摘要:
This invention provides a soft magnetic yoke-integrated bonded magnet in which a soft magnetic yoke has been integrally compression molded in such a state that the soft magnetic yoke is engaged in a joined face formed by bringing a binding material-containing magnetic powder into contact with a binding material-containing soft magnetic powder. The soft magnetic yoke part and the bonded magnetic part are constructed so that, when the soft magnetic yoke part and the bonded magnet part are compression molded separately from each other, the spring back level is identical upon the release of the compression force.
摘要:
This invention provides a soft magnetic yoke-integrated bonded magnet in which a soft magnetic yoke has been integrally compression molded in such a state that the soft magnetic yoke is engaged in a joined face formed by bringing a binding material-containing magnetic powder into contact with a binding material-containing soft magnetic powder. The soft magnetic yoke part and the bonded magnetic part are constructed so that, when the soft magnetic yoke part and the bonded magnet part are compression molded separately from each other, the spring back level is identical upon the release of the compression force.
摘要:
A rotor comprising bonded magnet portions mainly composed of magnet powder and a binder, which are embedded in a soft magnetic portion mainly composed of soft magnetic powder and a binder, the rotor being produced by a compression-molding method, and the magnetic pole surfaces of the bonded magnet portions being embedded in the soft magnetic portion.
摘要:
A rotor comprising bonded magnet portions mainly composed of magnet powder and a binder, which are embedded in a soft magnetic portion mainly composed of soft magnetic powder and a binder, the rotor being produced by a compression-molding method, and the magnetic pole surfaces of the bonded magnet portions being embedded in the soft magnetic portion.
摘要:
An armature core includes a core portion formed of a lamination of plural non-crystalline metallic foil bands, wherein the armature core is provided with at least two cut surfaces with respect to the lamination layers. Amorphous metal is used as the iron base of the non-crystalline metallic foil bands. The cut surfaces are perpendicular to the lamination layers of the non-crystalline foil bands. Still further, the stator includes a stator core holding member in a disc form, the stator having a plurality of holes or recessions that are substantially in the same shape as a cross-sectional shape of the stator cores and wherein the stator cores are inserted in the holes or recessions of the stator core holding member and held by fixing in vicinities of respective central portions thereof, the central portions being with respect to the axial direction thereof.
摘要:
A permanent magnet having superior resistance to radioactive deterioration of magnetic properties. The magnet has a composition represented by the formula R.sub.a Fe.sub.bal. Co.sub.b B.sub.c Ga.sub. M.sub.e, in which the R denotes at least one element selected from the group consisting of Nd, Pr, Dy, Tb, Ho, and Ce, and the M denotes at least one element selected from the group consisting of Al, Si, Nb, Ta, Ti, Zr, Hf, and W, with the proviso that 12.ltoreq.a.ltoreq.18, 0.ltoreq.b.ltoreq.30, 4.ltoreq.c.ltoreq.10, 0.01.ltoreq.d.ltoreq.3 and 0.ltoreq.e.ltoreq.2 in terms of atomic percent. The permanent magnet has fine crystal grains provided with magnetic anisotropy.
摘要翻译:具有优异的磁性能的放射性劣化的永磁体。 磁体具有由式RaFebal.CobBcGaMe表示的组成,其中R表示选自Nd,Pr,Dy,Tb,Ho和Ce中的至少一种元素,M表示选自至少一种元素 从由Al,Si,Nb,Ta,Ti,Zr,Hf和W组成的组中,条件是12 <= a <= 18,0 <= b <= 30,4 <= c < 0.01 <= d <= 3,0 <= e <= 2。 永磁体具有提供磁各向异性的细晶粒。
摘要:
A mold for producing an anisotropic magnet from a composition essentially consisting of magnetic powder and a binder, a mold body, a cavity for molding the composition in the presence of an anisotropically oriented magnetic field produced by a plurality of first magnets for providing magnetic fluxes for the magnetic field in the cavity, yokes, each provided between the cavity and the first magnets, and second magnets provided on both circumferential sides of the yokes for preventing the leakage of the magnetic fluxes. The first and second magnets are made of permanent magnets such as rare earth cobalt magnets. The mold may be provided at both ends with third magnets for preventing the axial leakage of the magnetic flux from the axial ends of the yokes. Two or more molds may be combined in a single molding apparatus while sharing the first magnets. This mold is suitable for the injection, extrusion or insert molding of bonded magnet rolls, motor rotors, etc.
摘要:
Disclosed is a Nd-Fe-B system magnet having coercive force iHc of 12 KOe or more and high maximum energy product (BH)max of 42 MGOe or more.The permanent magnet consists of 28 to 32 wt. % of Nd and Dy (Dy ranges from 0.4 to 3 wt. %), 6 wt. % or less of Co, 0.5 wt. % or less of Al, 0.9 to 1.3 wt. % of B, at least one of 0.05 to 2.0 wt. % of Nb and 0.05 to 2.0 wt. % of V, 0.02 to 0.5 wt. % of Ga, Fe and unavoidable impurities, having coercive force iHc of 12 KOe or more and maximum energy product (BH)max of 42 MGOe or more.
摘要:
A magnetically anisotropic R-T-B magnet having crystal grains having aspect ratios of 2 or more and showing a substantially uniform maximum energy product distribution is produced by (a) rapidly quenching an alloy melt; (b) finely pulverizing the rapidly quenched alloy to provide magnetic powder; (c) mixing the magnetic powder with a carbon-containing additive; (d) coating the resulting mixture with a protective layer of a first lubricant such as BN substantially unreactive with the alloy components; (e) compressing it; (f) further coating the resulting compressed body with a second lubricant such as graphite or graphite+glass; and (g) further compressing it.
摘要:
A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.