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公开(公告)号：US06942741B2
公开(公告)日：2005-09-13
申请号：US10213099
申请日：2002-08-07
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。
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公开(公告)号：US06547889B2
公开(公告)日：2003-04-15
申请号：US09945710
申请日：2001-09-05
IPC分类号： H01F1147
CPC分类号： G11B33/121 , G11B25/043 , G11B33/14 , Y10T428/32
摘要： The invention discloses an iron-based alloy sheet as a material for preparing a magnetic yoke member to build up a magnetic circuit in a hard-disk voice-coil motor as well as a magnetic yoke member made from such a sheet material. With an object to improve the magnetic circuit in respect of compactness and flatness, the iron-based alloy forming the sheet material contains inherent side elements including C, Si, Mn, P, S, Al, O and N each in a specified amount and is characterized by specified values of saturated magnetic flux density, maximum magnetic permeability and coercive force. The iron-based alloy may further contain up to 10% by weight of cobalt and/or one or a combination of adjuvant elements selected from Ti, Zr, Nb, Mo, Cr, V, Ni, W, Ta and B.
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公开(公告)号：US07488393B2
公开(公告)日：2009-02-10
申请号：US11340498
申请日：2006-01-27
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。
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公开(公告)号：US20090224613A1
公开(公告)日：2009-09-10
申请号：US10584768
申请日：2005-04-26
IPC分类号： H02K41/035
CPC分类号： H01F1/14708 , H01F7/081 , H02K1/17 , H02K41/0358
摘要： Provided are a magnetic circuit capable of being manufactured inexpensively due to omission of formation of a corrosion-resistant metallic surface film as well as a voice coil motor or an actuator by utilizing the same. The magnetic circuit comprises yoke members prepared from a plate material of 0.1 mm to 5 mm thickness of a martensite-type, ferrite-type or precipitation-hardening stainless steel material or a Cr-based heat-resistant steel material containing 0.0001-1% (% by mass, the same hereinbelow) of C, 0.0001-5% of Si, 0.001-2% of Mn, 0.0001-0.1% of P, 0.0001-0.2% of S, 0.0001-5% of Al, 0.0001-0.1% of O, 0.0001-0.1% of N, 0.0001-1% of Ni and 10.5-30% of Cr together with at least one alloying element selected from Ti, Co, Cu, Zr, Nb, V, Mo, W, Ta and B as the additive elements in a total amount of 0.0001-5%, the balance being Fe.
摘要翻译： 提供一种由于省略了形成耐蚀金属表面膜以及通过利用它的音圈电动机或致动器而能够廉价地制造的磁路。 磁路包括由厚度为0.1mm至5mm的马氏体型，铁素体型或沉淀硬化不锈钢材料的板材或含有0.0001-1％的Cr类耐热钢材料制成的轭部件 质量％，下同）C：0.0001-5％Si，0.001-2％Mn，0.0001-0.1％P，0.0001-0.2％S，0.0001-5％Al，0.0001-0.1％ 的O，0.0001-0.1％的N，0.0001-1％的Ni和10.5-30％的Cr以及至少一种选自Ti，Co，Cu，Zr，Nb，V，Mo，W，Ta和 B作为添加元素，总量为0.0001-5％，余量为Fe。
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公开(公告)号：US20060213583A1
公开(公告)日：2006-09-28
申请号：US11340498
申请日：2006-01-27
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： 稀土永磁体是具有组成R 1的烧结磁体的形式，其中R 1，R 2，R 2， 其中F和R（R）其中F和R 分散使得它们的浓度从中心向磁体的表面的平均值增加，R 2的浓度（R 1> 1 / 包含在（R 1，R 2，R 2）2）的主相晶粒周围的晶界中所含的（SUP + + R 2） 烧结磁体中的四方晶系平均高于R 2 O 2的浓度（R 1→R 2 + SUP> 2），并且（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处 其从磁体表面延伸至至少20μm的深度。 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。
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公开(公告)号：US20060213582A1
公开(公告)日：2006-09-28
申请号：US11340496
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein 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, R2 is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, 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, and the magnet body includes a surface layer having a higher coercive force than in the interior. The invention provides permanent magnets having improved heat resistance.
摘要翻译： 功能梯度稀土永磁体是烧结磁体的形式，具有组成R 1，B 2，B 2，B 2， 其中，在本发明的另一个实施方案中， 包含在（R 1）的主相晶粒周围的晶界中的R 2 O 2的浓度（R 1→R 2） 烧结磁体中的四方晶系平均高于R
2 /（R 1→R 2 + 2）是分布的，使得其浓度 从中心向磁体的表面平均增加，（R 1，R 2，R 2）的氟氧化物存在于晶界区域的晶界处， 从磁体表面延伸到至少20μm的深度，并且磁体包括具有较高矫顽力的表面层 比在室内。 本发明提供了具有改善的耐热性的永磁体。 -
公开(公告)号：US07488394B2
公开(公告)日：2009-02-10
申请号：US11340502
申请日：2006-01-27
CPC分类号： C22C38/005 , H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
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, and grain boundaries having a concentration of R2/(R1+R2) which is on the average higher than the concentration of R2/(R1+R2) contained in primary phase grains of (R1,R2)2T14A tetragonal system form a three-dimensional network structure which is continuous from the magnet body surface to a depth of at least 10 μm. The invention provides R—Fe—B sintered magnets which exhibit a high coercive force.
摘要翻译： 稀土永久磁铁是具有组成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，并且具有浓度为 平均高于（R1，R2）2T14A四方晶系的主相晶粒中R2 /（R1 + R2）的浓度的R2 /（R1 + R2）的R2 /（R1 + R2）形成三维网状结构，该三维网状结构从 磁体表面深度至少为10um。 本发明提供了表现出高矫顽力的R-Fe-B烧结磁体。
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公开(公告)号：US06623541B2
公开(公告)日：2003-09-23
申请号：US09916255
申请日：2001-07-30
IPC分类号： C22C2912
CPC分类号： H01F1/0557 , Y10S428/90
摘要： A sintered rare earth magnet consisting essentially of 20-30% by weight of R (wherein R is Sm or a mixture of Sm and another rare earth element), 10-45% by weight of Fe, 1-10% by weight of Cu, 0.5-5% by weight of Zr, and the balance of Co has on its surface a composite layer containing Sm2O3 and/or CoFe2O4 in Co or Co and Fe. The magnet is resistant to hydrogen embrittlement.
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公开(公告)号：US20060213585A1
公开(公告)日：2006-09-28
申请号：US11340521
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet having a reduced eddy current loss in the form of a sintered magnet body having a composition RaEbTcAdFeOfMg is obtained by causing E and fluorine atoms to be absorbed in a R—Fe—B sintered magnet body from its surface. F is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the concentration of E/(R+E) contained in grain boundaries surrounding primary phase grains of (R,E)2T14A tetragonal system is on the average higher than the concentration of E/(R+E) contained in the primary phase grains, the oxyfluoride of (R,E) 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, particles of the oxyfluoride having an equivalent circle diameter of at least 1 μm are distributed in the grain boundary region at a population of at least 2,000 particles/mm2, the oxyfluoride is present in an area fraction of at least 1%. The magnet body includes a surface layer having a higher electric resistance than in the interior. In the permanent magnet, the generation of eddy current within a magnetic circuit is restrained.
摘要翻译： 功能梯度稀土永磁体，其具有呈烧结磁体形式的具有减小的涡流损耗的组合物，其具有组成R a a B B C C 通过使E和氟原子被吸收在...中而获得。 R-Fe-B烧结磁体从其表面。 F的分布使得其浓度从磁体的中心向表面平均增加，包含在（R，E）2的主相晶粒周围的晶界中的E /（R + E）浓度 四方晶系平均高于主相晶粒中所含的E /（R + E）浓度，（R，E）的氟氧化物存在于 在从磁体表面延伸至至少20μm的深度的晶界区域中的晶界，具有至少1um的当量圆直径的氟氧化物颗粒至少分布在晶界区域 2,000颗粒/ mm 2，氟氧化物以至少1％的面积分数存在。 磁体包括具有比内部更高的电阻的表面层。 在永磁体中，抑制了磁路内的涡电流的产生。
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公开(公告)号：US07520941B2
公开(公告)日：2009-04-21
申请号：US11340496
申请日：2006-01-27
CPC分类号： H01F1/0577 , H01F1/058 , H01F41/0266 , H01F41/0293
摘要： A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein 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, R2 is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, 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, and the magnet body includes a surface layer having a higher coercive force than in the interior. The invention provides permanent magnets having improved heat resistance.
摘要翻译： 功能梯度稀土永磁体是具有组成R1aR2bTcAdFeOfMg的烧结磁体的形式，其中包含在（R1，R2）2T14A四方晶系的主晶相周围的晶界中的R2 /（R1 + R2）的浓度在 烧结磁体平均高于主晶粒中所含的R2 /（R1 + R2）的浓度，R2分布成使得其浓度从中心向磁体的平均值增加，氟氧化物 （R1，R2）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，并且磁体包括具有比内部更高的矫顽力的表面层。 本发明提供了具有改善的耐热性的永磁体。
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