公开(公告)号：US07531933B2

公开(公告)日：2009-05-12

申请号：US11846690

申请日：2007-08-29

申请人： Koji Miyata ,  Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

发明人： Koji Miyata ,  Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

IPC分类号： H02K1/27

CPC分类号： H02K1/02 ,  H01F1/0577 ,  H01F41/0293 ,  H02K1/278 ,  H02K15/03 ,  H02K29/03

摘要： In a rotating machine comprising a rotor including a rotor core and a plurality of permanent magnet segments, and a stator including a stator core and windings, the permanent magnet segment is obtained by disposing a powder comprising an R2 oxide, R3 fluoride or R4 oxyfluoride on a sintered magnet body of R1—Fe—B composition, wherein R1 to R4 are rare earth elements, and heat treating the powder-covered magnet body. The permanent magnet segment of a cross-sectional shape which is tapered from the center toward opposed ends has a higher coercive force at the ends than at the center.

摘要翻译： 在包括转子铁心和多个永久磁铁段的转子和包括定子铁心和绕组的定子的旋转机械中，通过将包含R2氧化物，R3氟化物或R4氟氧化物的粉末设置在 R1-Fe-B组合物的烧结磁体，其中R1至R4为稀土元素，并对粉末覆盖的磁体进行热处理。 从中心向相对端逐渐变细的横截面形状的永磁体段在端部具有比中心更高的矫顽力。

公开(公告)号：US20090053091A1

公开(公告)日：2009-02-26

申请号：US11662467

申请日：2006-11-29

申请人： Koji Sato ,  Mitsuo Kitagawa ,  Takehisa Minowa

发明人： Koji Sato ,  Mitsuo Kitagawa ,  Takehisa Minowa

IPC分类号： B22F3/087

CPC分类号： H01F41/028 ,  H01F13/003

摘要： A radially anisotropic magnet is prepared by furnishing a cylindrical magnet-compacting mold comprising a die, a core, and top and bottom punches, packing a magnet powder in the mold cavity, applying a magnetic field across the magnet powder, and forcing the top and bottom punches to compress the magnet powder for compacting the magnet powder by a horizontal magnetic field vertical compacting process. The top punch is divided into segments so that the magnet powder may be partially compressed; in the step of compacting the magnet powder packed in the mold cavity by a horizontal magnetic field vertical compacting process, the magnet powder is partially compressed by the segments of the top punch cooperating with the bottom punch for thereby consolidating the partially compressed zones of magnet powder to a density from 1.1 times the packing density to less than the compact ultimate density; and thereafter, the entire magnet powder in the cavity is compressed under a pressure equal to or greater than that of partial compression by the entire top and bottom punches for finally compacting the magnet powder.

摘要翻译： 通过提供一种圆柱形磁体压实模具来制备径向各向异性磁体，所述圆柱形磁体压实模具包括模具，芯部以及顶部和底部冲头，在模具腔中填充磁体粉末，在磁体粉末上施加磁场，并且迫使顶部和 底部冲头通过水平磁场垂直压实过程压缩磁体粉末以压实磁体粉末。 顶部冲头分为多个部分，使得磁体粉末可以被部分压缩; 在通过水平磁场垂直压实方法压实填充在模具腔中的磁铁粉末的步骤中，磁体粉末被与顶部冲头配合的顶部冲头的部分部分地压缩，从而固结部分压缩的磁体粉末区域 密度从堆积密度的1.1倍到小于紧密的最终密度; 之后，通过整个顶部和底部冲头，在等于或大于部分压缩的压力下，将空腔中的整个磁体粉末压缩，以最终压实磁体粉末。

公开(公告)号：US07488393B2

公开(公告)日：2009-02-10

申请号：US11340498

申请日：2006-01-27

申请人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  B22F2009/041 ,  B22F2009/044 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/0278 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/058 ,  H01F41/0266 ,  H01F41/0293 ,  B22F9/04 ,  B22F2201/02 ,  B22F2202/05 ,  B22F9/023 ,  B22F3/02 ,  B22F3/10

摘要： A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, the concentration of R2/(R1+R2) contained in grain boundaries surrounding primary phase grains of (R1,R2)2T14A tetragonal system within the sintered magnet body is on the average higher than the concentration of R2/(R1+R2) contained in the primary phase grains, and the oxyfluoride of (R1,R2) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm. The invention provides R—Fe—B sintered magnets which exhibit high magnet performance despite minimal amounts of Tb and Dy used.

摘要翻译： 稀土永磁体为具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中F和R2分布成使得它们的浓度从中心向磁体的平均值增加，R2 /（R1 包含在烧结磁体内的（R1，R2）2T14A四方晶系的主相晶粒周围的晶界中的+ R2）平均高于主晶粒中所含的R2 /（R1 + R2）的浓度， （R1，R2）的氟氧化物存在于从磁体表面延伸至至少20μm的深度的晶界区域的晶界处。 本发明提供了尽管使用最少量的Tb和Dy，其表现出高磁性能的R-Fe-B烧结磁体。

公开(公告)号：US20080277028A1

公开(公告)日：2008-11-13

申请号：US12044101

申请日：2008-03-07

申请人： Kazuaki SAKAKI ,  Koji Sato ,  Takahiro Hashimoto ,  Hajime Nakamura ,  Takehisa Minowa

发明人： Kazuaki SAKAKI ,  Koji Sato ,  Takahiro Hashimoto ,  Hajime Nakamura ,  Takehisa Minowa

IPC分类号： H01F1/055

CPC分类号： C22C1/0441 ,  B22F2003/248 ,  B22F2009/041 ,  B22F2998/10 ,  C22C19/007 ,  C22C19/07 ,  H01F1/0557 ,  H01F41/026 ,  H01F41/0266 ,  H01F41/0273 ,  B22F9/04 ,  B22F3/02 ,  B22F3/10 ,  B22F3/24

摘要： A rare-earth alloy ingot is produced by melting an alloy composed of 20-30 wt % of a rare-earth constituent which is Sm alone or at least 50 wt % Sm in combination with at least one other rare-earth element, 10-45 wt % of Fe, 1-10 wt % of Cu and 0.5-5 wt % of Zr, with the balance being Co, and quenching the molten alloy in a strip casting process. The strip-cast alloy ingot has a content of 1-200 μm size equiaxed crystal grains of at least 20 vol % and a thickness of 0.05-3 mm. Rare-earth sintered magnets made from such alloys exhibit excellent magnetic properties and can be manufactured under a broad optimal temperature range during sintering and solution treatment.

摘要翻译： 稀土合金锭通过将由20-30重量％的Sm单独或至少50重量％的Sm与至少一种其它稀土元素组合的稀土组分，10重量％ 45重量％的Fe，1-10重量％的Cu和0.5-5重量％的Zr，余量为Co，并在条带铸造工艺中淬火熔融合金。 带状铸造合金锭的含量为至少20体积％，厚度为0.05-3毫米的1-200毫米等轴晶粒。 由这种合金制成的稀土烧结磁体显示出优异的磁性能，并且可以在烧结和固溶处理期间在宽的最佳温度范围内制造。

公开(公告)号：US20070160863A1

公开(公告)日：2007-07-12

申请号：US10589360

申请日：2005-06-28

申请人： Ryuji Hamada ,  Takehisa Minowa

发明人： Ryuji Hamada ,  Takehisa Minowa

IPC分类号： H01F1/00 ,  B22F5/00

CPC分类号： H01F41/026 ,  C23C18/04 ,  C23C18/1212 ,  C23C18/122 ,  C23C18/1241 ,  C23C18/1254 ,  C23C18/127 ,  C23C24/08 ,  C23C24/085 ,  C23C26/00 ,  H01F1/0577 ,  H01F1/058 ,  H01F7/02 ,  Y10T428/12014

摘要： A corrosion resistant rare earth magnet is obtained by (i) applying a treating liquid comprising a flaky fine powder and a metal sol to a surface of R—T—M—B rare earth permanent magnet and then heating to form a composite film of flaky fine powder/metal oxide on the magnet surface; (ii) applying a treating liquid comprising a flaky fine powder and a silane and/or a partial hydrolyzate thereof to a surface of R—T—M—B rare earth permanent magnet and then heating a flaky fine powder/silane and/or partially hydrolyzed silane coating to form a composite film on the magnet surface; or (iii) applying a treating liquid comprising a flaky fine powder and an alkali silicate to a surface of R—T—M—B rare earth permanent magnet and then heating to form a composite film of flaky fine powder/alkali silicate glass on the magnet surface.

摘要翻译： 通过（i）将包含片状细粉末和金属溶胶的处理液施加到RTMB稀土永磁体的表面，然后加热形成片状细粉末/金属氧化物复合膜，得到耐腐蚀性稀土磁铁 磁铁表面; （ii）将包含片状细粉末和硅烷和/或其部分水解产物的处理液施加到RTMB稀土永磁体的表面，然后加热片状细粉/硅烷和/或部分水解的硅烷涂层，形成 磁铁表面复合膜; 或者（iii）在R-T-M-B稀土类永久磁铁的表面上涂敷含有薄片状细粉末和碱性硅酸盐的处理液，然后加热，形成片状的细粉末/碱性硅酸盐玻璃的复合膜。

公开(公告)号：US20070125452A1

公开(公告)日：2007-06-07

申请号：US11606088

申请日：2006-11-30

申请人： Koichi Hirota ,  Takehisa Minowa

发明人： Koichi Hirota ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  H01F1/0573 ,  H01F1/058 ,  H01F41/0273 ,  H01F41/0293

摘要： An R-T-B—C rare earth sintered magnet (R═Ce, Pr, Nd, Tb, or Dy; T=Fe) is obtained by mixing an R-T-B—C magnet matrix alloy with an R fluoride and an R-rich R-T-B—C sintering aid alloy, followed by pulverization, compaction and sintering. The sintered structure consists of an R2T14B type crystal primary phase and a grain boundary phase. The grain boundary phase consists essentially of 40-98 vol % of R—O1-x—F1+2x and/or R—Fy, 1-50 vol % of R—O, R—O—C or R—C compound phase, 0.05-10 vol % of R-T phase, 0.05-20 vol % of B-rich phase or M-B2 phase (M=Ti, V, Cr, Zr, Nb, Mo, Hf, Ta or W), and the balance of an R-rich phase.

摘要翻译： 将RTBC稀土烧结磁体（R-Ce，Pr，Nd，Tb或Dy; T = Fe）通过将RTBC磁体基质合金与R氟化物和富R的RTBC烧结助剂合金混合，然后粉碎 ，压实和烧结。 该烧结结构由R 2 S 14 N 14 B型晶体初相和晶界相组成。 晶界相基本上由40-98％（重量）的RO 1-x 1 -F 1 + 2 +和/或RF Y 1， -50体积％的RO，ROC或RC化合物相，0.05-10体积％的RT相，0.05-20体积％的富B相或MB 2相（M = Ti，V， Cr，Zr，Nb，Mo，Hf，Ta或W），余量为富R相。

公开(公告)号：US07211157B2

公开(公告)日：2007-05-01

申请号：US10864427

申请日：2004-06-10

申请人： Kazuaki Sakaki ,  Koji Sato ,  Takahiro Hashimoto ,  Hajime Nakamura ,  Takehisa Minowa

发明人： Kazuaki Sakaki ,  Koji Sato ,  Takahiro Hashimoto ,  Hajime Nakamura ,  Takehisa Minowa

IPC分类号： H01F1/055

CPC分类号： C22C1/0441 ,  B22F2003/248 ,  B22F2009/041 ,  B22F2998/10 ,  C22C19/007 ,  C22C19/07 ,  H01F1/0557 ,  H01F41/026 ,  H01F41/0266 ,  H01F41/0273 ,  B22F9/04 ,  B22F3/02 ,  B22F3/10 ,  B22F3/24

摘要： A rare-earth alloy ingot is produced by melting an alloy composed of 20–30 wt % of a rare-earth constituent which is Sm alone or at least 50 wt % Sm in combination with at least one other rare-earth element, 10–45 wt % of Fe, 1–10 wt % of Cu and 0.5–5 wt % of Zr, with the balance being Co, and quenching the molten alloy in a strip casting process. The strip-cast alloy ingot has a content of 1–200 μm size equiaxed crystal grains of at least 20 vol % and a thickness of 0.05–3 mm. Rare-earth sintered magnets made from such alloys exhibit excellent magnetic properties and can be manufactured under a broad optimal temperature range during sintering and solution treatment.

摘要翻译： 稀土合金锭通过将由20-30重量％的Sm单独或至少50重量％的Sm与至少一种其它稀土元素组合的稀土组分，10重量％ 45重量％的Fe，1-10重量％的Cu和0.5-5重量％的Zr，余量为Co，并在条带铸造工艺中淬火熔融合金。 带状铸造合金锭的含量为至少20体积％，厚度为0.05-3毫米的1-200毫米等轴晶粒。 由这种合金制成的稀土烧结磁体显示出优异的磁性能，并且可以在烧结和固溶处理期间在宽的最佳温度范围内制造。

公开(公告)号：US20070017601A1

公开(公告)日：2007-01-25

申请号：US11489595

申请日：2006-07-20

申请人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

发明人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

IPC分类号： H01F1/03

CPC分类号： H02K1/278 ,  B22F3/24 ,  B22F2003/242 ,  B22F2003/245 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293 ,  H02K15/03 ,  C22C33/0278 ,  B22F3/10 ,  B22F2201/10 ,  B22F2201/20

摘要： A rare earth permanent magnet is prepared from a sintered magnet body of a R1—Fe—B composition wherein R1 is a rare earth element inclusive of Y and Sc, by forming a plurality of slits in a surface of the magnet body, disposing a powder on the magnet body surface, the powder comprising an oxide of R2, a fluoride of R3, or an oxyfluoride of R4 wherein each of R2, R3, and R4 is a rare earth element, and heat treating the magnet body and the powder below the sintering temperature in vacuum or in an inert gas.

摘要翻译： 稀土永磁体由R 1 -Fe-B组合物的烧结磁体制备，其中R 1是含有Y和Sc的稀土元素，由R 1〜 在磁体表面形成多个狭缝，在粉末表面上设置粉末，该粉末包含R 2氧化物，R 3 O 3的氟化物， 或R 4的氟氧化物，其中R 2，R 3和R 4中的每一个是罕见的 并且在真空或惰性气体中将磁体和粉末热处理在烧结温度以下。

公开(公告)号：US07006332B2

公开(公告)日：2006-02-28

申请号：US10345309

申请日：2003-01-16

申请人： Hajime Nakamura ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Takehisa Minowa

IPC分类号： G11B5/56

CPC分类号： G11B5/5552

摘要： A suspension for magnetic head, for supporting a magnetic head slider on which a magnetic head for recording/reproduction of information on a magnetic recording medium is mounted, wherein one end of the suspension is fixed to a stator portion fixed to the tip end of a load beam of the suspension, a gimbal portion and a rotor portion oscillatably supported by metallic micro-beams formed by bending are provided on the side of the other end of the suspension, and the magnetic head slider is attached to the gimbal portion, whereby the rotor portion and the magnetic head slider attached to the gimbal portion as one body with the rotor portion can be oscillated in parallel to the surface of a magnetic recording disk, independently of the driving of the slider by a coarse actuator.

摘要翻译： 一种用于支撑用于支撑磁头滑动器的磁头的悬架，其上安装有用于在磁记录介质上记录/再现信息的磁头，其中悬架的一端固定到固定到磁记录介质的末端的定子部分 在悬架的另一端侧设置悬架的负载梁，由弯曲形成的金属微型梁可摆动地支撑的万向节部分和转子部分，磁头滑块附接到万向节部分，由此， 转子部分和附接到万向节部分的磁头滑块可以与转子部分一体地附接到平行于磁记录盘的表面的振动，而与粗动作器的滑块的驱动无关。

公开(公告)号：US06942741B2

公开(公告)日：2005-09-13

申请号：US10213099

申请日：2002-08-07

申请人： Masanobu Shimao ,  Masaaki Nishino ,  Takehisa Minowa

发明人： Masanobu Shimao ,  Masaaki Nishino ,  Takehisa Minowa

IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/30 ,  C22C38/54 ,  H01F1/147 ,  H01F1/16 ,  H01F3/04 ,  H04R9/00 ,  H01F3/00 ,  H01F3/02

CPC分类号： H01F3/04 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/30 ,  H01F1/14775 ,  H04R9/00

摘要： An iron alloy strip having a gage of 0.1 to 5 mm and a magnetic field strength variation within the strip of 0 to 10 Hz, made of an iron alloy consisting essentially of, in % by weight, 0.0001-0.02% of C, 0.0001-5% of Si, 0.001-0.2% of Mn, 0.0001-0.05% of P, 0.0001-0.05% of S, 0.0001-5% of Al, 0.001-0.1% of O, 0.0001-0.03% of N, 0-10% of Co, 0-10% of Cr, 0.01-5% in total of Ti, Zr, Nb, Mo, V, Ni, W, Ta and/or B, and the balance of Fe, and having a saturation magnetic flux density of 1.7-2.3 Tesla, a maximum relative permeability of 1,200-22,000 and a coercive force of 20-380 A/m is suited for use as yokes in voice coil motor magnetic circuits. The iron alloy strip is highly resistant to corrosion and eliminates a need for a corrosion resistant coating.

摘要翻译： 一种铁合金条，其具有0.1至5mm的量程，并且在0至10Hz的条带内的磁场强度变化由铁合金制成，该铁合金主要由以重量计0.0001-0.02％的C，0.0001-0.02％ 5％的Si，0.001-0.2％的Mn，0.0001-0.05％的P，0.0001-0.05％的S，0.0001-5％的Al，0.001-0.1％的O，0.0001-0.03％的N，0-10 Co的0％，Cr的0〜10％，Ti，Zr，Nb，Mo，V，Ni，W，Ta和/或B的总量为0.01-5％，余量为Fe，并具有饱和磁通量 密度为1.7-2.3特斯拉，最大相对磁导率为1,200-22,000，矫顽力为20-380A / m，适用于音圈电机磁路中的磁轭。 铁合金钢带耐腐蚀性高，不需要耐腐蚀涂层。