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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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7.发明授权Raw material alloy for R-T-B system sintered magnet, R-T-B system sintered magnet and production method thereof 有权R-T-B系烧结磁体原料合金，R-T-B系烧结磁体及其制备方法公开(公告)号：US08157927B2
公开(公告)日：2012-04-17
申请号：US12646593
申请日：2009-12-23
IPC分类号： H01F1/057
CPC分类号： H01F41/0266 , H01F1/057 , H01F1/0577
摘要： It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material alloy more fine and making the size distribution more narrow. The present invention provides a raw material alloy for an R-T-B system sintered magnet containing grains of an R2T14B compound, wherein a P and/or S content is between 100 and 950 ppm. This raw material alloy preferably has a composition comprising 25 to 35% by weight of R, 0.5 to 4% by weight of B, 0.02 to 0.6% of one or both of Al and Cu, 5% by weight or less of Co, and the balance of Fe.
摘要翻译： 本发明的目的是通过使通过带状铸造制备的原料合金的晶体微观结构更均匀地获得高矫顽RTB系烧结磁体，从而使由这种原料合金获得的粉碎粉末更细， 尺寸分布更窄。 本发明提供了含有R2T14B化合物颗粒的R-T-B系烧结磁体的原料合金，其中P和/或S含量为100〜950ppm。 该原料合金优选具有25〜35重量％的R，0.5〜4重量％的B，0.02〜0.6重量％的Al和Cu中的一种或两种，5重量％以下的Co，以及 余铁。
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8.发明申请RAW MATERIAL ALLOY FOR R-T-B SYSTEM SINTERED MAGNET, R-T-B SYSTEM SINTERED MAGNET AND PRODUCTION METHOD THEREOF 有权用于R-T-B系统烧结磁体的原材料合金，R-T-B系统烧结磁体及其生产方法公开(公告)号：US20100111746A1
公开(公告)日：2010-05-06
申请号：US12646593
申请日：2009-12-23
CPC分类号： H01F41/0266 , H01F1/057 , H01F1/0577
摘要： It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material alloy more fine and making the size distribution more narrow. The present invention provides a raw material alloy for an R-T-B system sintered magnet containing grains of an R2T14B compound, wherein a P and/or S content is between 100 and 950 ppm. This raw material alloy preferably has a composition comprising 25 to 35% by weight of R, 0.5 to 4% by weight of B, 0.02 to 0.6% of one or both of Al and Cu, 5% by weight or less of Co, and the balance of Fe.
摘要翻译： 本发明的目的是通过使通过带状铸造制备的原料合金的晶体微观结构更均匀地获得高矫顽RTB系烧结磁体，从而使由这种原料合金获得的粉碎粉末更细， 尺寸分布更窄。 本发明提供了含有R2T14B化合物颗粒的R-T-B系烧结磁体的原料合金，其中P和/或S含量为100〜950ppm。 该原料合金优选具有25〜35重量％的R，0.5〜4重量％的B，0.02〜0.6重量％的Al和Cu中的一种或两种，5重量％以下的Co，以及 余铁。
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9.发明授权Method for compacting magnetic powder in magnetic field, and method for producing rare-earth sintered magnet 有权磁场中磁粉的压实方法，稀土类烧结磁体的制造方法公开(公告)号：US07416613B2
公开(公告)日：2008-08-26
申请号：US11040494
申请日：2005-01-21
CPC分类号： H01F1/0536 , H01F1/0577 , H01F41/0273
摘要： A method for compacting a magnetic powder in a magnetic field comprising steps of filling a die with a magnetic powder, applying a pulsed magnetic field to the magnetic powder in the die to orientate the powder, and compressing the magnetic powder, wherein the pulsed magnetic field is applied twice or more when density ρ of a compacted body of said magnetic powder satisfies the relationship ρ=α×H0.5+β(α=0.63 and β=1 to 2), where H is intensity (T) of the applied magnetic field.
摘要翻译： 一种用于在磁场中压制磁粉的方法，包括以下步骤：用磁粉填充模具，将脉冲磁场施加到模具中的磁粉以使粉末定向并压缩磁粉，其中脉冲磁场 施加两次或更多次，所述磁粉的压实体的密度rho满足关系rho = alphaxH0.5 +β（α= 0.63和β= 1至2），其中H是强度（T ）所施加的磁场。
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公开(公告)号：US07740716B2
公开(公告)日：2010-06-22
申请号：US11576050
申请日：2005-11-17
CPC分类号： H01F41/026 , C22C38/005 , H01F1/0577 , H01F7/0221 , H01F41/26 , Y10S428/90
摘要： The present invention provides a technique to improve an adhesion strength between a magnet main body and a protective film. The rare earth sintered magnet of the present invention comprises a magnet main body of a sintered body containing a rare earth element and a protective film formed on the magnet main body, wherein the ratio of a 10-point average surface roughness Rz of the magnet main body on which the protective film is formed to a mean grain size D50 in the magnet main body (Rz/D50 ratio) is kept in a range from 0.20 to 10.00, inclusive. This gives the rare earth sintered magnet which is coated with the protective film having a high adhesion strength of 100 N/m or more and exhibits high corrosion resistance.
摘要翻译： 本发明提供一种提高磁体主体与保护膜之间的粘合强度的技术。 本发明的稀土类烧结磁体包括：含有稀土元素的烧结体的磁体主体和形成在磁体主体上的保护膜，其中磁体主体的10点平均表面粗糙度Rz 保持膜形成在磁体主体中的平均粒径D50的主体（Rz / D50比））保持在0.20〜10.00的范围内。 这使得涂覆有高粘合强度为100N / m以上的保护膜的稀土烧结磁体显示出高的耐腐蚀性。
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