Abstract: A method of making an alloy powder for an R—Fe—B-type rare earth magnet includes the steps of preparing a material alloy that is to be used for forming the R—Fe—B-type rare earth magnet and that has a chilled structure that constitutes about 2 volume percent to about 20 volume percent of the material alloy, coarsely pulverizing the material alloy for the R—Fe—B-type rare earth magnet by utilizing a hydrogen occlusion phenomenon to obtain a coarsely pulverized powder, finely pulverizing the coarsely pulverized powder and removing at least some of fine powder particles having particle sizes of about 1.0 ?m or less from the finely pulverized powder, thereby reducing the volume fraction of the fine powder particles with the particle sizes of about 1.0 ?m or less, and covering the surface of remaining ones of the powder particles with a lubricant after the step of removing has been performed.

Abstract: The present invention provides a rare-earth sintered magnet exhibiting desirable magnetic properties in which the amount of Nd and/or Pr forming a non-magnetic phase in a grain boundary phase is reduced. Specifically, the present invention provides a rare-earth sintered magnet having a composition of (R1x+R2y)T100-x-y-zQz where R1 is at least one element selected from the group consisting of all rare-earth elements excluding La (lanthanum), Y (yttrium) and Sc (scandium); R2 is at least one element selected from the group consisting of La, Y and Sc; T is at least one element selected from the group consisting of all transition elements; Q is at least one element selected from the group consisting of B and C, and including, as a main phase, a crystal grain of an Nd2Fe14B crystalline structure, wherein: molar fractions x, y and z satisfy 8?x?18 at %, 0.1?y?3.

Abstract: A method for producing rare earth sintered magnets includes the steps of pressing and compacting an alloy powder for the rare earth sintered magnets, thereby preparing a plurality of green compacts, arranging the green compacts on a receiving plane in a direction in which a projection area of each of the green compacts onto the receiving plane is not maximized, and heating the green compacts, thereby sintering the green compacts and obtaining a plurality of sintered bodies.

Abstract: A rare-earth-iron-boron based alloy powder, in which a heavy rare-earth element such as Dy is present at a higher concentration in a main phase than in a grain boundary phase and which can be sintered easily, and a method of making such an alloy powder are provided. A rare-earth-iron-boron based magnet alloy according to the present invention includes, as a main phase, a plurality of R2Fe14B type crystals (where R is at least one element selected from the group consisting of the rare-earth elements and yttrium) in which rare-earth-rich phases are dispersed. The main phase includes Dy and/or Tb at a higher concentration than a grain boundary phase does.

Abstract: A replication system rapidly switches from a normal-system site to a standby-system site in the event of a problem and reliably maintains functions, and moreover, reduces drops in performance. A first site provides system functions that accompany writing and reading of data. A relay transfer device receives update information from the first site, causes completion of processes for replication in the first site, and continuously executes processes for successively transferring the update information to a second site. The second site receives the update information of the first site and applies this update information to itself to retain a replica of the data of the first site. If, when executing a write request command or a read request command to provide at least a portion of the system functions, the second site has not yet retained the most recent data that are the target of the command, the second site acquires the necessary update information and then executes the command.

Abstract: A sinker electric discharge machine jump control device for reciprocating a tool electrode along a Z-axis with respect to a workpiece using a servo motor in order to expel contaminated fluid from a work gap. The jump control device includes a commanded current generator, the current generator generating a commanded current for the servo motor, and a commanded velocity generator, the velocity generator dividing a locus of a jump stroke into a plurality of segments and generating a commanded velocity for each of the plurality of segments. Additionally, the jump control device includes a velocity override calculator, the calculator generating a velocity override according to the commanded current, and a commanded velocity modifying device, the modifying device modifying the commanded velocity according to the velocity override during the jump stroke.

Abstract: A rare-earth sintered magnet with excellent corrosion resistance and sinterability and a method for producing such a magnet are provided. The rare-earth sintered magnet includes an R2T14Q type tetragonal compound (where R is at least one rare-earth element, T is at least one transition metal element always including Fe, and Q is boron and/or carbon) as a main phase and a grain boundary phase surrounding the main phase. The R2T14Q type tetragonal compound as the main phase includes Cr, which substitutes for a portion of Fe, and carbon, which substitutes for a portion of boron, as respective essential elements. The concentration of carbon in the main phase is higher than that of carbon in the grain boundary phase.

Abstract: A rare earth alloy sintered compact includes a main phase represented by (LR1-xHRx)2T14A, where T is Fe with or without non-Fe transition metal element(s); A is boron with or without carbon; LR is a light rare earth element; HR is a heavy rare earth element; and 0<x<1. The sintered compact is produced by preparing multiple types of rare earth alloy materials including respective main phases having different HR mole fractions, mixing the alloy materials so that the sintered compact will include a main phase having an average composition represented by (LR1-xHRx)2T14A, thereby obtaining a mixed powder, and sintering the mixed powder. The alloy materials include first and second rare earth alloy materials represented by (LR1-uHRu)2T14A (where 0?u<x) and (LR1-vHRv)2T14A (where x<v?1) and including a rare earth element R(=LR+HR) at R1 and R2 (at %), respectively. ?R=|R1?R2| is about 20% or less of (R1+R2)/2.

Abstract: An R-T-B based permanent magnet material alloy according to the present invention is an alloy in the shape of a thin plate including R2T14B columnar crystals and R-rich phases (where R is at least one of the rare-earth elements including Y, T is Fe with or without at least one nonferrous transition metal element, and B is boron with or without carbon). In a structure of the alloy as viewed on an arbitrary cross section including a normal to the thin plate, the ratio of the combined area of some of the R-rich phases, which have aspect ratios of 10 or more and the major axes of which define angles of 90±30 degrees with respect to the surface of the thin plate, to the overall area of the R-rich phases included in the alloy is at least 30%.

Abstract: A method of making a magnetically anisotropic magnet powder according to the present invention includes the steps of preparing a master alloy by cooling a rare-earth-iron-boron based molten alloy and subjecting the master alloy to an HDDR process. The step of preparing the master alloy includes the step of forming a solidified alloy layer, including a plurality of R2Fe14B-type crystals (where R is at least one element selected from the group consisting of the rare-earth elements and yttrium) in which rare-earth-rich phases are dispersed, by cooling the molten alloy through contact with a cooling member.

Abstract: Magnetic alloy powder for a permanent magnet contains: R of about 20 mass percent to about 40 mass percent (R is Y, or at least one type of rare earth element); T of about 60 mass percent to about 79 mass percent (T is a transition metal including Fe as a primary component); and Q of about 0.5 mass percent to about 2.0 mass percent (Q is an element including B (boron) and C (carbon)). The magnetic alloy powder is formed by an atomize method, and the shape of particles of the powder is substantially spherical. The magnetic alloy powder includes a compound phase having Nd2Fe14B tetragonal structure as a primary composition phase. A ratio of a content of C to a total content of B and C is about 0.05 to about 0.90.

Abstract: An control apparatus for an industrial machine according to an embodiment of the present invention, comprises: a submodule including a first memory of electrically rewritable nonvolatile type to store an industrial machine control program, the submodule executing the industrial machine control program stored in the first memory to control an industrial machine; a read out drive reading out a data for rewriting the industrial machine control program from a memory module; and a main module including a second memory having a rewrite control program stored therein to rewrite the industrial machine control program, and a third memory having a general control program stored therein to control the submodule, in an ordinary mode the main module executing the general control program stored in the third memory to cause the submodule to execute the industrial machine control program and control the industrial machine, in an program rewrite mode the main module executing the rewrite control program stored in the second m

Abstract: The present invention is a production method of an R-T-B-C rare earth alloy (R is at least one element selected from the group consisting of rare earth elements and yttrium, T is a transition metal including iron as a main component, B is boron, and C is carbon). An R-T-B bonded magnet containing a resin component, or an R-T-B sintered magnet with a resin film formed on the surface thereof is prepared, and a solvent alloy containing a rare earth element R and a transition metal element T is prepared. Thereafter, the R-T-B bonded magnet is molten together with the solvent alloy. In this way, a rare earth alloy can be recovered from a spent bonded magnet or a defective one generated in a production process stage, and a rapidly quenched alloy magnet can be obtained. As a result, magnet powder is recovered from the R-T-B magnet, and the recycling of a magnet including a resin component can be realized.

Abstract: The step of preparing a rapidly solidified alloy by rapidly quenching a melt of an R-T-B-C based rare-earth alloy (where R is at least one of the rare-earth elements including Y, T is a transition metal including iron as its main ingredient, B is boron, and C is carbon) and the step of thermally treating and crystallizing the rapidly solidified alloy are included. The step of thermally treating results in producing a first compound phase with an R2Fe14B type crystal structure and a second compound phase having a diffraction peak at a site with an interplanar spacing d of 0.295 nm to 0.300 nm (i.e., where 2&thgr;=30 degrees). An intensity ratio of the diffraction peak of the second compound phase to that of R2Fe14B type crystals representing a (410) plane is at least 10%. The present invention provides an R-T-B-C based rare-earth alloy magnetic material, including carbon (C) as an indispensable element but exhibiting excellent magnetic properties, and makes it possible to recycle rare-earth magnets.

Abstract: In a rare earth magnet, an added heavy rare earth element RH such as Dy is effectively used without any waste, so as to effectively improve the coercive force. First, a molten alloy of a material alloy for an R-T-Q rare earth magnet (R is a rare earth element, T is a transition metal element, and Q is at least one element selected from the group consisting of B, C, N, Al, Si, and P), the rare earth element R containing at least one kind of element RL selected from the group consisting of Nd and Pr and at least one kind of element RH selected from the group consisting of Dy Tb, and Ho is prepared. The molten alloy is quenched, so as to produce a solidified alloy. Thereafter, a thermal treatment in which the rapidly solidified alloy is held in a temperature range of 400° C. or higher and lower than 800° C. for a period of not shorter than 5 minutes nor longer than 12 hours is performed.

Abstract: The method for producing a granulated powder of the present invention includes the steps of: preparing an R—Fe—B alloy powder; and granulating the alloy powder using at least one kind of granulating agent selected from normal paraffins, isoparaffins and depolymerized oligomers, to prepare a granulated powder. The produced R—Fe—B alloy granulated powder is excellent in flowability and compactibility as well as in binder removability.

Abstract: A blended powder including a first powder containing an R2T14B phase as a main phase, and a second powder containing an R2T17 phase at 25 wt % or more of the whole is prepared. Herein, R is at least one element selected from the group consisting of all rare-earth elements and Y (yttrium), T is at least one element selected from the group consisting of all transition elements, and Q is at least one element selected from the group consisting of B (boron) and C (carbon). The blended powder is sintered, so as to manufacture a permanent magnet having a structure in which a rare-earth element included in the second powder is concentrated in a grain surgace region of a main phase.

Abstract: A method of making an alloy powder for an R—Fe—B—type rare earth magnet includes the steps of preparing a material alloy that is to be used for forming the R—Fe—B—type rare earth magnet and that has a chilled structure that constitutes about 2 volume percent to about 20 volume percent of the material alloy, coarsely pulverizing the material alloy for the R—Fe—B—type rare earth magnet by utilizing a hydrogen occlusion phenomenon to obtain a coarsely pulverized powder, finely pulverizing the coarsely pulverized powder and removing at least some of fine powder particles having particle sizes of about 1.0 &mgr;m or less from the finely pulverized powder, thereby reducing the volume fraction of the fine powder particles with the particle sizes of about 1.0 &mgr;m or less, and covering the surface of remaining ones of the powder particles with a lubricant after the step of removing has been performed.

Abstract: A relaying device for relaying data transferred from first storage unit to a second storage unit, is provided outside a range presumed to be affected by a disaster, when a disaster, such as an earthquake, has broken out in an installation site of a host of a normal system (host computer) and the first storage unit. Moreover, the relaying device is placed at such a location that the data transfer time between the first storage unit and the relaying device is shorter than the data transfer time in case the first and second storage units directly transfer data with each other. On receipt of data from the first storage unit, the relaying device notifies the first storage unit of the completion of reception of the data before completing transmission of the data to the second storage unit.

Abstract: A method of making an alloy powder for an R—Fe—B-type rare earth magnet includes the steps of preparing a material alloy that is to be used for forming the R—Fe—B-type rare earth magnet and that has a chilled structure that constitutes about 2 volume percent to about 20 volume percent of the material alloy, coarsely pulverizing the material alloy for the R—Fe—B-type rare earth magnet by utilizing a hydrogen occlusion phenomenon to obtain a coarsely pulverized powder, finely pulverizing the coarsely pulverized powder and removing at least some of fine powder particles having particle sizes of about 1.0 &mgr;m or less from the finely pulverized powder, thereby reducing the volume fraction of the fine powder particles with the particle sizes of about 1.0 &mgr;m or less, and covering the surface of remaining ones of the powder particles with a lubricant after the step of removing has been performed.