热补偿装置14，用于将材料支撑在炉中的可移动止动件15 炉11的加热室和冷却容器18.将原料粉末进料到炉11中并由止动器15支撑，然后进行氢热处理。 处理后，止动器打开加热室的底端，加工的磁铁粉末落入冷却室。 通过上述操作，本发明的装置可以不间断地逐步加热炉批次进行连续的氢热处理。 连续氢热处理大大提高了加工磁粉的生产效率和质量。
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公开(公告)号：US20120299675A1
公开(公告)日：2012-11-29
申请号：US13514942
申请日：2010-08-27
申请人： Yoshinobu Honkura , Chisato Mishima
发明人： Yoshinobu Honkura , Chisato Mishima
CPC分类号： C22C1/0441 , C22C38/005 , H01F1/0576 , H01F41/0293
摘要： A method for producing an anisotropic rare earth magnet according to the present invention comprises a forming step of obtaining a formed body by press-forming a mixed raw material of a magnet raw material capable of generating R2TM14B1-type crystals of a tetragonal compound of a rare earth element (R), boron (B), and a transition element (TM), and a diffusion raw material to serve as a supply source of at least a rare earth element (R′) and Cu; and a diffusing step of diffusing at least R′ and Cu onto surfaces or into crystal grain boundaries of the R2TM14B1-type crystals by heating the formed body. In this production method, the diffusion raw material having a low melting point and high wettability envelops the R2TM14B1-type crystals, and therefore an anisotropic rare earth magnet having high coercivity can be obtained without decreasing magnetization which should be inherently exhibited by the magnet raw material.
摘要翻译： 根据本发明的各向异性稀土磁体的制造方法包括以下形成步骤：通过压制成型能够产生稀有的四方晶格化合物的R2TM14B1型晶体的磁铁原料的混合原料来获得成形体 土壤元素（R），硼（B）和过渡元素（TM），以及用作至少稀土元素（R'）和Cu的供给源的扩散原料; 以及通过加热成形体将至少R'和Cu扩散至R2TM14B1型晶体的表面或晶界的扩散步骤。 在该制造方法中，具有低熔点和高润湿性的扩散原料包围R2TM14B1型晶体，因此可以获得具有高矫顽力的各向异性稀土磁体，而不会降低磁体原料固有地显示的磁化强度 。
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5.发明申请ANISOTROPIC RARE EARTH MAGNET POWDER, METHOD FOR PRODUCING THE SAME, AND BONDED MAGNET 有权各向异性稀土磁粉，其制造方法和粘结磁铁公开(公告)号：US20130009736A1
公开(公告)日：2013-01-10
申请号：US13514943
申请日：2010-10-08
CPC分类号： H01F1/0578 , B22F1/0007 , B22F1/025 , B22F9/023 , B22F9/04 , B22F2301/355 , B22F2998/10 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/12 , C22C38/16 , H01F1/0572 , H01F7/02 , H01F7/0221 , H01F41/0293
摘要： The anisotropic rare earth magnet powder of the present invention includes powder particles having R2TM14B1-type crystals of a tetragonal compound of a rare earth element (R), boron (B), and a transition element (TM) having an average crystal grain diameter of 0.05 to 1 μm, and enveloping layers containing at least a rare earth element (R′) and copper (Cu) and enveloping surfaces of the crystals. Owing to the presence of the enveloping layers, coercivity of the anisotropic rare earth magnet powder can be remarkably enhanced without using a scarce element such as Ga and Dy.
摘要翻译： 本发明的各向异性稀土类磁体粉末包括粉末颗粒，其具有稀土元素（R），硼（B）和平均晶粒直径为（B））的过渡元素（TM）的四方晶格的R2TM14B1型晶体， 0.05〜1μm，包含至少含有稀土元素（R'）和铜（Cu）的包层和晶体的包络面。 由于存在包层，因此可以显着提高各向异性稀土磁体粉末的矫顽力，而不需要使用诸如Ga和Dy的稀缺元素。
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公开(公告)号：US6056830A
公开(公告)日：2000-05-02
申请号：US947340
申请日：1997-10-08
CPC分类号： H01F1/0573 , C21D6/00 , C21D1/74
摘要： A rare earth permanent magnet powder having high anisotropy, that means Br/Bs of more than 0.65, is produced by applying present invented hydrogen heat treatment. The rare earth permanent magnet powder consists essentially of rare earth element including yttrium, iron, and boron. It is subjected to hydrogen heat treatment accompanied with phase transformations. The treatment is carried out at the relative reaction rate within the range of 0.25-0.50 at 830.degree. C. and hydrogen pressure of 0.1 MPa. Here the relative reaction rate is defined as the ratio of actual reaction rate to the standard reaction rate which measured at the temperature of 830.degree. C. and hydrogen pressure of 0.1 MPa.
摘要翻译： 通过应用本发明的氢热处理制造具有高各向异性的稀土永磁体粉末，这意味着大于0.65的Br / B。 稀土永磁体粉末基本上由稀土元素组成，包括钇，铁和硼。 伴随着相转变而进行氢热处理。 处理以相对反应速率在830℃的0.25-0.50℃和0.1MPa的氢气压力下进行。 这里的相对反应速率定义为在830℃的温度和0.1MPa的氢气压力下测量的实际反应速率与标准反应速率之比。
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公开(公告)号：US06444052B1
公开(公告)日：2002-09-03
申请号：US09417134
申请日：1999-10-13
申请人： Yoshinobu Honkura , Chisato Mishima
发明人： Yoshinobu Honkura , Chisato Mishima
IPC分类号： H01F1055
CPC分类号： C22C38/005 , B22F9/023 , B22F2998/00 , C22C38/002 , H01F1/0573 , C22C1/0441
摘要： A production method to produce an anisotropic NdFeB based alloy magnet having a high anisotropic ratio and coercivity by a simple procedure. The production method consists of a first hydrogenation process, a second hydrogenation process and a desorption process. The first hydrogenation process at a low temperature produces the hydride that stores hydrogen needed in advance of the phase transformation. After that, the second hydrogenation process at an elevated temperature proceeds smoothly at a moderate reaction rate of the phase transformation and produces the mixture of NdH2, Fe and Fe2 B from the hydride in addition to making the crystallographic orientation of Fe2 B phase consistent with the original R2 Fe14 B matrix phase. Subsequently, the desorption process produces the fine grained microstructure of Nd2 Fe14 BHx with high degrees of alignment of the crystallographic orientation consistent with the original crystallographic orientation of Fe2 B phase. Fine and uniform grained microstructure of RFeB based alloy is produced by recombination of the mixture during the hydrogen heat treatment and consequently offers the anisotropic rare earth magnet powder to have a high anisotropic ratio and high coercivity.
摘要翻译： 通过简单的程序制造具有高各向异性比和矫顽力的各向异性NdFeB基合金磁体的制造方法。 该制备方法由第一加氢方法，第二加氢方法和解吸过程组成。 在低温下的第一个氢化过程产生氢化物，其存储在相变之前所需的氢。 之后，在升高的温度下的第二次氢化过程以相变的中等反应速率平稳地进行，并且除了使Fe2B相的晶体取向与本发明的Fe2B相的晶体取向一致外，还从氢化物中产生NdH2，Fe和Fe2B的混合物 原始R2 Fe14B基体相。 随后，解吸过程产生Nd 2 Fe 14 BH x的细晶粒微结构，其结晶取向与Fe2B相的原始晶体取向一致。 通过在氢热处理期间混合物的复合产生RFeB基合金的细小且均匀的微观结构，因此提供各向异性稀土磁体粉末具有高各向异性比和高矫顽力。
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8.发明授权
公开(公告)号：US5643491A
公开(公告)日：1997-07-01
申请号：US290819
申请日：1994-08-17
申请人： Yoshinobu Honkura , Hironari Mitarai , Chisato Mishima , Yoshikazu Amahiro , Hiroshi Matsuoka , Yoshinobu Sugiura
发明人： Yoshinobu Honkura , Hironari Mitarai , Chisato Mishima , Yoshikazu Amahiro , Hiroshi Matsuoka , Yoshinobu Sugiura
CPC分类号： H01F1/0573 , B22F9/023
摘要： In a method of fabricating an R--Fe--B based alloy magnetic powder excellent in magnetic anisotropy, and an R--Fe--B--Co based alloy magnetic powder excellent in magnetic anisotropy and temperature characteristic an R--Fe--B based alloy is subjected to hydrogenation under pressurized hydrogen gas and to dehydrogenation. Excellent magnetic properties and stable with less variation in range can be attained in an industrial fabrication by using a plurality of divided reaction tubes. Moreover, the R--Fe--B--Co based alloy magnetic powder is constituted of an aggregate structure including, as a main phase, a recrystallized structure of an extremely fine R.sub.2 Fe.sub.14 B type phase with an average grain size of 0.05 to 3 .mu.m, and has excellent magnetic anisotropy and temperature characteristic. Additionally, a resin bonded magnet excellent in magnetic properties and temperature characteristic is fabricated by injection molding or compression molding using the above R--Fe--B--Co based alloy magnetic powder.
摘要翻译： PCT No.PCT / JP93 / 01863 Sec。 371日期：1994年8月17日 102（e）日期1994年8月17日PCT提交1993年12月24日PCT公布。 第WO94 / 15345号公报 日本时间1994年7月7日在制造磁各向异性优异的R-Fe-B系合金磁粉的制造方法中，R-Fe-B系合金磁铁具有优异的磁各向异性和温度特性的R-Fe-B-Co系合金磁粉， B基合金在加压氢气下进行氢化并脱氢。 通过使用多个分开的反应管，可以在工业制造中获得优异的磁性和稳定性，同时具有较小的范围变化。 此外，R-Fe-B-Co系合金磁粉由具有平均粒径为0.05〜3μm的极细的R2Fe14B型相的再结晶组织作为主相的集合体构成， 具有优异的磁各向异性和温度特性。 另外，通过使用上述R-Fe-B-Co系合金磁粉的注射成型或压缩成型制造磁特性和温度特性优异的树脂粘结磁体。
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公开(公告)号：US20060048855A1
公开(公告)日：2006-03-09
申请号：US10529547
申请日：2004-01-15
IPC分类号： H01F1/06
CPC分类号： H01F1/0573 , H01F41/0293
摘要： A method for manufacturing an anisotropic magnet powder includes a high-temperature hydrogenation process of holding an RFeB-based alloy containing rare earth elements (R), B and Fe as main ingredients in a treating atmosphere under a first treating pressure (P1) of which a hydrogen partial pressure ranges from 10 to 100 kPa and at a first treating temperature (T1) which ranges from 953 to 1133 K, a structure stabilization process of holding the RFeB-based alloy after the high-temperature hydrogenation process under a second treating pressure (P2) of which a hydrogen partial pressure is 10 or more and at a second treating temperature (T2) which ranges from 1033 to 1213 K such that the condition T2>T1 or P2>P1 is satisfied, a controlled evacuation process of holding the RFeB-based alloy after the structure stabilization process in a treating atmosphere under a third treating pressure (P3) of which a hydrogen partial pressure ranges from 0.1 to 10 kPa and at a third treating temperature (T3) which ranges from 1033 to 1213 K, and a forced evacuation process of removing residual hydrogen (H) from the RFeB-based alloy after the controlled evacuation process. With this method, the magnetic properties of the anisotropic magnet powder can be improved.
摘要翻译： 制造各向异性磁体粉末的方法包括：在处理气氛中，在第一处理压力（P 1）下，将含有稀土元素（R），B和Fe作为主要成分的RFeB系合金保持在 氢分压为10〜100kPa，第一处理温度（T 1）为953〜1133K，第二次为高温氢化处理后的RFeB系合金的结构稳定化工序 处理压力（P 2），其中氢分压为10以上，处理温度（T 2）为1033〜1213K，使得条件T 2> T 1或P 2> P 1满足 在处于分解压力为0.1〜10kPa的第三处理压力（P 3）和第三处理压力（P 3）的处理气氛中，在结构稳定化处理之后保持RFeB系合金的受控抽空处理 温度（T 3）为1033〜1213K，在受控排气处理之后，从RFeB系合金除去残留氢（H）的强制抽空处理。 通过该方法，能够提高各向异性磁铁粉末的磁特性。
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10.发明授权Alloy for bonded magnets, isotropic magnet powder and anisotropic magnet powder and their production method, and bonded magnet 失效用于粘结磁体的合金，各向同性磁体粉末和各向异性磁体粉末及其制造方法和粘结磁体公开(公告)号：US06955729B2
公开(公告)日：2005-10-18
申请号：US10182724
申请日：2002-06-28
IPC分类号： H01F1/057
CPC分类号： H01F1/0578 , H01F1/0573
摘要： An alloy for bonded magnets of the present invention includes at least a main component of iron (Fe), 12-16 atomic % (at %) of rare-earth elements (R) including yttrium (Y), and 10.8-15 at % of boron (B), and is subjected to a hydrogen treatment method as HDDR process or d-HDDR process.Using the magnet powder obtained from carrying out d-HDDR processing, etc. on this magnet alloy, pellets with superior insertion characteristics into bonded magnet molding dies can be obtained, and bonded magnets with superior magnetic properties and showing low cost can be obtained.
摘要翻译： 本发明的粘结磁体用合金至少包括含有钇（Y）的稀土元素（R）为12〜16原子％（原子％）的铁（Fe）和10.8〜15原子％的主成分， 的硼（B），并且进行氢处理方法作为HDDR方法或d-HDDR方法。 使用在该磁体合金上进行d-HDDR处理等得到的磁铁粉末，可以获得具有优异插入特性的粘结磁体成型模具的颗粒，并且可以获得具有优异的磁性能并且显示低成本的粘结磁体。
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