CN109550969A - Prepare the centrifugal atomization apparatus and method of increasing material manufacturing Al/Cu base alloy powder - Google Patents
Prepare the centrifugal atomization apparatus and method of increasing material manufacturing Al/Cu base alloy powder Download PDFInfo
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- CN109550969A CN109550969A CN201811648714.8A CN201811648714A CN109550969A CN 109550969 A CN109550969 A CN 109550969A CN 201811648714 A CN201811648714 A CN 201811648714A CN 109550969 A CN109550969 A CN 109550969A
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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
- B22F9/10—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 using centrifugal force
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Abstract
The present invention provides a kind of centrifugal atomization apparatus and method for preparing increasing material manufacturing Al/Cu base alloy powder.The device includes spray chamber, atomizing disk, motor, transition tundish, screw conveyor, stopper rod and cooling device, screw conveyor outlet end connects transition tundish, transition tundish is located above spray chamber, and use Medium frequency induction device for transition Tundish Heating, stopper rod be mounted on transition tundish bottom let slip a remark top, and driven and moved up and down by cylinder, bottom discharge spout aligned beneath atomizing disk, the cooling device provides cooling for atomizing disk and/or motor.The metal powder being prepared using the device and method is fine, narrow granularity, good sphericity, good fluidity, apparent density are high, to solve the technical problems such as the poor Al/Cu base alloy powder sphericity obtained using prior art preparation, satellite ball, hollow powder, size distribution be wide.
Description
Technical field
The present invention relates to the preparation technical field of increasing material manufacturing metal powder, and in particular to a kind of metal powder for preparing
Device and method.
Background technique
Quick application now with increases material manufacturing technology in fields such as aerospace, automobile manufacture, daily necessities,
Quickling increase for increasing material manufacturing metal powder, especially Al/Cu base alloy powder demand will be brought.However, increasing material manufacturing
Technology is more demanding to raw material powder, and common powder size is micron order, narrower particle size distribution (general 15~53 μm), powder
Shape is spherical shape, good fluidity；Oxygen content is low, and ingredient is uniform, even particle size distribution；In addition, apparent density, jolt ramming to powder
Density etc. also has certain requirement.But the conventional methods such as currently used inert gas atomizer method, plasma rotating electrode process
The problems such as powder of preparation, there are sphericities poor, satellite ball, hollow powder, wide coarse size and distribution, is difficult to obtain high grade increasing
Material manufacture Al/Cu base alloy powder.
Therefore, it is very urgent with the exploitation of Al/Cu base alloy powder technology of preparing to carry out increasing material manufacturing.Compared to other atomizations
Technology, centrifugal atomizing technical operation are at low cost, and powder good sphericity, oxygen content are easy to control, can continuous industrial production the advantages that,
Become most competitive technology of preparing.But centrifugal atomizing technology is also mainly used in low temperature welding powder, function powder at present
The fields such as material, a kind of such as Chinese patent CN200410021160.0 proposition prepare low oxygen content solder powder using centrifugal atomizing
The device at end；A kind of apparatus for preparing metal powder that Chinese patent CN201210212549.8 is proposed and method etc..Although also,
Foreign countries maintain the leading position in the field, such as the U.S., Europe, Japan, but centrifugal atomizing is applied in refractory metal field
And it is very limited, main processability requires lower coarse granule powder (100 μm or more), prepares fine, narrow grain for centrifugation
The high increasing material manufacturing of degree, good sphericity, good fluidity, apparent density still has certain technical problem with Al/Cu base alloy powder,
The cooling protection of high-speed motor, high-temperature metal continuous-stable melting conveying, atomizing disk high temperature durability, inhibition when such as continuous preparation
Adhere to powder and atomization process stability control etc..
To sum up, it is low to develop a kind of operating cost, and fine, narrow granularity, good sphericity, good fluidity, pine dress can be obtained
The centrifugal atomizing preparation facilities and method of density high increasing material manufacturing Al/Cu base alloy powder are very necessary.
Summary of the invention
The main purpose of the present invention is to provide a kind of centrifugal atomizing dresses for preparing increasing material manufacturing Al/Cu base alloy powder
It sets and method.There is fine, narrow granularity, good sphericity, stream using the Al/Cu base alloy powder that the device and preparation method obtain
The dynamic advantage that property is good, apparent density is high, with solve using the Al/Cu base alloy powder sphericity being prepared in the prior art compared with
The technical problems such as difference, satellite ball, hollow powder, size distribution be wide.
To achieve the goals above, according to the first aspect of the invention, it provides and a kind of prepares increasing material manufacturing Al/Cu base
The centrifugal atomization apparatus of alloy powder.
The preparation increasing material manufacturing centrifugal atomization apparatus of Al/Cu base alloy powder includes atomising mechanism and conveying mechanism,
Wherein, the conveying mechanism includes transition tundish, stopper rod and screw conveyor；The atomising mechanism include spray chamber, motor,
Atomizing disk and cooling device；The screw conveyor outlet end connects the transition tundish, and the transition tundish is located at institute
It states above spray chamber, and uses Medium frequency induction device for the transition Tundish Heating, the stopper rod is mounted in the transition
Between above packet bottom discharge spout, and by cylinder driving up and down motion, atomizing disk described in the bottom discharge spout aligned beneath, the drop
Warm device provides cooling for the atomizing disk and/or the motor.
Further, it is equipped with protective case outside the transition tundish, and forms accommodating space between the two, the screw rod is defeated
It send device outlet end to pass through the crucible set in the protective case and the transition tundish to connect.
Further, the screw conveyor is single screw extrusion machine or double screw extruder, and the screw conveyor
It is equipped with temperature conditioning unit and speed adjustment unit.
Further, the cooling device is the strong cold water jacket being set in around the motor and/or is arranged in the mist
Change the equipment water jetting cooler of pan bottom.
Further, the atomizing disk is one of square position, taper, spherical shape, and disk diameter is 40-110mm, and revolving speed is
15000-60000r/min；The material of the atomizing disk is ceramics, graphite, molybdenum alloy, copper or stainless steel.
Further, described device further includes control cabinet and at least one smelting furnace, wherein the smelting furnace is equipped with
Mouth opening/closing device, and the smelting furnace is connect by the outlet opening/closing device with the screw conveyor input end；The control cabinet
For controlling technological parameter.
Further, described device further includes forming closed cycle with the atomising device to select sub-agencies, wherein described
Atomising device further includes return air distributor, described to select sub-agencies including receiving powder tank, bag filter, blower and multiple whirlwind point
Grade device and pneumatic dish valve, the multiple cyclone classifier connect step by step, and multiple cyclone classifier lower parts pass through it is described
Multiple pneumatic dish valves are connect with the receipts powder tank, and the return air distributor is located at the spray chamber top, the cyclone classifier
It is connect using the bag filter and blower with the return air distributor.
Further, the return air distributor along its it is circumferentially distributed have multiple through-holes, the aperture of the through-hole is 0.8-
3.5mm。
Further, the crucible is graphite crucible or alumina crucible.
Further, the stopper rod is graphite stopper rod or ceramic stopper rod.
Further, the smelting furnace is vacuum induction heating furnace or vacuum resistance heating furnace.
Further, the diameter that the transition tundish bottom is let slip a remark is 2-5mm.
To achieve the goals above, according to the second aspect of the invention, it provides and a kind of prepares increasing material manufacturing Al/Cu base
The centrifugal atomizing method of alloy powder.
This method uses above-mentioned centrifugal atomization apparatus, comprising the following steps:
(1) by filling with inert gas inside spray chamber and protective case, to guarantee transition tundish and be atomized indoor oxygen content
For 100-3000PPm；
(2) Al/Cu based alloy melt in smelting furnace is transported in the transition tundish by screw conveyor, and protected
Hold certain degree of superheat；
(3) Al/Cu based alloy melt is transported on atomizing disk by bottom discharge spout in the transition tundish, and flow is
50-200Kg/h, atomization form molten drop, and molten drop flies in spray chamber, cools down, solidifies and forms powder；Meanwhile it passing through
Filtered inert gas is generated uniform and stable return air field by return air distributor by the blower being connected with bag filter,
The metal powder generated in spray chamber is taken away in time；
(4) the Al/Cu base alloy powder of different-grain diameter is classified, is collected, complete preparation.
Further, in step (2), the degree of superheat of Al/Cu based alloy melt is 100-400 in the transition tundish
℃。
Further, the inert gas includes nitrogen, argon gas and helium.
Further, the present invention can be used for the Al/Cu based alloy powder containing elements such as Si, Mg, Sn, Cu, Zn, Ag, Sb, P
The preparation at end.
In the present invention, the Al/Cu base alloy powder obtained using the device and preparation method have fine, narrow granularity,
The high advantage of good sphericity, good fluidity, apparent density, and operating cost is low, can continuous industrial production, adopted to solve
The technologies such as the Al/Cu base alloy powder sphericity obtained with prior art preparation is poor, satellite ball, hollow powder, size distribution are wide
Problem.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the structural schematic diagram that the device of metal powder is prepared in the present invention；
Fig. 2 is the structural schematic diagram that motor adds strong cold water jacket in the present invention；
Fig. 3 is the structural schematic diagram of water cooling atomizing disk in the present invention；
Fig. 4 is AlSi in the present invention10Mg powder stereoscan photograph；
Fig. 5 is AlSi in the present invention7Mg powder stereoscan photograph；
Fig. 6 is CuSn in the present invention10Powder stereoscan photograph.
In figure:
1, spray chamber；2, motor；3, cooling device；4, atomizing disk；5, transition tundish；6, protective case；7, stopper rod；8, spiral shell
Bar conveyer；9, smelting furnace；10, opening/closing device is exported；11, return air distributor；12, cyclone classifier；13, pneumatic dish valve；14, it receives
Powder tank；15, bag filter；16, blower；17, control cabinet.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
The invention discloses a kind of centrifugal atomization apparatus for preparing increasing material manufacturing Al/Cu base alloy powder, such as Fig. 1 institute
Show, which includes atomising mechanism and conveying mechanism, wherein conveying mechanism includes transition tundish 5, stopper rod 7 and screw rod transmission
Device 8；Atomising mechanism includes spray chamber 1, motor 2, atomizing disk 4 and cooling device 3；8 outlet end of screw conveyor connects in transition
Between wrap 5, transition tundish 5 is located at 1 top of spray chamber, and intermediate frequency induction heating device use to heat for transition tundish 5, stopper rod
7 are mounted on above 5 bottom discharge spout of transition tundish, and are driven and moved up and down by cylinder, bottom discharge spout aligned beneath atomizing disk
4, cooling device 3 is that atomizing disk 4 and/or motor 2 provide cooling.
In the above-described embodiments, preparation increasing material manufacturing includes spray chamber with the centrifugal atomization apparatus of Al/Cu base alloy powder
1, motor 2, atomizing disk 4, transition tundish 5, stopper rod 7, screw conveyor 8 and cooling device 3, transition tundish 5 are located at atomization
1 top of room, 8 outlet end of screw conveyor connect transition tundish 5, and metal bath is transported in transition by screw conveyor 8
Between in packet 5, screw conveyor 8 has good airproof performance, easy to operate advantage, and transition tundish 5 also functions to the effect of sealing,
The combination of screw conveyor 8 and transition tundish 5 can prevent metal bath from aoxidizing during conveying, improve dress
Whole stability is set, stopper rod 7 is mounted on above 5 bottom discharge spout of transition tundish, and is driven and moved up and down by cylinder, bottom
It lets slip a remark aligned beneath atomizing disk 4, so that metal bath is transported on atomizing disk 4 from transition tundish 5 under the effect of gravity,
Use Medium frequency induction device for the heating of transition tundish 5, for so that metal bath keeps certain degree of superheat, in addition, cooling
The setting of device 3 can provide cooling for atomizing disk 4 and motor 2, extend the service life of atomizing disk 4 and motor 2, improve entire
The stability of device, therefore the device is particularly suitable for the preparation of refractory metal powder, and is prepared using above-mentioned apparatus
The Al/Cu base alloy powder advantage that has fine, narrow granularity, good sphericity, good fluidity, apparent density high, and the device
Operating cost is low, can continuous industrial production, improve the yield rate and production efficiency of metal powder.
Further, it is equipped with protective case 6 outside transition tundish 5, and forms accommodating space between the two, screw conveyor 8
Outlet end passes through the crucible set in protective case 6 and transition tundish 5 and connect.As shown in Figure 1, transition tundish 5 is located at spray chamber 1
Top, and it is internally provided with crucible, protective case 6 is equipped with outside transition tundish 5, and form accommodating space between the two, for filling
Enter inert protective gas, prevents molten metal oxidization, screw conveyor 8 is arranged above protective case 6 and its outlet end passes through and protects
The crucible set in sheath 6 and transition tundish 5 is connect, and the setting of protective case 6 is prevented so that transition tundish 5 is in sealing state
Only metal bath aoxidizes during conveying, improves the stability of device entirety.
Further, screw conveyor 8 is single screw extrusion machine or double screw extruder, and is set on screw conveyor 8
There are temperature conditioning unit and speed adjustment unit.Preferably, screw conveyor 8 is double screw extruder, 8 deliverying metal melt of screw conveyor
Flow and temperature control, be by the thermocouple signal in acquisition transition tundish 5 on liquidometer and screw conveyor 8, benefit
Opening or closing with PLC control melting outlet of still opening/closing device 10, the rotation speed and screw conveyor of variable frequency adjustment screw conveyor 8
8 temperature regulating device is realized.
Optionally, cooling device 3 is the strong cold water jacket being set in around motor 2.
Optionally, cooling device 3 is the equipment water jetting cooler for being arranged in 4 bottom of atomizing disk.
Optionally, cooling device 3 is the strong cold water jacket being set in around motor 2 and the spray for being arranged in 4 bottom of atomizing disk
Water-cooling apparatus.
As shown in Fig. 2, 2 exterior circumferential of motor is provided with strong cold water jacket, main purpose is to reduce the calorific value of motor, is extended
The service life of motor improves the stability of device entirety.
As shown in figure 3,4 bottom of atomizing disk is disposed with equipment water jetting cooler, main purpose is appropriate reduction by 4 knot of atomizing disk
The temperature of structure itself makes it maintain certain temperature range, improves the stability of centrifugal atomization apparatus.
Atomizing disk 4 is square position, conical disc or spherical dishes as a preferred implementation manner, and disk diameter is 40-110mm, is turned
Speed is 15000-60000r/min；The material of atomizing disk 4 is ceramics, graphite, molybdenum alloy, copper or stainless steel.According on motor 2
When strong cold water nested structure is arranged, above-mentioned atomizing disk 4 is conical disc, and its material is the high temperature resistants materials such as ceramics, graphite, molybdenum alloy
Material.It is atomized dish structure according to water cooling, 4 material of atomizing disk is the preferable metal materials of thermal conductivity such as copper, stainless steel, and requires mist
Change 4 material of disk itself or handled by overlay coating, spraying etc., to guarantee that atomizing disk 4 and atomization metal liquid soak.The present invention is excellent
Select graphite conical disc.
Crucible is graphite crucible or alumina crucible as a preferred implementation manner,.
As a kind of alternative embodiment, stopper rod 7 is graphite stopper rod or ceramic stopper rod, and stopper rod 7 drives fortune up and down by cylinder
It is dynamic, to control flowing in atomizing disk 4 from transition tundish 5 for metal bath, it is preferable that stopper rod 7 is graphite stopper rod.
Preferably, the diameter of 5 bottom discharge spout of transition tundish is 2-5mm.Metal bath is leaked by 5 bottom of transition tundish
The flow that mouth flows on atomizing disk 4 is mainly controlled by liquid level in crucible with diameter is let slip a remark, and diameter of leting slip a remark is generally
2-5mm, the flow of metal bath are 50-200Kg/h, and control precision and be less than ± 3Kg/h, to guarantee that metal bath is uniform and stable
Ground is transported in atomizing disk 4, improves the continuous-stable of whole device.
Further, above-mentioned apparatus further includes control cabinet 17 and at least one smelting furnace 9, wherein smelting furnace 9 is equipped with
Mouth opening/closing device 10, and smelting furnace 9 is connect by exporting opening/closing device 10 with 8 input end of screw conveyor；Control cabinet 17 is for controlling
Technological parameter.As shown in Figure 1, the device includes smelting furnace 9 and control cabinet 17, smelting furnace 9 is equipped with outlet opening/closing device 10, and molten
Furnace 9 is connect by exporting opening/closing device 10 with 8 input end of screw conveyor, so that the metal bath in smelting furnace 9 is transported to
In transition tundish 5, the flow and temperature of 8 deliverying metal melt of screw conveyor are controlled, and are by acquisition transition tundish 5
Thermocouple signal on liquidometer and screw conveyor 8, opening or closing using PLC control melting outlet of still opening/closing device 10, frequency conversion
The temperature regulating device of the rotation speed of adjusting screw rod conveyer 8 and screw conveyor 8 is realized.In addition, the setting to smelting furnace 9
Quantity is not especially limited, and can be separate unit smelting furnace, or and dual stage smelting furnace can regard practical condition selection,
As long as can be realized technical effect of the invention.
Further, above-mentioned smelting furnace 9 is vacuum induction heating furnace or vacuum resistance heating furnace.Preferably, of the invention
Using separate unit vacuum induction heating furnace, have heating rate fast, the advantage of homogeneous heating.
As shown in Figure 1, above-mentioned apparatus further includes forming closed cycle with atomising device to select sub-agencies, wherein atomization dress
Setting further includes return air distributor 11, and selecting sub-agencies includes receiving powder tank 14, bag filter 15, blower 16 and multiple cyclone classified
Device 12 and pneumatic dish valve 13, multiple cyclone classifiers 12 connect step by step, and 12 lower part of multiple cyclone classifiers passes through multiple gas
Dynamic dish valve 13 is connect with powder tank 14 is received, and return air distributor 11 is located at 1 top of spray chamber, and cyclone classifier 12 is using bag-type dust
Device 15 and blower 16 are connect with return air distributor 11.The quantity of cyclone classifier 12 and pneumatic dish valve 13 can be set it is multiple,
It is selected according to needs of production, and multiple cyclone stage devices 12 are identical with the working method of pneumatic dish valve 13, it is preferable that whirlwind
There are two the quantity of clasfficiator 12 is set, it can be understood as two-stage grading is carried out to the metal powder that centrifugal atomizing is completed, and
It collects.1 lower part of spray chamber is connect by pipeline with 12 top of first order cyclone classifier, 12 top of first order cyclone classifier and
The top of second level cyclone classifier 12 is connected, and 12 top of second level cyclone classifier by pipeline and bag filter 15,
Blower 16 connects, and blower 16 is connected with return air distributor 11 again, follows to realize the closed circuit of whole system inert protective gas
Ring, and 12 lower part of each cyclone classifier is connect by two pneumatic dish valves 13 with the receipts powder tank 14 that its underpart is arranged in, point
Metal powder after grade is turned on by the alternating of 12 two Pneumatic butterfly valves 13 in lower part of cyclone classifier to be received in powder tank 14, thus
Complete the continuous preparation of metal powder.
Further, return air distributor 11 along its it is circumferentially distributed have multiple through-holes, the aperture of through-hole is 0.8-3.5mm.Such as
Shown in Fig. 1, return air distributor 11 is located at the top of spray chamber 1, and along its many through-hole that circumferentially uniformly gather, the aperture of through-hole exists
Between 0.8-3.5mm, to generate uniform and stable return air field, so that the metal powder generated in spray chamber 1 be taken away in time, prevent
Only form adherency powder, satellite ball.
The invention discloses a kind of centrifugal atomizing method for preparing increasing material manufacturing Al/Cu base alloy powder, this method is adopted
With above-mentioned centrifugal atomization apparatus, comprising the following steps:
(1) raw material is added according to a certain ratio in vacuum induction heating furnace；
(2) by inflated with nitrogen, argon gas or helium inside spray chamber and protective case, to guarantee transition tundish and be atomized indoor
Oxygen content is 100-3000PPm；
(3) Al/Cu based alloy melt in smelting furnace is transported in the transition tundish by screw conveyor, and protected
The degree of superheat for holding Al/Cu based alloy melt is 100-400 DEG C；
(4) Al/Cu based alloy melt is transported on atomizing disk by bottom discharge spout in the transition tundish, and flow is
50-200Kg/h, atomization form molten drop, and molten drop flies in spray chamber, cools down, solidifies and forms powder；Meanwhile it passing through
Filtered inert gas is generated uniform and stable return air field by return air distributor by the blower being connected with bag filter,
The metal powder generated in spray chamber is taken away in time；
(5) the Al/Cu base alloy powder of different-grain diameter is classified by two cyclone classifiers, the metal powder after classification
It is opened by the alternating of two Pneumatic butterfly valves and metal powder is taken in into powder tank, complete preparation.
The present invention can be used for the preparation of the Al/Cu base alloy powder containing elements such as Si, Mg, Sn, Cu, Zn, Ag, Sb, P.
The present invention is described in further detail below by specific embodiment.
Embodiment 1:
Vacuum induction is added in the proportion that Al, Si and Mg raw material are 88.6%, 11% and 0.4% by weight percentage to add
In hot stove；
By inflated with nitrogen in spray chamber and protective case, to guarantee in transition tundish with the oxygen content of spray chamber as 1800PPm；
Vacuum induction furnace outlet opening/closing device is opened, metal bath is transported to by transition tundish by screw conveyor
In interior crucible, stopper rod is driven by cylinder and is moved up and down in transition tundish, and metal bath is leaked by bottom under the effect of gravity
Mouth be transported to immediately below atomizing disk on, by intermediate frequency power supply control at 200 DEG C, bottom discharge spout diameter is the metal bath degree of superheat
2.5mm, flow 30Kg/h drive atomization disc spins that metal bath is made to be atomized into molten drop by motor with 30000rpm,
Molten drop flies in spray chamber, cools down, solidifies and forms powder；Meanwhile the blower through being connected with bag filter, it will filter
Inert gas afterwards generates uniform and stable return air field by return air distributor, the timely band of metal powder that will be generated in spray chamber
It walks；
The metal powder of different-grain diameter is classified by two cyclone classifiers, the metal powder after classification passes through two gas
The alternating of dynamic butterfly valve, which is opened, takes in powder tank for metal powder, completes preparation.
AlSi obtained is analyzed after tested10Mg product granularity is 15-53 μm, pattern as shown in figure 4, oxygen content 200PPm,
Mobility 49s/50g, apparent density 1.56g/cm3。
Embodiment 2:
Vacuum induction is added in the proportion that Al, Si and Mg raw material are 92.3%, 7% and 0.7% by weight percentage to add
In hot stove；
By inflated with nitrogen in spray chamber and protective case, to guarantee transition tundish and be atomized indoor oxygen content as 2000PPm；
Melting outlet of still opening/closing device is opened, metal bath is transported to by crucible in transition tundish by screw conveyor
In, stopper rod is driven by cylinder and is moved up and down in transition tundish, and metal bath is conveyed by bottom discharge spout under the effect of gravity
Onto the atomizing disk of underface, the molten metal degree of superheat is controlled by intermediate frequency power supply at 260 DEG C, and diameter of leting slip a remark is 2.8mm, flow
For 42Kg/h, drive atomization disc spins that metal bath is made to be atomized into molten drop with 42000rpm by motor, molten drop exists
Flight, cooling, solidification form powder in spray chamber；Meanwhile the blower through being connected with bag filter, by filtered indifferent gas
Body generates uniform and stable return air field by return air distributor, and the metal powder generated in spray chamber is taken away in time；
The metal powder of different-grain diameter is classified by two cyclone classifiers, metal powder is pneumatic by two after classification
The alternating of butterfly valve, which is opened, takes in powder tank for metal powder, completes preparation.
AlSi obtained is analyzed after tested7Mg product granularity is 15-53 μm, pattern as shown in figure 5, oxygen content 160PPm,
Mobility 48s/50g, apparent density 1.58g/cm3。
Embodiment 3:
By CuSn10Alloy pig is added in vacuum induction heating furnace；
By inflated with nitrogen in spray chamber and protective case, to guarantee transition tundish and be atomized indoor oxygen content as 3000PPm；
Melting outlet of still opening/closing device is opened, crucible metal bath being transported to by screw conveyor in transition tundish
In, stopper rod is driven by cylinder and is moved up and down in transition tundish, and metal bath is conveyed by bottom discharge spout under the effect of gravity
Onto the atomizing disk of underface, the molten metal degree of superheat is controlled by intermediate frequency power supply at 300 DEG C, and diameter of leting slip a remark is 3.0mm, flow
For 136Kg/h, drive atomization disc spins that metal bath is made to be atomized into molten drop with 36000rpm by motor, molten drop exists
Flight, cooling, solidification form powder in spray chamber；Meanwhile the blower through being connected with bag filter, by filtered indifferent gas
Body generates uniform and stable return air field by return air distributor, and the powder generated in spray chamber is taken away in time；
The metal powder of different-grain diameter is classified by two cyclone classifiers, the metal powder after classification passes through two gas
The alternating of dynamic butterfly valve, which is opened, takes in powder tank for metal powder, completes preparation.
CuSn obtained is analyzed after tested10Product granularity is 15-53 μm, and pattern is as shown in fig. 6, oxygen content 100PPm, stream
Dynamic property 16s/50g, apparent density 4.7g/cm3。
In conjunction with the embodiments 1-3 and attached drawing 4-6 it can be concluded that, using the device and method for preparing metal powder in the present invention
The metal powder being prepared is fine, narrow particle size distribution, good sphericity and good fluidity, apparent density are high, and operating cost
It is low, can continuous industrial production, be suitble to promote and apply.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (9)
1. a kind of centrifugal atomization apparatus for preparing increasing material manufacturing Al/Cu base alloy powder, which is characterized in that including atomising mechanism
And conveying mechanism, wherein the conveying mechanism includes transition tundish (5), stopper rod (7) and screw conveyor (8)；The atomization
Mechanism includes spray chamber (1), motor (2), atomizing disk (4) and cooling device (3)；Screw conveyor (8) the outlet end connection
The transition tundish (5), the transition tundish (5) are located above the spray chamber (1), and use Medium frequency induction device for
Transition tundish (5) heating, the stopper rod (7) is mounted on above transition tundish (5) bottom discharge spout, and passes through gas
Cylinder driving moves up and down, atomizing disk (4) described in the bottom discharge spout aligned beneath, and the cooling device (3) is the atomizing disk
(4) and/or the motor (2) provides cooling.
2. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 1, feature exist
In the transition tundish (5) is external to be equipped with protective case (6), and forms accommodating space between the two, the screw conveyor (8)
Outlet end passes through the crucible set in the protective case (6) and the transition tundish (5) and connect.
3. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 1, feature exist
In the screw conveyor (8) is single screw extrusion machine or double screw extruder, and the screw conveyor (8) is equipped with temperature
Control unit and speed adjustment unit.
4. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 1, feature exist
In the cooling device (3) is the strong cold water jacket being set in around the motor (2) and/or is arranged in the atomizing disk (4) bottom
The equipment water jetting cooler in portion.
5. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 4, feature exist
In the atomizing disk (4) is square position, conical disc or spherical dishes, and disk diameter is 40-110mm, revolving speed 15000-60000r/
min；The material of the atomizing disk (4) is ceramics, graphite, molybdenum alloy, copper or stainless steel.
6. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 1, feature exist
In described device further includes control cabinet (17) and at least one smelting furnace (9), wherein the smelting furnace (9) is equipped with outlet and opens
It closes device (10), and the smelting furnace (9) is connect by the outlet opening/closing device (10) with the screw conveyor (8) input end；
The control cabinet (17) is for controlling technological parameter.
7. the centrifugal atomization apparatus of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 1, feature exist
In, described device further include form closed cycle with the atomising device select sub-agencies, wherein the atomising device further includes
Return air distributor (11), it is described to select sub-agencies including receiving powder tank (14), bag filter (15), blower (16) and multiple whirlwind
Clasfficiator (12) and pneumatic dish valve (13), the multiple cyclone classifier (12) connects step by step, and multiple cyclone classifiers
(12) lower part passes through the multiple pneumatic dish valve (13) and connect with the receipts powder tank (14), and the return air distributor (11) is located at
Spray chamber (1) top, the cyclone classifier (12) using the bag filter (15) and blower (16) with it is described
Return air distributor (11) connection.
8. a kind of centrifugal atomizing method for preparing increasing material manufacturing Al/Cu base alloy powder, which is characterized in that use claim
The described in any item centrifugal atomization apparatus of 1-7, comprising the following steps:
(1) by filling with inert gas inside spray chamber and protective case, it is to guarantee transition tundish and be atomized indoor oxygen content
100-3000PPm；
(2) Al/Cu based alloy melt in smelting furnace is transported in the transition tundish by screw conveyor, and keeps one
Determine the degree of superheat；
(3) Al/Cu based alloy melt is transported on atomizing disk by bottom discharge spout in the transition tundish, flow 50-
200Kg/h, atomization form molten drop, and molten drop flies in spray chamber, cools down, solidifies and forms powder；Meanwhile Jing Yubu
The connected blower of bag dust collector, generates uniform and stable return air field by return air distributor for filtered inert gas, by mist
The metal powder for changing indoor generation is taken away in time；
(4) the Al/Cu base alloy powder of different-grain diameter is classified, is collected, complete preparation.
9. the centrifugal atomizing method of preparation increasing material manufacturing Al/Cu base alloy powder according to claim 8, feature exist
In in step (2), the degree of superheat of Al/Cu based alloy melt is 100-400 DEG C in the transition tundish.
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Cited By (3)
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| CN116673464A (en) * | 2023-08-02 | 2023-09-01 | 长春电子科技学院 | Cooling device for casting piece in transmission case |
| CN116748520A (en) * | 2023-08-21 | 2023-09-15 | 季华实验室 | Centrifugal atomizing equipment for aluminum alloy |
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