CN201942737U - Device for producing R-T-B series rare earth alloy - Google Patents
Device for producing R-T-B series rare earth alloy Download PDFInfo
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- CN201942737U CN201942737U CN2010206982754U CN201020698275U CN201942737U CN 201942737 U CN201942737 U CN 201942737U CN 2010206982754 U CN2010206982754 U CN 2010206982754U CN 201020698275 U CN201020698275 U CN 201020698275U CN 201942737 U CN201942737 U CN 201942737U
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Abstract
The utility model provides a device for producing R-T-B series rare earth alloy which can improve the cooling efficiency after casting and can be operated stably. The device comprises a casting part for casting the alloy melt by strip casting process and a crushing part for crushing the casting alloy. The casting part comprises a cooling roll which is used for casting alloy melt by quenching the alloy melt using a water cooling mechanism (5) set therein. The water cooling mechanism (5) comprises: an aqueduct (51) for introducing the cooling water, which is coaxial with a roll body (41) and extends from inside of the roll body (41) to outside; several tubular water spraying nozzles (52), which is set around the aqueduct (51) and is parallel to the aqueduct (51), multiple spraying holes (52a) are formed on the water spraying nozzle for spraying the cooling water (W) onto the inner surface of the roll body (41); and a front chamber (57), which is provided between the aqueduct (51) and the nozzle aqueduct (53).
Description
Technical field
The utility model relates to a kind of manufacturing installation that the R-T-B that is adapted at uses such as permanent magnet is a rare earth alloy that is used for making, particularly, relate to a kind of manufacturing installation that can improve the cooling efficiency when casting and can realize the R-T-B based rare earth alloy of stable operation.
Background technology
In the past, even as the magnet that constitutes by the R-T-B based rare earth alloy that in permanent magnet, also has maximum magnetic energy product, because therefore its high characteristic is adapted at using in each field such as HD (hard disk drive), MRI (Magnetic resonance imaging), various electric motor.To can bring into play energy-efficient by the magnet set that this R-T-B based rare earth alloy the constitutes electric motor that rotor forms of packing into.Therefore, because in recent years except requirements of saving energy is improved constantly, the thermotolerance of R-T-B based rare earth alloy also improves, and the usage quantity that causes being applied to the R-T-B based rare earth alloy magnet in the various electric motor of household electrical appliances, air-conditioning, automobile etc. constantly increases.
In general,, therefore be generically and collectively referred to as Nd-Fe-B system or R-T-B based rare earth alloy, after this alloy is shaped and carrying out sintering, by its magnetization just can be accessed magnet because the main component of R-T-B based rare earth alloy is Nd, Fe, B.Here, as a rule, the R in the R-T-B based rare earth alloy is based on the material that will obtain after other rare earth element displacement with Pr, Dy, Tb etc. of the part of Nd, and is to comprise at least a in the rare earth element of Y.And T is the material that the part of Fe is obtained after with other transition element displacement such as Co, Ni.And B is a boron, its part can be replaced with C or N.In addition, also can will be added in the R-T-B based rare earth alloy as a kind of or multiple combination among the Cu, the Al that add element, Ti, V, Cr, Ga, Mn, Nb, Ta, Mo, W, Ca, Sn, Zr, the Hf etc.
The R-T-B based rare earth alloy that constitutes R-T-B based rare earth magnet is a kind of like this alloy, promptly, to help magnetization as the R2T14B of ferromagnetism phase as principal phase, and coexistence have nonmagnetic, rare earth element to concentrate the back and low-melting rich R phase.Because the R-T-B rare earth alloy is a reactive metal, therefore generally in rare gas elementes such as vacuum or argon, fuses, cast.In addition, for the R-T-B rare earth alloy piece after adopting powder metallurgic method by casting is made sintered magnet, usually alloy block need be crushed to about 3 μ m (FSSS: drawing in magnetic field behind the powdered alloy mensuration of using Fisher sub-sieve sizer to carry out), and in sintering oven, carry out sintering with about 1000～1100 ℃ high temperature, then, heat-treat as required, mechanical workout, and carry out coating in order to improve erosion resistance and handle, thereby form sintered magnet (permanent magnet).
In the sintered magnet that is made of R-T-B based rare earth alloy, rich R has following important effect mutually:
1) fusing point is low, is liquid phase during sintering, helps the densification of magnet, therefore helps improving the magnetization degree.
2) eliminate the concavo-convex of crystal boundary, the nucleation site (nucleation site) of anti-magnetic region is reduced, improve coercive force.
3) make the principal phase magnetic insulation, increase coercive force.
Thereby, if the dispersion state of the rich R phase in the magnet after being shaped is poor, can cause then that local sintering is bad, magnetic reduces, therefore to be dispersed in the magnet after the shaping mutually be very important to rich R.In addition, be that the distribution of the rich R phase of sintered magnet has a significant impact as the R-T-B based rare earth alloy organizing of raw material to R-T-B.
And, be that another problem that produces in the casting of alloy is at R-T-B, generating in the alloy after casting has α-Fe.α-Fe has deformability, and it can not pulverized, but remains in the pulverizer, thereby the crush efficiency when pulverizing alloy is reduced, and also can exert an influence to the variation of the composition before and after pulverizing, size-grade distribution.Therefore, in alloy in the past, the processing that at high temperature homogenizes for a long time as required, thus remove α-Fe.But, because α-Fe exists as peritectoid nuclear, needing long solid phase diffusion in order to remove this α-Fe, thickness is that the ingot casting of several cm and rare earth class content are under the situation 33% below, in fact is impossible removal α-Fe.
In order to solve the problem that in the R-T-B rare earth alloy, generates α-Fe, developed a kind of under speed of cooling faster rapid hardening casting (stripcast) method (being also referred to as the SC method) of casting alloy piece, and this method is used in actual operation.This SC method is a kind of like this method, that is, liquation is flowed on through the cooling roller made of copper after the water-cooled and with the thin slice of its casting into about 0.1～1mm in inside, thereby make the alloy quenching solidify (for example, with reference to patent documentation 1).
Patent documentation 1: No. 3449166 communique of Japanese Patent
In recent years, along with the characteristic raising of magnet, people seek the high performance of R-T-B based rare earth alloy, use the demand of the R-T-B based rare earth alloy of SC method casting to improve constantly.
But in SC method in the past, have following problem: textural at its device, owing to be difficult to upper side is supplied with water coolant in cooling roller inside, the roller upper side on the cooling roller surface of rotation can not be brought into play the cooling performance of regulation.Like this, under the situation that the inhomogeneous cooling on cooling roller surface is spared, especially, because the cooling of the liquation of the upper side position of cooling roller is incomplete, cause the generation of the inhibition α-Fe in the alloy liquation of this part to have the limit, thereby be difficult to realize excellent magnetic properties.And the cooling performance deficiency of cooling roller can make the temperature of cooling roller rise, and might make mechanical component damages such as bearing, thereby can not safety operation.In addition, roller main body made of copper is in high temperature and can causes making its lifetime.
Summary of the invention
The present invention makes in view of above problem, and purpose provides a kind of manufacturing installation of R-T-B based rare earth alloy.This manufacturing installation can improve the cooling efficiency when using rapid hardening casting casting alloy, the temperature of inhibition cooling roller rises, prevents the damage of mechanical component, and can prolong the life-span of roller main body made of copper, realizes stable operation.
Contriver of the present utility model has carried out wholwe-hearted research in order to solve above-mentioned problem.Its result, discovery is in the manufacturing installation of the R-T-B based rare earth alloy that adopts the SC method, water-cooled mechanism for the cooling roller inside that is arranged on casting usefulness, rationalization such as the structure of the feedway by making water coolant, spray regime, can be evenly and make cooling roller cooling expeditiously, thus the cooling efficiency can improve casting the time.Thus, can realize preventing the damage of mechanical component and the long lifetime of roller main body made of copper, can carry out stable operation, and then finish the utility model.That is, the utility model adopts following structure:
(1) a kind of manufacturing installation of R-T-B class rare earth alloy, it comprises the casting station that adopts the rapid hardening casting that the alloy liquation is cast at least, and be used for the broken portion of casting alloy fragmentation after the casting, above-mentioned casting station is at least by the cooling roller that is used to cast above-mentioned casting alloy and be provided with in the mode that can rotate, and tundish (tundish) formation that is used for above-mentioned alloy liquation is supplied to this cooling roller surface, above-mentioned cooling roller is made of with the water-cooled mechanism that is located at this roller body interior the roller main body, above-mentioned water-cooled mechanism is by aqueduct, spray nozzle, nozzle ingress pipe and cup constitute, above-mentioned aqueduct is with coaxial with above-mentioned roller main body, and the mode of extending to the outside from above-mentioned roller body interior is provided with, be used for water coolant guide-in roller body interior, above-mentioned spray nozzle is a tubulose, in above-mentioned roller body interior, around above-mentioned aqueduct, be provided with a plurality of these spray nozzles in the mode parallel with this aqueduct, and on this spray nozzle, be formed with a plurality of jet holes that are used for water coolant is injected into above-mentioned roller body inner surface, the water coolant that the said nozzle ingress pipe is used for utilizing above-mentioned aqueduct to be imported into above-mentioned roller body interior imports above-mentioned spray nozzle, and above-mentioned cup is located between above-mentioned ingress pipe and the said nozzle ingress pipe.
Manufacturing installation according to R-T-B based rare earth alloy of the present utility model, in the casting station that adopts the rapid hardening casting that the alloy liquation is cast, for the water-cooled mechanism that is arranged on cooling roller inside, adopt following structure, promptly, this water-cooled mechanism is by aqueduct, spray nozzle, nozzle ingress pipe and cup constitute, above-mentioned aqueduct is with coaxial with the roller main body, and the mode of extending to the outside from the roller body interior is provided with, be used for water coolant guide-in roller body interior, above-mentioned spray nozzle is a tubulose, in the roller body interior, around aqueduct, be provided with a plurality of these spray nozzles in the mode parallel with this aqueduct, and on this spray nozzle, be formed with a plurality of jet holes that are used for water coolant is injected into the roller body inner surface, the water coolant that the said nozzle ingress pipe is used for utilizing aqueduct to be imported into above-mentioned roller body interior imports spray nozzle, and above-mentioned cup is located between ingress pipe and the nozzle ingress pipe.Make R-T-B based rare earth alloy by the manufacturing installation that adopts this structure, can high-level efficiency and equably cooling roller is cooled off, cooling efficiency improves, thereby can realize preventing the damage of mechanical component and make roller main body long lifetime.Therefore, can carry out stable operation, a kind of manufacturing installation of R-T-B based rare earth alloy of productivity excellence can be provided.
Description of drawings
Fig. 1 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, is the in-built diagrammatic illustration figure of manufacturing installation integral body.
Fig. 2 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, is the diagrammatic illustration figure that is provided with the casting station of cooling roller.
Fig. 3 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, is the stereographic map of the structure of cooling roller.
Fig. 4 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, is arranged on the stereographic map of structure of the water-cooled mechanism of cooling roller inside.
Fig. 5 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, (a) of Fig. 5 is the vertical view that is used to describe in detail the structure of the spray nozzle that is arranged at water-cooled mechanism shown in Figure 4, and (b) of Fig. 5 is the side-view of Fig. 5 (a).
Fig. 6 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of an embodiment of the present utility model, is the vertical view of the structure of water-cooled mechanism integral body.
Fig. 7 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of other embodiment of the present utility model, is the diagrammatic illustration figure of groove that is arranged at the internal surface of cooling roller.
Fig. 8 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of other embodiment of the present utility model, is in the mode that roughly is pectination a plurality of roughly in a tubular form diagrammatic illustration figure of structure of spray nozzle to be set.
Fig. 9 is the schematic illustration of manufacturing installation of the R-T-B based rare earth alloy of other embodiment of the present utility model, is the diagrammatic illustration figure of the structure of cylindrical circular spray nozzle roughly.
Embodiment
Below, be elaborated with reference to the manufacturing installation of accompanying drawing to the R-T-B based rare earth alloy of having used an embodiment of the present utility model.In addition, in the accompanying drawing of institute's reference, identical components is marked same reference numerals or omits its Reference numeral in the following description.And the accompanying drawing of reference is a synoptic diagram in the following description, and the length and width wherein and the ratio of thickness etc. are variant with the device of reality sometimes.
(R-T-B based rare earth alloy)
The main component of the R-T-B based rare earth alloy that the manufacturing installation (the following manufacturing installation that only slightly is called) 1 of the R-T-B based rare earth alloy of use present embodiment is made is Nd, Fe, B, to this alloy form processing and carry out sintering after, it is magnetized, thereby can access permanent magnet.
Here, the main component of the R in the R-T-B based rare earth alloy is Nd, its part can be replaced with other rare earth element such as Pr, Dy, Tb.
In addition, the T in the R-T-B based rare earth alloy is with other the material of transition metal displacement back gained such as Co, Ni with the part of Fe.Like this, the T in the above-mentioned general formula also comprises except that Fe under the situation of Co, can improve Tc (Curie temperature), and therefore the T in the preferred above-mentioned general formula also comprises Co.
In addition, the B in the R-T-B based rare earth alloy is a boron, its part can be replaced with C or N.
In addition, the composition ratio of the R among general formula R-T-B is 28～33 quality %, and the composition ratio of B is 0.9～1.3 quality %, and in addition, T is a nubbin.
The manufacturing installation of R-T-B based rare earth alloy
Fig. 1 is that the integrally-built master of the manufacturing installation 1 of present embodiment looks schematic illustration, and, Fig. 2 is the diagrammatic illustration figure of structure that constitutes the casting station 2 of manufacturing installation 1, and Fig. 3～Fig. 6 is respectively the further explanatory drawings that is arranged at the water-cooled mechanism 5 in the casting station 2 shown in Figure 2.
In chamber 10, comprise at least and adopt the casting station 2 that the rapid hardening casting casts casting alloy liquation L and be used for broken portion 3, thereby roughly constitute this manufacturing installation 1 the casting alloy M fragmentation after the casting.Casting station 2 is made of cooling roller 4 and tundish 6 at least, this cooling roller 4 can rotate, its water-cooled mechanism 5 that is arranged at the inside of roller main body 41 by utilization makes alloy liquation L quenching cast casting alloy M, and this tundish 6 is used for alloy liquation L is supplied to the surperficial 41a of this cooling roller 4.And, the water-cooled mechanism 5 that is arranged at roller main body 41 inside is by aqueduct 51, spray nozzle 52, nozzle ingress pipe 53 and cup 57 constitute, above-mentioned aqueduct 51 is with coaxial with roller main body 41, and the mode of extending to the outside from roller main body 41 inside is provided with, be used for water coolant W guide-in roller main body 41 inside, above-mentioned spray nozzle 52 is a tubulose, in roller main body 41 inside, around aqueduct 51, be provided with a plurality of these spray nozzles 52 in the mode parallel with this aqueduct 51, and on this spray nozzle 52, be formed with a plurality of jet hole 52a that are used for water coolant W is injected into the internal surface 41b of roller main body 41, the water coolant W that said nozzle ingress pipe 53 is used for utilizing aqueduct 51 to be imported into roller main body 41 inside imports above-mentioned spray nozzle 52, and above-mentioned cup 57 is located between aqueduct 51 and the nozzle ingress pipe 53.
In addition, the manufacturing installation 1 of example shown in Fig. 1 also is provided with container 8, its be used for casting alloy M broken portion 3 be broken and casting alloy thin slice N store.
The inside of chamber 10 is made the reduced atmosphere of vacuum or rare gas element and is used, and for example can use argon (Ar) gas as rare gas element.
Casting station
Fig. 2 is arranged on the casting station 2 in the manufacturing installation 1 and the schematic illustration of broken portion 3.
Alloy liquation L prepares in the not shown high-frequency melting furnace that is arranged at chamber 10 outsides.In high-frequency melting furnace, in vacuum or inert gas atmosphere, raw material is dropped into fire-clay crucible 61, utilize the high frequency method of fusion to make the raw material fusing of input, thereby prepare alloy liquation L.The temperature of alloy liquation L is different because of the difference of alloying constituent, and this temperature is adjusted in 1200 ℃～1500 ℃ scopes.As shown in Figure 2, the alloy liquation L for preparing like this is transported to casting station 2 together with fire-clay crucible 61, from fire-clay crucible 61 alloy liquation L is supplied to tundish 6 then.
Tundish 6 will be supplied with the surperficial 41a that the alloy liquation L that comes is supplied to the cooling roller 4 that is rotated action successively from fire-clay crucible 61.This tundish 6 and fire-clay crucible 61 are to be made of resistivity against fire and the high material of thermotolerance equally.
As shown in Figure 3, cooling roller 4 roughly is made of roller main body 41 and the water-cooled mechanism 5 that is arranged at the inside of this roller main body 41.And cooling roller 4 makes the alloy liquation L quenching that is supplied to by the surperficial 41a of water-cooled mechanism 5 cooled roller main bodys 41, thus casting casting alloy M.In addition, cooling roller 4 is provided with along the mode of sense of rotation R rotation being the center with its rotation J.
Roller main body 41 constitutes the roller shape of Figure 1 and Figure 2, is to be the roller component that the center is rotated with rotation J.Though the material as such roller main body 41 is not limited especially the good and consideration of acquisition aspect easily from thermal conductivity, preference such as copper or copper alloy.
In addition, according to the material of roller main body 41, the condition of surface of surperficial 41a, therefore easy adhesion metal is provided with clearing apparatus etc. as required on surperficial 41a, thereby makes the quality of the R-T-B based rare earth alloy of casting and getting more stable.
And the target thickness of casting alloy M is correspondingly controlled the relation between the feed speed of the commentaries on classics (rotation) of cooling roller 4 speed and alloy liquation L, and preferably the rotating speed of cooling roller 4 is in the about 0.5～3m/s scope of circumferential speed.
In addition, the casting alloy M after solidifying on the cooling roller 4 breaks away from from cooling roller 4 at a side position opposite with a side that is provided with tundish 6.
Below, in the manufacturing installation 1 of present embodiment, the water-cooled mechanism 5 of the inside that is arranged at the roller main body 41 that constitutes cooling roller 4 is described in detail.
As the (a) and (b) of Fig. 5 (also with reference to Fig. 3,4 and Fig. 6) shown in, water-cooled mechanism 5 roughly comprises aqueduct 51, spray nozzle 52 and nozzle ingress pipe 53.
The aqueduct 51 of present embodiment is the double-sleeve structure that comprises supply-pipe 51A and circulation tube 51B as shown in Figure 6, disposes supply-pipe 51A in circulation tube 51B.Supply with next water coolant W from supply side 55a side inflow supply-pipe 51A from not shown reservoir part.In addition, cup 57 is connected with the other end 55b of supply-pipe 51A, and nozzle ingress pipe 53 described later is connected with this cup 57.Thus, the ingress pipe 51 of present embodiment constitutes following structure, that is, the water coolant W process that is imported into supply-pipe 51A is positioned at the cup 57 of the inside of roller main body 41, is imported into spray nozzle 52 from nozzle ingress pipe 53 described later.
In addition, the included circulation tube 51B of aqueduct 51 be used in order to reclaim water spraying nozzle 52 and to eject cooled water coolant W, and will use after water coolant W be returned to not shown reservoir part and be provided with, this circulation tube 51B constitutes the water coolant W after using is returned to circulate from the other end 56b and holds the 56a side.As shown in Figure 6, circulation tube 51B is connected with return chamber 58 in the other end 56b of roller main body 41 inside side, is being provided with a plurality of return hole 58a that are used for the water coolant W after using is imported its inside on this return chamber 58.And return between chamber 58A, the 58B at this by constituting across the return chamber of cup 57 58A, 58B two Room the return chamber 58 of illustrative example, be provided with communicating pipe 58C in the mode that runs through cup 57, thereby water coolant W can move freely between two Room.
In addition, in the present embodiment, when self-circulation end 56a returns water coolant W after using to not shown reservoir part, before water coolant W after will using is returned to reservoir part, water coolant W after may utilizing not shown cooling-part to this use as required cools off again, perhaps makes water coolant W after this use by being used to strainer of removing impurity etc.
Shown in Fig. 4 waited, spray nozzle 52 was in a tubular form members roughly, is provided with a plurality of these spray nozzles 52 abreast with this aqueduct 51 around aqueduct 51, and this spray nozzle 52 is connected with aqueduct 51 by nozzle aqueduct 53.Be formed with a plurality of jet hole 52a that are used for water coolant W is injected into the internal surface 41b of roller main body 41 on spray nozzle 52, in the example shown in (a) of Fig. 5, a plurality of jet hole 52a are formed on each spray nozzle 52 with forming a line.And, in the present embodiment, supply with the water coolant W that comes from the supply-pipe 51A of aqueduct 51 and utilize ingress pipe 53 to be imported in the spray nozzle 52, spray towards the internal surface 41b of roller main body 41 from each jet hole 52a then.
In addition, show, in the present embodiment, be connected with nozzle ingress pipe 53, constitute and in vertical view, be roughly T font in the length of tube direction substantial middle position of spray nozzle 52 as knowing clearly among Fig. 5.
In the manufacturing installation of in the past use SC method, consider that from structure have following problem, that is, water coolant especially is difficult to flow on the top of cooling roller, thereby the cooling on cooling roller surface becomes inhomogeneous, can not bring into play the cooling performance of regulation.Therefore, in manufacturing installation in the past, the cooling efficiency of the alloy during casting reduces.
In the present embodiment, adopt the structure that water-cooled as described above mechanism 5 is set in the inside of roller main body 41, thus also can be efficiently and equably water coolant W is injected into the internal surface 41b on the top of roller main body 41.Thus, by alloy liquation L casting casting alloy M the time, can obtain uniform cooling performance, cooling efficiency improves, thereby can prevent the damage of mechanical component and make roller main body long lifetime.Therefore, can carry out stable operation, production efficiency improves.
In addition, in the manufacturing installation 1 of present embodiment, adopt the such following structure of example as shown in Figure 6, that is, from the supply-pipe 51A of aqueduct 51 when spray nozzle 52 is supplied with water coolant W via cup 57.
Generally speaking, from supply-pipe water coolant directly is supplied under the situation of spray nozzle, has following problem, promptly, discharge the cooling water pressure increase of (injections) scarce capacity and supply side (not shown reservoir part side), thereby be difficult to guarantee the spray volume stipulated.In the present embodiment, between supply-pipe 51A and nozzle ingress pipe 53, be provided with cup 57, the radial dimension of this cup 57 is bigger than the caliber of supply-pipe 51A, nozzle ingress pipe 53, a plurality of spray nozzles 52 are connected with this cup 57 by nozzle ingress pipe 53, by increasing the path of discharging side, make water coolant become easy from the conveying of supply side (reservoir part side).Thus, the water coolant W of water spraying nozzle 52 (jet hole 52a) ejection is stably sprayed towards the internal surface 41b of roller main body 41, and cooling performance improves.Therefore, with similarly above-mentioned, can prevent the damage of mechanical component and make roller main body long lifetime, thereby can carry out stable operation.
In addition, in the spray nozzle 52 of present embodiment, preferred jet hole 52a towards the angle of inclination that is become with medullary ray T, be that the spray angle θ of water coolant W is the angle that tilts to sense of rotation R, above-mentioned medullary ray T spinning axis J extends via the internal surface 41b of center in the pipe of spray nozzle 52 towards roller main body 41.In addition, the spray angle θ left-hand tools direction R towards being constructed such that water coolant W that is more preferably jet hole 52a tilts in 40 °～80 ° the scope, in example shown in Figure 5, jet hole 52a towards, promptly spray angle θ is about 60 °.
Shown in Fig. 5 (b), the medullary ray T angulation towards extending to the internal surface 41b (with reference to Fig. 3) of roller main body 41 with spinning axis J of jet hole 52a be the angle of inclination (spray angle θ) to 40 °～80 ° of sense of rotation R inclinations, thus, the water coolant W that ejects of blowing perforation 52a also correspondingly changes with spray angle θ with respect to the spray angle of internal surface 41b.
The spray angle that water coolant W is become with the internal surface 41b of roller main body 41 also can be for approximate right angle (spray angle θ=0 °), even such angle also can obtain above-mentioned effect of the present utility model fully.But, contriver of the present utility model is through attentively discovering, shown in Fig. 5 (b), injection direction by making water coolant W is oblique towards the sense of rotation R inclination of roller main body 41, when casting R-T-B based rare earth alloy, the cooling performance of the surperficial 41a of roller main body 41 becomes more even, and cooling efficiency improves, and can suppress the generation of α-Fe significantly.
Generally speaking, in the manufacturing installation that uses the SC method, under the situation of the cooling roller of the structure of employing shower cooling water, form the boundary film of water vapour sometimes at the roller internal surface, thereby cause the property cooled off reduction.
In the present embodiment, as above-mentioned structure, make the jet hole 52a that is located on the spray nozzle 52 towards suitableization, and the spray angle θ of water coolant W is controlled at above-mentioned direction, thereby, even form the boundary film of water vapour at internal surface 41b, also the hydraulic pressure of the water coolant W that can eject by water spraying nozzle 52 is removed boundary film.Thus, can obtain the cooling performance of the surperficial 41a of roller main body 41 more equably, cooling efficiency further improves.Therefore, can prevent the damage of mechanical component and make roller main body long lifetime, can carry out stable operation.
In addition, in the present embodiment, be in the spray nozzle 52 and nozzle ingress pipe 53 of syndeton of T font at as shown in Figure 5 vertical view, the diameter D1 of preferred spray nozzle 52 and connection section 52A nozzle ingress pipe 53 is greater than the diameter D2 of the both ends 52B of spray nozzle 52.Particularly, the diameter D1 of preferred connection section 52A and the ratio of the diameter D2 of both ends 52B are in D1/D2=1.05～1.45 scopes.
Generally speaking, under the situation of the nozzle of use uniform diameter, the existence front end extension water yield to nozzle more is not enough more, equably the problem of shower cooling water.
In the present embodiment, as mentioned above, adopt the structure of the diameter D 1 of connection section 52A, thereby the water coolant W that is imported into spray nozzle 52 from nozzle ingress pipe 53 is along with rising towards mobile its hydraulic pressure of both ends 52B and flow velocity from connection section 52A greater than the diameter D 2 of both ends 52B.Thus, can carry water coolant W to arrive the both ends 52B of spray nozzle 52 equably until this water coolant W, thereby no matter in spray nozzle 52 which position, blowing perforation 52a shower cooling water W equably.In addition, because the hydraulic pressure of the water coolant W that blowing perforation 52a ejects and flow velocity raising, thereby the cooling performance of the internal surface 41b of pair roller main body 41 also improves.Therefore, can obtain the cooling performance of the internal surface 41a of roller main body 41 equably, cooling performance further improves, and can prevent the damage of mechanical component and make roller main body long lifetime, thereby can carry out stable operation.
In addition, under the situation of ratio in above-mentioned scope of the diameter D1 of connection section 52A and the diameter D2 of both ends 52B, can further obtain above-mentioned effect significantly.
In the present embodiment, the aqueduct 51 of coaxial setting and roller main body 41 in identical sense of rotation, be that the sense of rotation R shown in (b) of Fig. 5 goes up towards the equidirectional rotation, preferred water-cooled mechanism 5 rotates towards equidirectional with roller main body 41.
Generally speaking, under the situation of the internal surface shower cooling water of cooling roller, can the bottom in cooling roller accumulate the water coolant after the use.In the present embodiment, be set at equidirectional by sense of rotation with water-cooled mechanism 5 and roller main body 41, make the above-mentioned water coolant W that lodges in the inside of cooling roller 4 like that be stirred, thereby can reduce partial water coolant boiling, reduce the non-uniform temperature of water coolant etc.Thus, with above-mentioned same, can obtain the cooling performance of the internal surface 41a of roller main body 41 more equably, cooling efficiency further improves, and can prevent the damage of mechanical component and make roller main body long lifetime, thereby can carry out stable operation.
In addition, in the present embodiment, example as shown in Figure 7 more preferably adopts the structure that is formed with slot part 42c on the internal surface 42b of roller main body 42.
The roller inner surface side that is applied to the cooling roller in the general manufacturing installation forms tabular surface, and therefore, especially smaller situation is inferior in roller footpath may cause the cooling power deficiency because of the surface-area deficiency.In the present embodiment, on internal surface 42b, be formed with slot part 42c such concavo-convex, the structure that rises and falls, increased the surface-area of internal surface 42b in fact by adopting.Thus, by water coolant W being injected into the cooling performance that internal surface 42b can further improve roller main body 42.Therefore, can prevent the damage of mechanical component and make roller main body long lifetime, thereby can carry out stable operation.
In addition, consider that from more stably obtaining above-mentioned effect aspect the degree of depth of the slot part 42c in the preferred example shown in Figure 7 is in 0.2～1mm scope.And, in illustrative example,, be not limited thereto though slot part 42c forms concavity, for example also can form leg-of-mutton slot part.
In the manufacturing installation 1 of the present embodiment of said structure, the water coolant W that water spraying nozzle 52 is injected into the internal surface 41a of roller main body 41 enters in return chamber 58A, the 58B from returning hole 58a, is reclaimed by not shown reservoir part via circulation tube 51B self-circulation end 56a then.
Fragmentation portion
As ground as illustrated in Fig. 1 and Fig. 2, in the present embodiment, the casting alloy M that is cast by the cooling roller 4 that is arranged in the casting station 2 portion 3 that is broken is broken into casting alloy thin slice N.
Shown in example among the figure, broken portion 3 is made of a pair of breaker roll 31,31, casting alloy M is clipped between the breaker roll 31,31 of two rotations, cuts apart and is processed to casting alloy thin slice N thereby casting alloy M is broken.Then, in example shown in Figure 1, the casting alloy thin slice N after fragmentation is cut apart falls downwards, and is transferred out by container 8.
Container
As shown in Figure 1, can comprise container 8 in the present embodiment, this container 8 can be deposited casting alloy thin slice N.
The various metallic substance that the material of container 8 can adopt for example stainless steel, iron, the anti-corrosion Langaloy of haas troy (hastelloy), Inco nickel refractory alloy (inconel) etc. at high temperature to use.
In addition, in the manufacturing installation 1 of illustrative example, be provided with and be used to travelling belt 9 that container 8 can be moved, with container 8 mountings on travelling belt 9, thereby container 8 can move along left and right directions in Fig. 1.
In addition, in chamber 10, be provided with door (gate) 11,, by this door 11 chamber 10 sealed under all the other situations except container 8 being delivered to the device outside, being the situation of outside of chamber 10.
In addition, in the present embodiment, also can adopt in side and be provided with the formation that is used for placing the not shown placement cooling room of refrigerative for the casting alloy thin slice N after the heating across the chamber 10 of door 11.In addition, can also place at this and be provided with other door in cooling room, container 8 can be transported to the outside of chamber 10 by opening this.
The action of the manufacturing installation of R-T-B based rare earth alloy
Below, the action of the manufacturing installation 1 when 1 pair of the manufacturing installation of use present embodiment is made R-T-B based rare earth alloy describes.
At first, preparation alloy liquation L in not shown smelting apparatus.Though the temperature of alloy liquation L according to alloying constituent and different, is adjusted at 1300 ℃～1500 ℃ scope with it.Then, the alloy liquation L for preparing is transported to casting station 2 together with each fire-clay crucible 61, from fire-clay crucible 61 alloy liquation L is supplied to tundish 6.
Next, alloy liquation L is supplied to cooling roller 4 and alloy liquation L is solidified, become casting alloy M from tundish 6.Subsequently, with the position of the opposite side of supply side of alloy liquation L casting alloy M is broken away from from cooling roller 4.And, casting alloy M is clipped between the breaker roll 31,31 of two rotations and makes its fragmentation, become casting alloy thin slice N.
In addition, the average cooling rate of preferred alloy liquation L on cooling roller 4 is 500～2000 ℃ of per seconds.Average cooling rate is that speed of cooling is enough under the situation of per second more than 500 ℃, can prevent separating out and thickization of the tissue that rich R equates of α-Fe.In addition, condensate depression can be not excessive under the situation of per second below 2000 ℃ for the average cooling rate of alloy liquation L, can prevent to generate micro organization.
The casting alloy thin slice N of roller 31 fragmentations of being broken is housed in the container 8.Then, open the door 11 of chamber 10 and container 8 is delivered to the outside, casting alloy thin slice N is removed, and makes and finishes.
As mentioned above, adopt the manufacturing installation of R-T-B based rare earth alloy of the present utility model, in the casting station 2 that utilizes the rapid hardening casting that alloy liquation L is cast, the water-cooled mechanism 5 that is located at cooling roller 4 inside adopts following structure: this water-cooled mechanism 5 is by aqueduct 51, spray nozzle 52, nozzle ingress pipe 53 and cup 57 constitute, above-mentioned aqueduct 51 is with coaxial with roller main body 41, and the mode of extending to the outside from roller main body 41 inside is provided with, be used for water coolant W guide-in roller main body 41 inside, above-mentioned spray nozzle 52 is a tubulose, in roller main body 41 inside, around aqueduct 51, be provided with a plurality of these spray nozzles 52 in the mode parallel with this aqueduct 51, and on this spray nozzle 52, be formed with a plurality of jet hole 52a that are used for water coolant W is injected into above-mentioned roller main body 41 internal surfaces, the water coolant W that said nozzle ingress pipe 53 is used for utilizing aqueduct 51 to be imported into roller main body 41 inside imports spray nozzle 52, and above-mentioned cup 57 is located between aqueduct 51 and the nozzle ingress pipe 53.Make R-T-B based rare earth alloy by the manufacturing installation 1 that uses this structure, can high-level efficiency and cool off equably, cooling efficiency improves, and can prevent the damage of mechanical component and make roller main body long lifetime.Therefore, can carry out stable operation, and the manufacturing installation 1 of the R-T-B based rare earth alloy of productivity excellence can be provided.
In addition, have in employing under the situation of structure of heating part (not shown), by R-T-B based rare earth alloy is carried out heat treated, can improve the coercive force of the permanent magnet that constitutes by R-T-B based rare earth alloy, so can reduce the Dy in the alloy, the ratio of components of Tb.Like this, by reducing the Dy in the alloy, the ratio of components of Tb, also can improve relict flux density.
Generally speaking, R-T-B based rare earth alloy is the alloy that mainly contains element R, element T and B (boron), this element R will obtain after other rare earth element displacement with Pr, Dy, Tb etc. of the part of Nd, and this element T is that a part with Fe obtains after with element substitutions such as Co, Ni.The coercive force of the permanent magnet that the R-T-B based rare earth alloy that is made of such alloy constitutes but then, has the tendency of relict flux density reduction along with the ratio of components of the Dy in the alloy, Tb increases and improves.With respect to this, in the present embodiment, as mentioned above, by utilizing the heating part to carry out heat treated, can improve the coercive force of the permanent magnet that constitutes by R-T-B based rare earth alloy, in addition, by reducing the Dy in the alloy, the ratio of components of Tb, can improve relict flux density.
In addition, technical scope of the present utility model is not defined as present embodiment, can carry out various changes in the scope that does not break away from purport of the present utility model.
For example, in the present embodiment, mainly with shown in Figure 5, comprised and be roughly by vertical view the spray nozzle 52 of T font syndeton and the water-cooled mechanism 5 of nozzle ingress pipe 53 are that example describes, but as shown in Figure 8, the side 157A that also can adopt at cup 157 mode sentencing level and be pectination is connected with the structure of a plurality of spray nozzles 152.
As mentioned above, in manufacturing installation in the past, flow in the top that water coolant is difficult in cooling roller, so the inhomogeneous cooling on cooling roller surface is even, can not bring into play the cooling performance of regulation.
Relative therewith, structure according to as shown in Figure 8 water-cooled mechanism, roughly be spray nozzles 152 that pectination is provided with to cooling roller internal surface shower cooling water from a plurality of, thereby water coolant is supplied to the top of cooling roller internal surface equably, can evenly and efficiently cool off cooling roller.Thus, with above-mentioned same, can prevent the damage of mechanical component and make roller main body long lifetime.Therefore can carry out stable operation.
In addition, in the utility model, as shown in Figure 9, also can adopt the structure that is connected with columnar spray nozzle 252 at the side 257A of cup 257.
Structure according to as shown in Figure 9 water-cooled mechanism, from the spray nozzle 252 of round shape to cooling roller internal surface shower cooling water, with similarly above-mentioned, water coolant is supplied to the top of cooling roller internal surface equably, can evenly and efficiently cool off cooling roller.Therefore, with similarly above-mentioned, can prevent the damage of mechanical component and make roller main body long lifetime.Thereby can carry out stable operation.
In addition, under the situation of the spray nozzle 152,252 that adopts Fig. 8 and structure shown in Figure 9, also can adopt the jet hole (with reference to the Reference numeral 252a among Reference numeral 152a, Fig. 9 among Fig. 8) that spray angle θ is set and forms as described above, can obtain effect same as described above.
In addition, manufacturing installation of the present utility model not only can be used to make R-T-B based rare earth alloy, also can be applied to make thermoelectric semiconductor alloy, hydrogen-storage alloy.
As thermoelectric semiconductor alloy, can example illustrate and use general formula A
3-xB
xThe alloy of C (wherein, A and B are at least a in the transition metal of Fe, Co, Ni, Ti, V, Cr, Zr, Hf, Nb, Mo, Ta, W etc., and C is at least a among 13 families such as Al, Ga, In, Si, Ge, Sn or the 14 family's elements) expression.
In addition, also can example illustrate (wherein with general formula ABC, A and B are at least a in the transition metal of Fe, Co, Ni, Ti, V, Cr, Zr, Hf, Nb, Mo, Ta, W etc., and C is at least a among 13 families such as Al, Ga, In, Si, Ge, Sn or the 14 family's elements) alloy of expression.
And, also can example illustrate and use general formula R E
x(Fe
1-yM
y)
4Sb
12(RE is at least a among La, the Ce, and M is at least a for what select from the group who is made of Ti, Zr, Sn, Pb.0＜x≤1,0＜y＜1) expression rare earth alloy.
And, also can example illustrate and use general formula R E
x(Co
1-yM
y)
4Sb
12(RE is at least a among La, the Ce, and M is at least a for what select from the group who is made of Ti, Zr, Sn, Cu, Zn, Mn, Pb.0＜x≤1,0＜y＜1) expression rare earth alloy.
In addition, as hydrogen-storage alloy, can AB be shown example
2Type alloy (alloy with transition element such as titanium, manganese, zirconium, nickel is basic formed alloy) or AB
5Type alloy (comprising with respect to rare earth element, niobium, zirconium is 1 part, and the transition element (nickel, cobalt, aluminium etc.) with katalysis is that 5 parts alloy is basic formed alloy) etc.
Claims (1)
1. the manufacturing installation of a R-T-B based rare earth alloy is characterized in that, this manufacturing installation comprises at least:
Casting station, it adopts the rapid hardening casting that the alloy liquation is cast;
Fragmentation portion, it is used for the casting alloy fragmentation after the casting,
Above-mentioned casting station is at least by the cooling roller that is used to cast above-mentioned casting alloy and is provided with in the mode that can rotate and be used for the tundish that above-mentioned alloy liquation is supplied to this cooling roller surface is constituted,
Above-mentioned cooling roller is made of with the water-cooled mechanism that is located at this cooling roller body interior the cooling roller main body,
Above-mentioned water-cooled mechanism is by constituting with the lower section:
Aqueduct, it is provided with in mode coaxial with above-mentioned roller main body and that extend to the outside from above-mentioned roller body interior, is used for water coolant guide-in roller body interior;
Spray nozzle, it is a tubulose, in above-mentioned roller body interior, around above-mentioned aqueduct, be provided with a plurality of these spray nozzles, and on this spray nozzle, be formed with a plurality of jet holes that are used for water coolant is injected into above-mentioned roller body inner surface in the mode parallel with this aqueduct;
The nozzle ingress pipe, its water coolant that is used for utilizing above-mentioned aqueduct to be imported into above-mentioned roller body interior imports above-mentioned spray nozzle;
Cup is located between above-mentioned ingress pipe and the said nozzle ingress pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982754U CN201942737U (en) | 2010-12-28 | 2010-12-28 | Device for producing R-T-B series rare earth alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982754U CN201942737U (en) | 2010-12-28 | 2010-12-28 | Device for producing R-T-B series rare earth alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201942737U true CN201942737U (en) | 2011-08-24 |
Family
ID=44470084
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206982754U Expired - Lifetime CN201942737U (en) | 2010-12-28 | 2010-12-28 | Device for producing R-T-B series rare earth alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201942737U (en) |
-
2010
- 2010-12-28 CN CN2010206982754U patent/CN201942737U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Baotou Showa rare earth hi tech new material Co Ltd Assignor: Showa Denko K. K. Contract record no.: 2012990000431 Denomination of utility model: Manufacturing device for R-T-B series rare-earth alloy Granted publication date: 20110824 License type: Exclusive License Record date: 20120619 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20190606 Address after: Tokyo, Japan, Japan Patentee after: TDK Corp. Address before: Tokyo, Japan, Japan Patentee before: Showa Denko K. K. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
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