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公开(公告)号：US07314531B2
公开(公告)日：2008-01-01
申请号：US10799153
申请日：2004-03-11
IPC分类号： H01F1/057
CPC分类号： H01F1/0577
摘要： A sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the main phase, wherein a platy or acicular product exists. This sintered body enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to improve a suitable sintering temperature range.
摘要翻译： 一种烧结体，其包含由R 2 2 T 14 B相构成的主相（其中R表示一种或多种稀土元素（使得稀土元素包括Y） ，T表示一种或多种基本上含有Fe或Fe和Co的过渡金属元素，以及含有比主相高的R的晶界相，其中存在片状或针状产物。 该烧结体能够抑制晶粒生长，同时将磁特性降低至最小，并提高合适的烧结温度范围。
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公开(公告)号：US07311788B2
公开(公告)日：2007-12-25
申请号：US10675230
申请日：2003-09-29
IPC分类号： H01F1/057
CPC分类号： C22C28/00 , C22C1/0441 , C22C30/00 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/0557 , H01F1/0577 , H01F41/0253
摘要： A sintered body with a composition consisting of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, provided that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe. This sintered body has a coefficient of variation (CV value) showing the dispersion degree of Zr of 130 or less. In addition, this sintered body has a grain boundary phase comprising a region that is rich both in at least one element selected from a group consisting of Cu, Co and R, and in Zr. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.
摘要翻译： 具有25重量％至35重量％的R（其中R表示一种或多种稀土元素，条件是稀土元素包括Y），0.5重量％至4.5重量％的B组成的烧结体，0.02重量％ 至0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不包括0）的Co，余量实质上为Fe。 该烧结体具有显示Zr的分散度为130以下的变异系数（CV值）。 此外，该烧结体具有包含富含选自Cu，Co和R中的至少一种元素的区域和在Zr中的区域的晶界相。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。
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公开(公告)号：US07192493B2
公开(公告)日：2007-03-20
申请号：US10675912
申请日：2003-09-29
IPC分类号： H01F1/057
CPC分类号： H01F41/0253 , H01F1/0557 , H01F1/0577
摘要： A sintered body with a composition consisting of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, providing that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe, wherein a coefficient of variation (CV) showing the dispersion of Zr is 130 or lower. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.
摘要翻译： 一种组成为25重量％至35重量％的R组成的烧结体（其中R表示一种或多种稀土元素，条件是稀土元素包括Y），0.5重量％至4.5重量％的B，0.02重量％ 至0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不含0）的Co，余量实质上为Fe，其中变异系数（CV） 显示Zr的分散体为130以下。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。
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公开(公告)号：US07255752B2
公开(公告)日：2007-08-14
申请号：US10799243
申请日：2004-03-11
IPC分类号： H01F1/057
CPC分类号： H01F1/0577 , H01F41/0293
摘要： A method for manufacturing an R-T-B system rare earth permanent magnet that is a sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the above main phase, wherein a product that is rich in Zr exists in the above R2T14B phase, the above manufacturing method comprising the steps of: preparing an R-T-B alloy containing as a main component the R2T14B phase and also containing Zr, and an R-T alloy containing R and T as main components, wherein the amount of R is higher than that of the above R-T-B alloy; obtaining a mixture of the R-T-B alloy powder and the R-T alloy powder; preparing a compacted body with a certain form from the above mixture; and sintering the above compacted body, wherein, in the above sintering step, the above product is generated in the above R2T14B phase.
摘要翻译： 一种用于制造RTB系稀土永磁体的方法，该稀土永磁体是包括由R 2 T 14 B相（其中R表示一个或多个）的主相的烧结体 稀土元素（含有Y的稀土元素），T表示基本上含有Fe或Fe，Co的一种以上的过渡金属元素，以及比上述主相含有更多的R的晶界相， 其中富含Zr的产物存在于上述R 2 T 14 B相中，上述制备方法包括以下步骤：制备含有主要的RTB合金 组成R 2 T 14 T B相并且还含有Zr，以及含有R和T作为主要成分的RT合金，其中R的量高于 以上RTB合金; 得到R-T-B合金粉末和R-T合金粉末的混合物; 从上述混合物制备具有某种形式的压实体; 并烧结上述压实体，其中在上述烧结步骤中，在上述R 2 T 14 B相中产生上述产物。
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公开(公告)号：US07255751B2
公开(公告)日：2007-08-14
申请号：US10675797
申请日：2003-09-29
IPC分类号： H01F1/057
CPC分类号： H01F41/0253 , H01F1/0557 , H01F1/0577
摘要： When an R-T-B system rare earth permanent magnet is obtained by a mixing method to obtain a sintered body with a composition consisting essentially of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, providing that the rare earth elements include Y), 0.5% to 4.5% by weight of B, 0.02% to 0.6% by weight of Al and/or Cu, 0.03% to 0.25% by weight of Zr, 4% or less by weight (excluding 0) of Co, and the balance substantially being Fe, wherein a coefficient of variation (CV) showing the dispersion of Zr is 130 or lower, Zr is contained in a low R alloy. This sintered body enables to inhibit the grain growth, while keeping the decrease of magnetic properties to a minimum, and to improve the suitable sintering temperature range.
摘要翻译： 当通过混合方法获得具有组成基本上由25％至35％的R组成的烧结体获得RTB系稀土永磁体时（其中R表示一种或多种稀土元素，条件是稀土元素 元素包括Y），0.5〜4.5重量％的B，0.02〜0.6重量％的Al和/或Cu，0.03〜0.25重量％的Zr，4重量％以下（不含0） Co，余量基本上为Fe，其中显示Zr分散的变异系数（CV）为130以下，Zr含有低R合金。 该烧结体能够在保持磁特性降低至最小的同时抑制晶粒生长，并且可提高合适的烧结温度范围。
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公开(公告)号：US06811620B2
公开(公告)日：2004-11-02
申请号：US10799203
申请日：2004-03-11
IPC分类号： H01F1053
CPC分类号： H01F1/0577 , H01F41/0293
摘要： An R—T—B system rare earth permanent magnet, which is a sintered body comprising: a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co); and a grain boundary phase containing a higher amount of R than the above main phase, wherein a product that is rich in Zr exists in the above R2T14B phase. The product that is rich in Zr has a platy or acicular form. The R—T—B system rare earth permanent magnet containing the product enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to obtain a wide suitable sintering temperature range.
摘要翻译： 一种RTB系稀土永磁体，其为烧结体，包括：由R2T14B相（其中R表示一种或多种稀土元素（提供稀土元素包括Y））组成的主相，T表示一种或多种 过渡金属元素基本上含有Fe或Fe和Co）; 以及含有比上述主相含量更高的R的晶界相，其中在上述R2T14B相中存在富含Zr的产物。 富含Zr的产品具有扁平或针状。 含有该产品的R-T-B系稀土永磁体能够抑制晶粒生长，同时将磁性降低至最小，并获得宽的合适的烧结温度范围。
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公开(公告)号：US5834663A
公开(公告)日：1998-11-10
申请号：US824008
申请日：1997-03-25
申请人： Akira Fukuno , Hideki Nakamura , Gouichi Nishizawa
发明人： Akira Fukuno , Hideki Nakamura , Gouichi Nishizawa
CPC分类号： H01F1/0577 , B22F3/1103 , B22F2998/10
摘要： In the manufacture of a rare earth sintered magnet of the Nd.sub.2 Fe.sub.14 B system, closed voids are formed in the magnet in a predetermined fraction to minimize shrinkage. Unlike open voids or pores in conventional semi-sintered magnets, the closed voids do not incur magnet corrosion since they do not communicate to the magnet exterior. By minimizing shrinkage during sintering in this way, a ring or plate-shaped thin wall anisotropic magnet can be prepared without machining for shape correction, achieving a cost reduction and a productivity improvement. Since a high density compact has a high deflective strength, it is easy to handle, minimizing cracking and chipping between the compacting and sintering steps.
摘要翻译： 在制造Nd2Fe14B系稀土烧结磁体时，以预定的比例在磁体中形成封闭的空隙，以使收缩率最小化。 与常规半烧结磁体中的开放空隙或孔不同，封闭的空隙不会引起磁体腐蚀，因为它们不与磁体外部连通。 通过以这种方式使烧结期间的收缩最小化，可以在不进行形状校正的机械加工的情况下制备环形或板状的薄壁各向异性磁体，从而实现成本降低和生产率提高。 由于高密度压块具有高的偏转强度，因此易于处理，使压实和烧结步骤之间的裂纹和碎裂最小化。
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公开(公告)号：US5641363A
公开(公告)日：1997-06-24
申请号：US364756
申请日：1994-12-27
申请人： Akira Fukuno , Hideki Nakamura , Gouichi Nishizawa
发明人： Akira Fukuno , Hideki Nakamura , Gouichi Nishizawa
CPC分类号： H01F1/0577 , B22F3/1103 , B22F2998/10
摘要： In the manufacture of a rare earth sintered magnet of the Nd.sub.2 Fe.sub.14 B system, closed voids are formed in the magnet in a predetermined fraction to minimize shrinkage. Unlike open voids or pores in conventional semi-sintered magnets, the closed voids do not incur magnet corrosion since they do not communicate to the magnet exterior. By minimizing shrinkage during sintering in this way, a ring or plate-shaped thin wall anisotropic magnet can be prepared without machining for shape correction, achieving a cost reduction and a productivity improvement. Since a high density compact has a high deflective strength, it is easy to handle, minimizing cracking and chipping between the compacting and sintering steps.
摘要翻译： 在制造Nd2Fe14B系稀土烧结磁体时，以预定的比例在磁体中形成封闭的空隙，以使收缩率最小化。 与常规半烧结磁体中的开放空隙或孔不同，封闭的空隙不会引起磁体腐蚀，因为它们不与磁体外部连通。 通过以这种方式使烧结期间的收缩最小化，可以在不进行形状校正的机械加工的情况下制备环形或板状的薄壁各向异性磁体，从而实现成本降低和生产率提高。 由于高密度压块具有高的偏转强度，因此易于处理，使压实和烧结步骤之间的裂纹和碎裂最小化。
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公开(公告)号：US06833036B2
公开(公告)日：2004-12-21
申请号：US10185767
申请日：2002-06-27
申请人： Makoto Nakane , Eiji Kato , Chikara Ishizaka , Akira Fukuno
发明人： Makoto Nakane , Eiji Kato , Chikara Ishizaka , Akira Fukuno
IPC分类号： H01F1057
CPC分类号： H01F1/057 , H01F1/0577
摘要： A rare earth permanent magnet consists of 20-40 wt % of at least one rare earth element R, 0.5-4.5 wt % of boron B, 0.03-0.5 wt % of M (at least one of Al, Cu, Sn and Ga), 0.01-0.2 wt % of Bi, and the balance being at least one transition metal element T.
摘要翻译： 稀土永磁体基本上由20-40重量％的至少一种稀土元素R，0.5-4.5重量％的硼B，0.03-0.5重量％的M（Al，Cu，Sn和Ga中的至少一种）组成 ），0.01-0.2重量％的Bi，余量为至少一种过渡金属元素T.
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公开(公告)号：US5916376A
公开(公告)日：1999-06-29
申请号：US984945
申请日：1997-12-04
CPC分类号： H01F1/059
摘要： An object of the invention is to provide an inexpensive magnet having a high coercivity, high squareness ratio and high maximum energy product. According to the invention, a magnet containing R, T, N, and M wherein R is at least one rare earth element with essential samarium, T is iron or iron and cobalt, and M is at least one element of Ti, V, Cr, Nb, Hf, Ta, Mo, W, Al, C, and P, with essential zirconium, in amounts of 4-8 at % of R, 10-20 at % of N, 2-10 at % of M, and having a hard magnetic phase (TbCu.sub.7 type crystalline phase) and a soft magnetic phase (which is a bcc structured T phase, has an average grain diameter of 5-60 nm, and accounts for 10 to 60% by volume of the entirety), the atomic ratio (R+M)/(R+T+M) in the hard magnetic phase being in excess of 12.5%, is prepared utilizing a single roll technique. In the single roll technique, the peripheral speed of a chill roll is at least 50 m/s, and the discharge pressure of the molten alloy is 0.3-2 kgf/cm.sup.2. Following quenching, the quenched alloy is subjected to heat treatment at 600-800.degree. C. and then to nitriding treatment.
摘要翻译： 本发明的目的是提供一种具有高矫顽力，高矩形比和高最大能量积的廉价磁铁。 根据本发明，含有R，T，N和M的磁体，其中R是至少一种具有必需钐的稀土元素，T是铁或铁和钴，M是Ti，V，Cr中的至少一种元素 ，Nb，Hf，Ta，Mo，W，Al，C和P与必需的锆，其量为R的4-8原子％，N为10-20at％，M为2-10at％，以及 具有硬磁相（TbCu7型结晶相）和软磁相（其为bcc结构的T相，平均粒径为5-60nm，占全体的10〜60体积％）， 使用单辊技术制备硬磁相中的原子比（R + M）/（R + T + M）超过12.5％。 在单辊技术中，冷却辊的圆周速度为至少50m / s，熔融合金的排出压力为0.3-2kgf / cm 2。 淬火后淬火合金在600-800℃进行热处理，然后进行氮化处理。
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