公开(公告)号：EP1970916A1

公开(公告)日：2008-09-17

申请号：EP07743651.7

申请日：2007-05-18

申请人： Hitachi Metals, Ltd.

发明人： NISHIUCHI, Takeshi ,  NOZAWA, Noriyuki ,  HIROSAWA, Satoshi ,  MAKI, Tomohito ,  BEKKI, Katsunori

IPC分类号： H01F1/08 ,  H01F1/053 ,  H01F1/06 ,  H01F41/02

CPC分类号： H01F1/057 ,  H01F1/0573 ,  H01F1/0576 ,  H01F1/0578 ,  H01F1/0579 ,  H01F41/028 ,  Y10T428/12153

摘要： An R-Fe-B based porous magnet according to the present invention has an aggregate structure of Nd 2 Fe 14 B type crystalline phases with an average grain size of 0.1 µm to 1 µm. At least a portion of the magnet is porous and has micropores with a major axis of 1 µm to 20 µm.

摘要翻译： 根据本发明的R-Fe-B系多孔磁体具有平均粒径为0.1μm〜1μm的Nd 2 Fe 14 B型结晶相的集合体。 磁体的至少一部分是多孔的并且具有长轴为1μm至20μm的微孔。

公开(公告)号：EP2043114B1

公开(公告)日：2019-01-02

申请号：EP07831943.1

申请日：2007-11-15

申请人： Hitachi Metals, Ltd.

发明人： NOZAWA, Noriyuki ,  NISHIUCHI, Takeshi ,  HIROSAWA, Satoshi ,  MAKI, Tomohito

IPC分类号： H01F1/057 ,  H01F41/02 ,  B22F3/11 ,  C22C38/00 ,  B22F3/24

公开(公告)号：EP1762632B1

公开(公告)日：2011-05-25

申请号：EP06729656.6

申请日：2006-03-22

申请人： Hitachi Metals, Ltd.

发明人： KANEKIYO, Hirokazu ,  HIROSAWA, Satoshi ,  MIYOSHI, Toshio

IPC分类号： H01F1/057 ,  H01F1/058 ,  H01F41/02 ,  C22C38/00 ,  B22D11/06 ,  B22F3/00 ,  B22F9/08 ,  C21D6/00 ,  C22C1/04 ,  C22C19/00 ,  C22C33/02

CPC分类号： B22D11/0611 ,  B22F9/008 ,  B22F2998/00 ,  B22F2998/10 ,  B82Y25/00 ,  C22C1/0441 ,  C22C33/003 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C45/02 ,  H01F1/0578 ,  H01F1/0579 ,  H01F1/058 ,  H01F41/0266 ,  B22F1/0044 ,  B22F9/007 ,  B22F9/04 ,  B22F1/0059 ,  B22F3/02

摘要： An iron-based rare-earth-containing nanocomposite magnet which is an iron-based rare-earth-containing nanocomposite magnet containing an Nd2Fe14B phase and an α-Fe phase and having a composition represented by the empirical formula T100-x-y-z-n(B1-qCq)xRyTizMn (wherein T is at least one transition metal element indispensably including iron and selected from the group consisting of Fe, Co, and Ni; R is at least one rare earth element substantially containing neither La nor Ce; and M is one or more metal elements selected from the group consisting of Al, Si, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au, and Pb), the proportions x, y, z, n, and q satisfying the relationships 4≤x≤10 at.%, 6≤y≤10 at.%, 0.05≤z≤5 at.%, 0≤n≤10 at.%, and 0.05≤q≤0.5, respectively. In the magnet, the content of the α-Fe phase having an average crystal grain diameter of 1-50 nm is 5-60 vol.%, and the content of the Nd2Fe14B phase having an average crystal grain diameter of 5-100 nm is 40-90 vol.%. A nonmagnetic phase containing at least Ti and C (carbon) is present at grain boundaries between the α-Fe phase and the Nd2Fe14B phase.

公开(公告)号：EP1970916B1

公开(公告)日：2015-04-01

申请号：EP07743651.7

申请日：2007-05-18

申请人： Hitachi Metals, Ltd.

发明人： NISHIUCHI, Takeshi ,  NOZAWA, Noriyuki ,  HIROSAWA, Satoshi ,  MAKI, Tomohito ,  BEKKI, Katsunori

IPC分类号： H01F1/08 ,  H01F1/053 ,  H01F1/06 ,  H01F41/02 ,  H01F1/057

CPC分类号： H01F1/057 ,  H01F1/0573 ,  H01F1/0576 ,  H01F1/0578 ,  H01F1/0579 ,  H01F41/028 ,  Y10T428/12153

公开(公告)号：EP2043114A1

公开(公告)日：2009-04-01

申请号：EP07831943.1

申请日：2007-11-15

申请人： Hitachi Metals, Ltd.

发明人： NOZAWA, Noriyuki ,  NISHIUCHI, Takeshi ,  HIROSAWA, Satoshi ,  MAKI, Tomohito

IPC分类号： H01F41/02 ,  B22F1/00 ,  B22F3/00 ,  B22F3/24 ,  B22F3/26 ,  B22F9/04 ,  C22C38/00 ,  H01F1/053 ,  H01F1/08

CPC分类号： H01F41/0273 ,  B22F3/11 ,  B22F2003/248 ,  B22F2998/10 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/0573 ,  H01F1/0576 ,  H01F1/0577 ,  H01F1/0578 ,  H01F41/0293 ,  B22F3/02 ,  B22F3/24

摘要： According to the present invention, an R-Fe-B based rare-earth alloy powder with a mean particle size of less than 20 µm is provided and compacted to make a powder compact. Next, the powder compact is subjected to a heat treatment at a temperature of 550 °C to less than 1,000 °C within hydrogen gas, thereby producing hydrogenation and disproportionation reactions (HD processes). Then, the powder compact is subjected to another heat treatment at a temperature of 550 °C to less than 1,000 °C within either a vacuum or an inert atmosphere, thereby producing desorption and recombination reactions and obtaining a porous material including fine crystal grains, of which the density is 60% to 90% of their true density and which have an average crystal grain size of 0.01 µm to 2 µm (DR processes). Thereafter, the porous material is subjected to yet another heat treatment at a temperature of 750 °C to less than 1,000 °C within either the vacuum or the inert atmosphere, thereby further increasing its density to 93% or more of their true density and making an R-Fe-B based microcrystalline high-density magnet.

摘要翻译： 根据本发明，提供平均粒径小于20μm的R-Fe-B类稀土合金粉末并压实成粉末成形体。 接着，在氢气中，在550℃〜1000℃的温度下对粉体进行热处理，从而进行氢化和歧化反应（HD工序）。 然后，在真空或惰性气氛中，在550〜1000℃的温度下进行另一次热处理，由此进行解吸和复合反应，得到包含微细晶粒的多孔材料 其密度为其真密度的60％至90％，并且其平均晶粒尺寸为0.01μm至2μm（DR工艺）。 此后，在真空或惰性气氛中，在750℃至小于1000℃的温度下对多孔材料进行另外的热处理，从而进一步将其密度增加至其真实密度的93％以上 一种R-Fe-B系微晶高密度磁体。

公开(公告)号：EP1358660B1

公开(公告)日：2008-08-13

申请号：EP02710497.5

申请日：2002-02-04

申请人： Hitachi Metals, Ltd.

发明人： KANEKIYO, Hirokazu ,  HIROSAWA, Satoshi

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： B82Y25/00 ,  B22D11/0611 ,  C22C1/0441 ,  C22C38/002 ,  C22C38/005 ,  H01F1/0571 ,  H01F1/0578 ,  H01F1/0579 ,  H01F1/058

摘要： A melt of an iron-based rare earth material alloy, represented by (Fe?1-m#191T?m#191)?100-x-y-z#191Q?x#191R?y#191M?z#191, is prepared. T is Co and/or Ni; Q is B and/or C; R is selected from Y (yttrium) and the rare earth elements; M is selected from Al, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb; 10≤x≤30 at%; 2%≤y