CN104185513A - Method for manufacturing alloy pieces and apparatus for sorting alloy pieces - Google Patents
Method for manufacturing alloy pieces and apparatus for sorting alloy pieces Download PDFInfo
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- CN104185513A CN104185513A CN201380012856.4A CN201380012856A CN104185513A CN 104185513 A CN104185513 A CN 104185513A CN 201380012856 A CN201380012856 A CN 201380012856A CN 104185513 A CN104185513 A CN 104185513A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/12—Apparatus having only parallel elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Continuous Casting (AREA)
- Combined Means For Separation Of Solids (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
A method for manufacturing alloy pieces, wherein strip-cast alloy pieces are supplied to a comb-shaped sieve (13) having slitted gaps (16) formed by a plurality of teeth (15) disposed at a predetermined pitch (W), the sieve (13) is caused to vibrate, and the alloy pieces are sorted into those that pass through the slitted gaps (16) and those remaining on the sieve (13), making it possible to efficiently sort thin alloy pieces and irregularly shaped alloy pieces, and manufacture alloy pieces without having irregularly shaped alloy pieces mixed therewith. If the average thickness of the alloy pieces supplied to the comb-shaped sieve (13) is T, the pitch (W) between the teeth (15) of the comb-shaped sieve (13) is preferably 10T or less.
Description
Technical field
The present invention relates to utilize sieve to utilizing the manufacture method of the alloy sheet screening with the fluid origin alloy sheet of casting.Further specifically, relating to use comprises the sieve of the slit being become by comb shape and alloy sheet is screened to the manufacture method into the alloy sheet of laminar alloy and special-shaped alloy sheet efficiently.In addition, relate to and alloy sheet can be screened to the screening plant into the alloy sheet of laminar alloy and special-shaped alloy sheet efficiently.
Background technology
It is the casting method that can make the alloy of motlten metal chilling with casting.Due to its chilling effect, adopt band casting, can seek the miniaturization of the crystal grain of cast alloy.In addition, when the R-T-B alloy using at the raw material of the rare earth element magnet to as magnet excellent is cast, can suppress the magnetic characteristic of rare earth element magnet to be brought the generation of dysgenic α-Fe.Therefore, be mostly used in the casting of the alloy that the raw material of rare earth element magnet uses with casting.At this, " R " in " R-T-B is associated gold " refers to rare earth element, and " T " is the transition elements that must comprise Fe, and " B " refers to boron.
Fig. 1 is the schematic diagram of the casting device that uses while representing with casting casting alloy band.Casting device shown in Fig. 1 comprises chamber 5, crucible 1, tundish 2 and chill roll 3.Chamber 5 is by making inner sustain in decompression state or non-active gas atmosphere, thus prevent molten alloy and fluid origin alloy band oxidized.
In the case of using such casting device and utilizing with casting casting alloy band, for example, can carry out according to following steps.
(A) raw material is packed in crucible 1, use not shown induction heating apparatus to heat this raw material, thereby this raw material is melted, form molten alloy.
(B), when this molten alloy supply to the outer peripheral face of chill roll 3 via tundish 2, because chill roll 3 has the structure for cold-producing medium circulation in inside, therefore, molten alloy is solidified by chilling at the outer peripheral face of chill roll 3.The situation of below molten alloy of outer peripheral face that is supplied to chill roll 3 being solidified by chilling is also referred to as " melting pull " (Japanese: メ Le ト De ラ ッ グ).
(C) so, cast out the alloy band 4 of the thin ribbon shaped of thickness 0.1mm～1.0mm, chill roll 3 to applying of Fig. 1 the direction rotation shown in the arrow of shade, therefore, alloy band 4 departs from (separation) from chill roll 3 together therewith.
Utilize like this alloy band with the fluid origin thin ribbon shaped of casting to become laminar alloy sheet (below also referred to as " laminar alloy " by broken.), this alloy sheet condition is according to the rules cooled.In order to prevent the oxidation of alloy band and alloy sheet, the cooling of the fragmentation of alloy band and alloy sheet under reduced pressure or under non-active gas atmosphere carries out conventionally.
The laminar alloy producing with casting for utilization had proposed various motions in the past.For example, the method that patent documentation 1 is recorded is the manufacture method of having carried out fine rare earth alloy powder after raw alloy meal (laminar alloy) having been carried out to inhale hydrogen processing, wherein, to contain a more than 50 quality % maximum cun method be thick powder more than 2mm to above-mentioned raw materials alloy meal.Thus, in patent documentation 1, can suppress deteriorated, the heating sharply while inhaling hydrogen of the magnetic characteristic that caused by the increase of oxygen amount, the stably rare earth alloy powder of industry characteristics excellence.In addition, in patent documentation 1, recording the maximum cun method of removal from raw alloy meal (laminar alloy) is the content of the attritive powder below 250 μ m.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2006-283095 communique
Summary of the invention
the problem that invention will solve
But, adopt band when casting, when from crucible to basket pouring, or during from tundish to chill roll melting pull, inevitably produce path bulk alloy, thin slice welding alloy etc. and (also they are referred to as to " special-shaped alloy sheet " below.)。Therefore, special-shaped alloy sheet is sneaked into the laminar alloy as product sometimes.Path bulk alloy is because splashing of molten alloy produces, and thin slice welding alloy is the welding and generating each other of laminar alloy.
The cooling velocity of cooling velocity when the casting of special-shaped alloy sheet like this during from the casting of laminar alloy is different, therefore, and with laminar alloy phase ratio, sometimes crystalline orientation sexual disorder, especially, be associated golden in the situation that for R-T-B, the containing ratio of α-Fe is higher sometimes.
Therefore, distinguish at special-shaped alloy sheet and be blended into by R-T-B and be associated the raw material that rare earth element magnet that gold forms uses, the magnetic characteristic of rare earth element magnet is produced to harmful effect., in order to obtain the rare earth element magnet having excellent magnetic characteristics, the laminar alloy of not sneaking into special-shaped alloy sheet need to be used as raw material.In patent documentation 1, the impact special-shaped alloy sheet not being brought to the magnetic characteristic of rare earth element magnet is studied.In addition, in patent documentation 1, as the method for removing attritive powder, listed the method for using the sieve of the mesh with regulation to sieve, but do not mentioned completely for the shape of sieve, the size of mesh.
At this, the sieve using as screening, is generally metal mesh screen processed (JISZ8801-1:2006).But the shape of the mesh of this sieve is square, regardless of the size of mesh, be not suitable for utilizing the screening with the fluid origin alloy sheet of casting.Particularly, be not suitable for from the mixture of laminar alloy and special-shaped alloy sheet, special-shaped alloy sheet being sieved.
Its reason is, the phenomenon of recording due to following (1) and (2), and the efficiency of screening is not high.
(1) in order to make special-shaped alloy sheet remain in that sieve is upper, while dwindling mesh, it is upper that laminar alloy also remains in sieve, the Efficiency Decreasing of screening.
(2) contrary, in the time increasing mesh, although remaining quantity reduces on the sieve of laminar alloy, on the sieve of special-shaped alloy sheet, remaining quantity reduces too.
The present invention makes in view of such situation, and its object is, provides a kind of alloy sheet that utilization can be produced with casting screen efficiently as laminar alloy and special-shaped alloy sheet and can manufacture the method for the alloy sheet of not sneaking into special-shaped alloy sheet.In addition, its object is, provides and alloy sheet can be screened to the screening plant into the alloy sheet of laminar alloy and special-shaped alloy sheet efficiently.
for the scheme of dealing with problems
The inventor, in order to address the above problem, is studied the screening technique that utilizes the alloy sheet producing with casting.Result has obtained following discovery.By being conceived to the different sieves of having expected using the pectination in the gap with slit-shaped being formed by multiple teeth of the arranged spaced with regulation of the shape between laminar alloy and special-shaped alloy sheet.In the time making this sieve vibration, only become the laminar alloy of the state of erecting by the gap of slit-shaped, special-shaped alloy sheet remains in sieve, can screen efficiently laminar alloy and special-shaped alloy sheet.
The discovery of the present invention based on above-mentioned completes, taking the manufacture method of alloy sheet of following (1) and (2) and the screening plant of the alloy sheet of following (3) as purport.
(1) a kind of manufacture method of alloy sheet, it is characterized in that, the sieve of the pectination in the gap with slit-shaped that utilization is formed to multiple teeth of the arranged spaced by with regulation with the fluid origin alloy sheet of casting is supplied with, make above-mentioned sieve vibration, thereby be passed through the alloy sheet in the gap of above-mentioned slit-shaped and remained in the alloy sheet on above-mentioned sieve by supplied with alloy sheet screening.
(2) according to the manufacture method of the alloy sheet above-mentioned (1) Suo Shu, it is characterized in that, the average thickness of the alloy sheet of supplying with at sieve to above-mentioned pectination is T, being spaced apart below 10T of the tooth of the sieve of above-mentioned pectination.
(3) screening plant for alloy sheet, is characterized in that, the screening plant of this alloy sheet comprises the sieve of the pectination in the gap with slit-shaped being formed by multiple teeth of the arranged spaced with regulation.
the effect of invention
According to the manufacture method of alloy sheet of the present invention, the alloy sheet that utilization can be produced with casting screens efficiently as laminar alloy and special-shaped alloy sheet, can manufacture the alloy sheet of not sneaking into special-shaped alloy sheet.
In addition, according to the screening plant of alloy sheet of the present invention, alloy sheet can be screened efficiently as laminar alloy and special-shaped alloy sheet.
By using the alloy sheet being produced by the manufacture method of alloy sheet of the present invention or using the alloy sheet that utilizes the screening plant of alloy sheet of the present invention to filter out, can manufacture the rare earth element magnet having excellent magnetic characteristics.
Brief description of the drawings
Fig. 1 is the schematic diagram that represents to utilize the casting device using during with casting casting alloy band.
Fig. 2 is the schematic diagram that represents the screening plant of alloy sheet of the present invention.
Fig. 3 is the partial enlarged drawing of sieve, and Fig. 3 (a) is top view, and (b) of Fig. 3 is main cutaway view.
Detailed description of the invention
The manufacture method of alloy sheet of the present invention as previously mentioned, it is characterized in that, the sieve of the pectination in the gap with slit-shaped that utilization is formed to multiple teeth of the arranged spaced by with regulation with the fluid origin alloy sheet of casting is supplied with, make above-mentioned sieve vibration, thereby be passed through the alloy sheet in the gap of above-mentioned slit-shaped and remained in the alloy sheet on above-mentioned sieve by supplied with alloy sheet screening.In addition, the screening plant of alloy sheet of the present invention is characterised in that, the inventive system comprises the sieve of the pectination in the gap with slit-shaped being formed by multiple teeth of the arranged spaced with regulation.The reason limiting as described above of the screening plant of the manufacture method to alloy sheet of the present invention and alloy sheet of the present invention and preferred mode describe below.
Fig. 2 is the schematic diagram that represents the screening plant of alloy sheet of the present invention.Screening plant shown in Fig. 2 comprises input hopper 11, supply feeder 12, sieve 13, product container 17 and special-shaped alloy sheet container 18.Sieve 13 is sieves of pectination, has screened container 14 and is configured in multiple teeth 15 of the inside of screened container 14, not shown vibrating device.Tooth 15, with the interval W configuration of regulation, is formed with the gap 16 of slit-shaped.
Fig. 3 is the partial enlarged drawing of sieve, and (a) of Fig. 3 is that (b) of top view, Fig. 3 is main cutaway view.As shown in Fig. 3 (b), it is the smooth and narrower shape of width downwards of upside that the shape of tooth 15 has cross section.
Alloy sheet is fed into and drops in hopper 11.This alloy sheet is to obtain by aforesaid utilization is carried out to fragmentation with the alloy band of the fluid origin thin ribbon shaped of casting, has likely sneaked into the special-shaped alloy sheet such as path bulk alloy, thin slice welding alloy in laminar alloy sheet (laminar alloy).
Be put to the alloy sheet dropping in hopper 11 and be supplied to feeder 12 amount in accordance with regulations separately, in supply feeder 12, be transferred, supply with to sieve 13.Utilize not shown vibrating device to apply vibration to sieving 13, accompany therewith, be supplied to the alloy sheet vibration of sieve 13.
When laminar alloy in alloy sheet becomes standing shape state due to vibration, when thickness direction becomes level, under the effect of gravity and by the gap 16 of slit-shaped, fall to the bottom surface of screened container 14.On the other hand, the path bulk alloy of special-shaped alloy sheet and thin slice welding alloy are all difficult to pass through gap 16 by vibrating.Its reason is, for path bulk alloy, conventionally, even if the part of diameter minimum also has the diameter of 2 times of the thickness of laminar alloy.In addition, for thin slice welding alloy, owing to being overlapping the forming of multiple laminar alloys, also at least there is the part of 2 times of above thickness of laminar alloy.Therefore, special-shaped alloy sheet is blended into the laminar alloy that has passed through gap 16 hardly, can screen efficiently laminar alloy.
The laminar alloy that drops to the bottom surface of screened container 14 is carried and is accommodated by product container 17 to product container 17, and the alloy sheet remaining on sieve 13 is carried and accommodated by special-shaped alloy sheet container 18 to special-shaped alloy sheet container 18 as special-shaped alloy sheet.
In the case of the screening plant of the manufacture method of alloy sheet of the present invention or alloy sheet of the present invention being applied to the manufacture of the raw material that rare earth element magnet uses, the rare earth element magnet that the laminar alloy obtaining is used as raw material can not sneaked into special-shaped alloy sheet in raw material, therefore, have excellent magnetic characteristics.In the raw material of using at rare earth element magnet, sneak into special-shaped alloy sheet, path bulk alloy, thin slice welding alloy etc., bring described in dysgenic the reasons are as follows.
Path bulk alloy be in the manufacture process of carrying out with casting in utilization during from crucible to basket pouring because splashing of molten alloy produces.In addition, the thin slice welding alloy laminar alloy that is molten alloy when from tundish to chill roll melting pull welding and generating each other.
The laminar alloy phase comparison of above-mentioned special-shaped alloy sheet and the roller chilling that is cooled, setting rate is slower, and therefore, alloy structure is inhomogeneous.Particularly, setting rate is slack-off, therefore, and alloy structure coarsening sometimes.In addition, due to the difference of the composition of alloy, composition system, above-mentioned special-shaped alloy sheet includes due to the α-Fe of the soft magnetism crystallizing out by the peritectoid region of R-Fe-B pseudobinary system alloy etc. sometimes.At this, " R-Fe-B pseudobinary system alloy " is contained in above-mentioned R-T-B and is associated gold.
When the inhomogeneous special-shaped alloy sheet of such alloy structure is sneaked into as the laminar alloy of product, powder characteristics, the forming characteristic of the comminuted powder to the alloy in the manufacturing process of rare earth element magnet bring harmful effect, and then until agglutinating property, magnetic characteristic are brought to harmful effect.
Thereby, in the case of the screening plant of the manufacture method of alloy sheet of the present invention or alloy sheet of the present invention being applied to the manufacture of the raw material that rare earth element magnet uses, the laminar alloy obtaining is pulverized and powder characteristics, forming characteristic and the agglutinating property of the powder that obtains become good.The rare earth element magnet that the laminar alloy that thus, can make to obtain uses as raw material improves magnetic characteristic.
Compared with the sieve that the interval W of tooth is less than 1mm is sieve more than 1mm with W, manufacturing cost uprises.In addition, as mentioned above, utilizing the thickness of the alloy band with the fluid origin thin ribbon shaped of casting is 0.1mm～1.0mm.Therefore, in the manufacture method of alloy sheet of the present invention or the screening plant of alloy sheet of the present invention, be made as T at the average thickness of alloy sheet that will supply with to sieve, preferably the interval W of the tooth of sieve is below 10T.
In addition, more preferably the interval W of the tooth of sieve is below 4T.This is that the inventor is on screening as the thickness of the laminar alloy of certified products, bringing the special-shaped alloy sheet of impact to carry out the value that at length research institute finds to the magnetic characteristic of rare earth element magnet.The interval W of the tooth of sieve is made as below 4T, and suitably adjusts the vibration that sieve is applied, thereby can screen efficiently.
In addition, in the time of the manufacture of alloy sheet, in course of conveying, sometimes under the impact of vibration, produce a little micro mist.This micro mist is easily oxidized, therefore, especially, in the time that the raw material using alloy sheet as rare-earth sintered magnet uses, in sintering circuit, can become bad essential factor.Therefore,, in the manufacture method of alloy sheet of the present invention, for the laminar alloy filtering out, preferably use the circle sieve of for example mesh below 1mm to remove the micro mist of alloy.
Embodiment
Verify for the effect of the screening plant of the manufacture method to alloy sheet of the present invention and alloy sheet of the present invention, carried out following test.
test method
In this test, use the R-T-B of 600kg to be associated the gold molten alloy of (containing the alloy that Nd:30 quality % and B:1 quality % and remainder are made up of Fe), utilize the alloy band that has obtained thin ribbon shaped with casting.The target thickness T of alloy band when manufacture is 0.5mm.With 30kg/min～50kg/min, this alloy band is cut out from feeder, implemented break process to being filled with the destroyer input of non-active gas.In by the broken alloy sheet obtaining, the mean value of 100 of random extraction the major diameters that alloy sheet is measured, minor axis and thickness is respectively to 6.3mm, 4.5mm and 0.52mm.
Filter out laminar alloy and special-shaped alloy sheet by the broken alloy sheet utilization obtaining.The screening of being undertaken by sieve is carried out under the conditions shown in Table 1.The laminar alloy filtering out carries out sintering and forms magnet with method described later.
[table 1]
﹡, in comparative example, is the size of mesh of sieve
As shown in table 1, in the inventive example 1～3, as sieve, the sieve of the pectination in the gap with slit-shaped that the multiple teeth by arranged spaced with regulation of use as shown in above-mentioned Fig. 2 and Fig. 3 form, utilizes vibrating device to make sieve vibration.Vibration condition is as follows: amplitude is 4.9mm～6.1mm, and frequency is 906cpm.For the interval W of tooth, in the inventive example 1, be 1.0mm, in the inventive example 2, be 2.0mm, in the inventive example 3, be 2.5mm.Relation between the interval W of these teeth and the average thickness T of alloy sheet is equivalent to respectively W=2T, 4T and 5T.
Comparative example is existing method, as sieve, uses Taylor's wire-mesh screen of mesh 5.6mm, with manually making sieve vibration.
sintered magnet
The laminar alloy being filtered out by sieve is with hydrogen pressure 2kg/cm
2carry out hydrogenation pulverizing, then carry out the dehydrogenation processing of 1 hour with 500 DEG C in a vacuum, thereby carried out hydrogen fragmentation (coarse crushing).Use high purity N
2and with 6kg/cm
2gas pressure, corase meal after coarse crushing is pulverized with jet pulverizer, thereby has been obtained attritive powder.Carry out grain diameter measurement with air permeability method, the average grain diameter that obtains this attritive powder is 3.1 μ m.
By the attritive powder obtaining at 2500kAm
-1vertical magnetic field in carry out with pressure 150MPa stamping, thereby formed powder compact.By this powder compact sintering 3 hours at 1050 DEG C, form sintered body, this sintered body is implemented the heat treatment of 1 hour at 600 DEG C, thereby be formed as permanent magnet.
By implemented heat treated sintered body be cut into 10mm square after, with surface grinding machine, its end face ground and formed sintered magnet.Coercive force (iHc) and relict flux density (Br) with B-H measuring instrument (Japanese: ト レ ー サ ー) to the sintered magnet obtaining are measured.
result of the test
In table 1, represent weight and the rate of recovery of the alloy sheet reclaiming as special-shaped alloy sheet and represented the iHc of magnetic characteristic and the value of Br as sintered magnet together with the condition of sieving.The rate of recovery of the alloy sheet reclaiming as special-shaped alloy sheet refers to, the ratio of the molten alloy of the 600kg that the weight of the alloy sheet reclaiming as special-shaped alloy sheet is used during with respect to casting.
In the case of the sieve of pectination that has used the gap with slit-shaped (inventive example 1～3), the interval of tooth is less, and the weight of the alloy sheet reclaiming as special-shaped alloy sheet is more, and the rate of recovery is better.In addition, having used in the comparative example of Taylor's wire-mesh screen, compared with any condition in the inventive example 1～3, the weight of the alloy sheet reclaiming as special-shaped alloy sheet is less, and the rate of recovery is poor.
The magnetic characteristic of sintered magnet is that iHc is more than 9.8kOe, Br is more than 13.5kG excellent like this value in the inventive example 1～3.Especially being in the inventive example 1 and 2 below 4T at the interval W of the tooth of the sieve of pectination, is more excellent value.But in the inventive example 1 and 2, magnetic characteristic does not have larger difference.In comparative example, iHc=9.5kOe and Br=13.0kG, be the value poorer than the inventive example 1～3.
Can be clear and definite from these: there is the sieve of the pectination in the gap of slit-shaped by use, can will utilize the fluid origin alloy sheet of band casting to screen efficiently as laminar alloy and special-shaped alloy sheet.In addition, also can be clear and definite: by using the alloy sheet of not sneaking into special-shaped alloy sheet, can obtain the magnet with excellent magnetic characteristic.
utilizability in industry
According to the manufacture method of alloy sheet of the present invention, the alloy sheet that utilization can be produced with casting screens efficiently as laminar alloy and special-shaped alloy sheet, can manufacture the alloy sheet of not sneaking into special-shaped alloy sheet.
In addition, according to the screening plant of alloy sheet of the present invention, alloy sheet can be screened efficiently as laminar alloy and special-shaped alloy sheet.
By using the alloy sheet being produced by the manufacture method of alloy sheet of the present invention or the alloy sheet that uses the screening plant of alloy sheet of the present invention to filter out, can manufacture the rare earth element magnet having excellent magnetic characteristics.
description of reference numerals
1, crucible; 2, tundish; 3, chill roll; 4, alloy band; 5, chamber; 6, motlten metal; 11, drop into hopper; 12, supply with feeder; 13, sieve; 14, screened container; 15, tooth; 16, gap; 17, product container; 18, special-shaped alloy sheet container.
Claims (3)
1. a manufacture method for alloy sheet, is characterized in that,
The sieve of the pectination in the gap with slit-shaped that utilization is formed to multiple teeth of the arranged spaced by with regulation with the fluid origin alloy sheet of casting is supplied with, make above-mentioned sieve vibration, thereby be passed through the alloy sheet in the gap of above-mentioned slit-shaped and remained in the alloy sheet on above-mentioned sieve by supplied with alloy sheet screening.
2. the manufacture method of alloy sheet according to claim 1, is characterized in that,
The average thickness of the alloy sheet of supplying with at sieve to above-mentioned pectination is T, being spaced apart below 10T of the tooth of the sieve of above-mentioned pectination.
3. a screening plant for alloy sheet, is characterized in that,
The screening plant of this alloy sheet comprises the sieve of the pectination in the gap with slit-shaped being formed by multiple teeth of the arranged spaced with regulation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-051144 | 2012-03-08 | ||
| JP2012051144A JP5706841B2 (en) | 2012-03-08 | 2012-03-08 | Alloy piece manufacturing method and alloy piece sorting apparatus |
| PCT/JP2013/001097 WO2013132780A1 (en) | 2012-03-08 | 2013-02-26 | Method for manufacturing alloy pieces and apparatus for sorting alloy pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104185513A true CN104185513A (en) | 2014-12-03 |
| CN104185513B CN104185513B (en) | 2016-11-30 |
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| JPH10113615A (en) * | 1996-10-11 | 1998-05-06 | Naoyoshi Kayama | Solids sorting device |
| JP2004163415A (en) * | 2002-10-07 | 2004-06-10 | Kawasaki Heavy Ind Ltd | System for screening radioactive waste |
| WO2006131333A2 (en) * | 2005-06-08 | 2006-12-14 | Doppstadt Calbe Gmbh | Screening device |
| JP2007270164A (en) * | 2006-03-30 | 2007-10-18 | Tdk Corp | Method for producing rare earth permanent magnet |
| CN101637759A (en) * | 2008-08-01 | 2010-02-03 | 上海天工可可食品有限公司 | Bar type vibrating screen |
Also Published As
| Publication number | Publication date |
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| JP2013184113A (en) | 2013-09-19 |
| JP5706841B2 (en) | 2015-04-22 |
| WO2013132780A1 (en) | 2013-09-12 |
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