CN109807339A - A kind of device and method preparing hypoxemia globular metallic powder - Google Patents
A kind of device and method preparing hypoxemia globular metallic powder Download PDFInfo
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- CN109807339A CN109807339A CN201711159020.3A CN201711159020A CN109807339A CN 109807339 A CN109807339 A CN 109807339A CN 201711159020 A CN201711159020 A CN 201711159020A CN 109807339 A CN109807339 A CN 109807339A
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- protection gas
- air inlet
- optical system
- powder
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- 239000000843 powder Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 25
- 206010021143 Hypoxia Diseases 0.000 title claims abstract description 16
- 208000018875 hypoxemia Diseases 0.000 title claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 89
- 239000007789 gas Substances 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 80
- 229910052751 metal Inorganic materials 0.000 claims abstract description 80
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000001301 oxygen Substances 0.000 claims abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 210000001367 artery Anatomy 0.000 claims 1
- 229910001882 dioxygen Inorganic materials 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 230000002463 transducing effect Effects 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention relates to a kind of device and method for preparing hypoxemia globular metallic powder, wherein the equipment includes: spray chamber, protection gas circulator, laser optical system, high-frequency vibration device and powder collector；The opposite sides face of spray chamber is respectively formed with air inlet and air outlet, and spray chamber bottom surface is formed with optical system placement hole close to the position of air inlet；The both ends of protection gas circulator are connected to the air inlet and air outlet of spray chamber；The bottom surface of spray chamber is arranged in laser optical system, and laser optical system can be entered radiating laser beams inside spray chamber by the optical system placement hole；The high-frequency vibration device is located inside spray chamber, is fixed on the laser beam irradiation that the surface of the metal bar on high-frequency vibration device can be issued by laser optical system；Powder collector is located at below spray chamber, and communicates inside spray chamber.The present invention has the advantages that fine powder obtains that powder rate is high, spherical powder oxygen content is low, empty celestial body and planet ball rate are low.
Description
Technical field
The invention belongs to field of preparing metal powder, and in particular to a kind of equipment for preparing hypoxemia globular metallic powder and side
Method, the preparation suitable for each metalloid material and ceramic material spherical powder.
Background technique
Globular metallic powder is the important raw material of metal increasing material manufacturing, in recent years as metal increases material manufacturing technology obtains
Quickly development and application, produce high-quality low-cost spherical metal powder become influence metal increases material manufacturing technology apply with
An important factor for promoted extension.The existing method for preparing globular metallic powder mainly has atomization, rotary electrode method and plasma
Nodularization method.Atomization is that metal melting is overcome molten metal surface tension with high velocity inert gas air-flow, molten metal is hit
It is broken into small molten drop, solidification forms globular metallic powder, and atomization is primarily present fine powder and obtains powder rate lower than 20%, oxygen content
Height, hollow sphere, planet ball, sphericity are low, high production cost, cannot prepare the problems such as refractory metal powder；Rotary electrode method
Big centrifugal force is generated using revolving speed high-speed rotary motor and overcomes molten metal surface tension, molten metal is broken into tiny liquid
Drop, solidification form globular metallic powder, rotary electrode method be primarily present fine powder obtain powder rate lower than 15%, high-melting-point gold cannot be prepared
The problems such as belonging to powder, do not have industrialized production ability also at present；Plasma spheroidization method is used to prepare metal powder, has fine powder
The advantages of powder rate is greater than 90% is obtained, but it is low oxygen activities metal that plasma spheroidization method, which prepares active metal and the raw material of alloy powder,
And alloy powder, and the more difficult acquisition of hypoxemia powder raw material, become the bottleneck that plasma spheroidization method prepares metal powder.
Summary of the invention
Low powder rate, rich oxygen content, row are obtained in order to solve fine powder present in above-mentioned existing globular metallic powder preparation method
The materials such as the very poor, materials with high melting point of celestial body, hollow sphere, sphericity be difficult into the technical problems such as powder and high production cost, equipment at
This high cost problem, the invention proposes a kind of device and method for preparing hypoxemia globular metallic powder.
A kind of equipment preparing hypoxemia globular metallic powder, the equipment include: spray chamber, protection gas circulator, laser
Device optical system, high-frequency vibration device and powder collector；
The opposite sides face of spray chamber is respectively arranged with air inlet and air outlet, and spray chamber bottom surface is close to the position of air inlet
It is provided with optical system placement hole；
The both ends of protection gas circulator are connected to the air inlet and air outlet of spray chamber, in protection gas circulator
The circulation canal of protection gas is formed with the inside of spray chamber；
The bottom surface of spray chamber is arranged in laser optical system, and laser optical system passes through the optical system placement hole
Radiating laser beams can be entered inside spray chamber；
The high-frequency vibration device is located inside spray chamber, and the high-frequency vibration device is capable of fixing installation metal bar, and
The laser beam irradiation that metal bar is mobile, and the surface of the metal bar after fixing can be issued by laser optical system can be controlled；
Powder collector is located at below spray chamber, and communicates inside spray chamber, and is located at laser optical system far from spray chamber
The side of air inlet.
Further, the protection gas circulator includes air inlet pipe, escape pipe and filter；
One end of air inlet pipe and the air inlet of spray chamber connect, and outer protection gas enters air inlet by the other end of air inlet pipe
Pipe, then enter inside spray chamber via the air inlet of spray chamber；One end of escape pipe is connected to the filter, the other end of escape pipe
It is connected to protection gas cycler；Described filter one end and the gas outlet of spray chamber connect, and the other end of filter connects
It is connected to escape pipe.
Further, protection gas cycler one end is connect with air inlet pipe, protection gas cycler
The other end is connect with escape pipe；The protection gas cycler is provided with exhaust apparatus.
Further, the protection gas circulator further includes protection gas inlet solenoid valve and vacuum pump, the institute of air inlet pipe
It states the other end and the protection gas inlet solenoid valve is set, vacuum pump is arranged on the pipeline of escape pipe.
Further, the high-frequency vibration device includes dither, energy converter, amplitude transformer and motion controller；
Dither exports energy to amplitude transformer through energy converter, and amplitude transformer is capable of fixing the installation metal bar, fortune
Movement controller can control the movement of metal bar.
Further, motion controller is Z axis motion controller, and motion controller is located at spray chamber inner upper, described
Amplitude transformer is fixed on the lower section of motion controller, is capable of fixing metal bar below the amplitude transformer, motion controller can control
Metal bar moves up and down.
Further, the laser optical system includes the pulse being sequentially placed or continuous wave laser, collimating mirror, vibration
Mirror, field lens and window mirror；
The window mirror is arranged in optical system placement hole, the collimated mirror of laser beam, the galvanometer, field lens of laser sending
Afterwards, enter inside spray chamber through window mirror, the laser beam uses small light spot pulse laser beam.
Further, the equipment for preparing hypoxemia globular metallic powder further include pressure sensor, oxygen sensor and
Nitrogen sensor, pressure sensor, oxygen sensor and nitrogen sensor are arranged inside spray chamber.
A method of hypoxemia globular metallic powder being prepared using such as preceding described in any item equipment, which includes
Following steps:
S1, the upper end of metal bar is threadedly coupled fixation with the amplitude transformer of high-frequency vibration device；
S2, circulation open the vacuum pump of protection gas circulator and protection gas inlet solenoid valve, protection gas are followed from protection gas
The air inlet pipe of loop device enters inside spray chamber, replaces spray chamber internal atmosphere, and oxygen content and nitrogen content is made to be lower than 10ppm,
Close the vacuum pump and protection gas inlet solenoid valve of protection gas circulator；
S3, the laser for opening laser optical system adjust laser power, sweep speed in 100-2000W
0.5-5m/s, scanning melting metal bar control pool depth at 10-500 μm；
S4, the dither for opening high-frequency vibration device adjust 20-100KHZ of vibration frequency, 5-50 μm of amplitude, will
The molten metal of metal bar lower end surface is vibrated away from metal bar, and is crushed and forms droplet, falls solidification, forms globular metallic powder；
S5, the protection gas cycler for opening protection gas circulator adjust air-flow flow rate, are atomized Indoor Air
Atmosphere circulates, and spherical powder is blown into powder collector, meticulous powder is blowed to the escape pipe of protection gas circulator
Filter；
The motion controller control metal bar of S6, every one layer of the melting of laser scanning, high-frequency vibration device move down a displacement, under
It is pool depth that displacement, which moves, until technique terminates.
Further, when oxygen content and nitrogen content are higher than setting value in spray chamber, gas air inlet pipe solenoid valve is protected
It automatically turns on, in spray chamber when superpressure, exhaust apparatus starting makes to be atomized indoor oxygen and nitrogen content lower than setting value.
Beneficial effects of the present invention:
1. laser processing is whole will not to introduce exogenous impurity pollution in high-purity protective atmosphere, and cooling velocity is up to 104—
108DEG C/s, processing fuel factor is small, and molten drop and metal bar are quickly cooled to room temperature, avoids spherical metal powder and continues
It being aoxidized under high temperature, spherical powder oxygen content is easy to control, the small feature of heated effluent field, and molten metal drop is quickly cooled down solidification,
It is cooled to room temperature in descent, reduces continued oxidation under powder metallurgy, be easy to get to the metal ball shaped powder of ground oxygen content；
2. laser machining, cooling velocity is fast, and metal bar heat affected area is small, avoids the high temperature continued oxidation of metal bar, equipment
Without doing heat-insulated protection, the protection difficulty of equipment is reduced；
3. using small light spot pulse laser beam molten metal stick, the single molten bath volume that single pulse laser generates can be accurate
Control, molten metal fall the spherical powder partial size for smashing solidification formation no more than molten bath volume, spherical powder grain by high frequency ultrasound vibration
Diameter is controllable in smaller range, and fine powder obtains powder rate greater than 90%；
4. overcoming interfacial tension and weld pool surface tension to be vibrated away from and be crushed using the tensile wave that ultrasonic high-frequency vibration generates to melt
Melt metal, without consuming a large amount of high purity inert gas, process energy consumption is low, considerably reduces being produced into for metal ball shaped powder
This；
5. multiple laser can be used to work at the same time, production efficiency is linearly improved, and equipment proposed by the present invention has extremely strong
Scalability；
6. without with high pressure, high purity inert gas be crushed molten drop, will not generate because gas be involved in molten drop formed it is hollow
Ball, drop falling direction is consistent, and falling speed is uniform, is not likely to produce planet ball；
7. laser fuseable melts refractory metal or ceramic material, refractory metal spherical powder, equipment suitable material can be prepared
Range is wide.
Detailed description of the invention
Fig. 1 is the device structure schematic diagram proposed by the present invention for preparing hypoxemia globular metallic powder.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.But those skilled in the art know, the invention is not limited to attached drawings and following
Embodiment.
A kind of equipment preparing hypoxemia globular metallic powder proposed by the present invention, as shown in Figure 1, the equipment includes: atomization
Room 1, protection gas circulator, laser optical system 5, high-frequency vibration device and powder collector 9.
The opposite sides face of spray chamber 1 is respectively formed with air inlet and air outlet, and air inlet and air outlet can distinguish shape
At in spray chamber 1 left and right sides or front and rear sides face.1 bottom surface of spray chamber is formed with optical system close to the position of air inlet
Placement hole.
The both ends of protection gas circulator are connected to the air inlet and air outlet of spray chamber 1, to follow in protection gas
The inside of loop device and spray chamber 1 forms the circulation canal of protection gas.
The bottom surface of spray chamber 1 is arranged in laser optical system 5, and laser optical system 5 is pacified by the optical system
Hole is set, radiating laser beams can be entered inside spray chamber 1.
The high-frequency vibration device is located inside spray chamber 1, and the high-frequency vibration device can fix metal bar 6, and make
The surface of metal bar 6 after must fixing can be irradiated by the laser beam that laser optical system 5 issues.
Powder collector 9 is located at the lower section of spray chamber 1, and communicates inside spray chamber 1, and is located at laser optical system 5 far from mist
Change the side of 1 air inlet of room.Powder collector 9 can be integrally formed structures with spray chamber 1, can also be to separate with spray chamber 1
Structure, powder collector 9 and spray chamber 1 are tightly connected.
Further, the protection gas circulator includes air inlet pipe 2 and escape pipe 10.
One end of air inlet pipe 2 is connect with the air inlet of spray chamber 1, and outer protection gas is entered by the other end of air inlet pipe 2
Air inlet pipe 2, then enter via the air inlet of spray chamber 1 inside of spray chamber 1.As known to those skilled in the art, air inlet pipe 2 and mist
Changing room 1 can be integrally formed structures, and can also be separated structure with spray chamber 1, and air inlet pipe 2 and spray chamber 1 are tightly connected.
Preferably, the other end of air inlet pipe 2 is provided with protection gas inlet solenoid valve, so as to control air inflow.
One end of escape pipe 10 is connect with the gas outlet of spray chamber 1, and the other end of escape pipe 10 is connected to air inlet pipe 2, from
And the protection gas entered inside spray chamber 1 is made to be recycled back to air inlet pipe 2, and be again introduced into inside spray chamber 1.
It is recycled back in the protection gas of air inlet pipe 2 in order to prevent and there is fine powder, the protection gas circulator further includes
Filter 3, the filter 3 are arranged inside escape pipe 10.Preferably, filter 3 is close to the gas outlet of spray chamber 1.
The protection gas circulator further includes protection gas cycler 4, and protection gas cycler 4 is located at
On the pipeline of tracheae 10, escape pipe 10 is separated into the front end pipeline along protection gas loop direction by protection gas cycler 4
And back end line.Protection gas cycler 4 can control 1 internal atmosphere of spray chamber and circulate.Preferably, the front end
Pipeline is different with the caliber of back end line, and the caliber of front end pipeline is bigger than the caliber of back end line.It is highly preferred that filter 3 is set
It sets between the gas outlet and protector cycler 4 of spray chamber 1.
Protection gas cycler 4 can be such that 1 internal atmosphere of spray chamber circulates, and can also protect gas by adjusting
Spherical powder is blown into powder collector 9 by airflow rate, and meticulous powder is blowed to escape pipe 10, is filtered through filter 3.
The protection gas cycler 4 is provided with exhaust apparatus 11, and protection gas can be discharged in exhaust apparatus 11, reduces
Pressure in spray chamber 1.
The protection gas circulator further includes vacuum pump, and vacuum pump is arranged on the pipeline of escape pipe, for circulation
Channel carries out vacuumize process.Before preparing metal powder, vacuum pump can guarantee with protection gas inlet solenoid valve cooperation
It is capable of forming high-purity protective atmosphere inside spray chamber 1, avoids the pollution of exogenous impurity.
The high-frequency vibration device includes dither, energy converter, amplitude transformer 7 and motion controller 8.Dither
For with the supersonic generator for chasing after frequency function automatically or other vibrators, dither exports energy to change through energy converter
Width bar 7.Metal bar 6 can be fixedly mounted in amplitude transformer 7.Motion controller 8 controls the movement of metal bar 6, when metal bar 6 is vertically pacified
When dress, motion controller 8 is Z axis motion controller, and motion controller 8 is located at 1 inner upper of spray chamber, and the amplitude transformer 7 is solid
It is scheduled on the lower section of motion controller 8, metal bar 6 can be fixed under the amplitude transformer 7, motion controller 8 can control metal bar 6
It moves up and down.Preferably, metal bar 6 is threadably secured with the amplitude transformer 7 and connect.
The laser optical system 5 includes the pulse being sequentially placed or continuous wave laser, collimating mirror, galvanometer, field lens
And window mirror.The window mirror is arranged in optical system placement hole.The collimated mirror of laser beam, the galvanometer, field of laser sending
After mirror, enter inside spray chamber 1 through window mirror.The laser beam preferably uses small light spot pulse laser beam, by using small light
Spot pulse laser beam molten metal stick 6, so that the single molten bath volume that single pulse laser generates can be precisely controlled, molten metal
The spherical powder partial size for smashing solidification formation is fallen no more than molten bath volume by high frequency ultrasound vibration, spherical powder size tunable system is smaller
In range, fine powder obtains powder rate greater than 90%.
Laser optical system 5 controls the movement of laser beam, makes the laser beam flying of transmitting to the lower end surface of metal bar 6,
The lower end surface of laser beam heats metal bar 6 makes to be heated face surface partial melting, thus 6 surface of metal bar formed it is continuous or
The small molten bath of quasi-continuous distribution, metal bar 6 do high-frequency vibration under the control of the amplitude transformer 7 of high-frequency vibration device, so that molten
The molten drop in pond overcomes solid-liquid interfacial tension to be detached from metal section, or surface tension is overcome to be smashed by ultrasonic wave, is formed tiny
Molten drop, fall down under the effect of gravity, fall during quickly solidification form fine powder particles, powder particle quilt
Air-blowing is protected to be sent into powder collector 9.
In order to be monitored to the situation inside spray chamber 1, the equipment for preparing hypoxemia globular metallic powder further includes
Pressure sensor 12, oxygen sensor 13 and nitrogen sensor 14, pressure sensor 12, oxygen sensor 13 and nitrogen sensor
14 are arranged inside spray chamber 1, it is preferable that pressure sensor 12, oxygen sensor 13 and the setting of nitrogen sensor 14 are being atomized
1 inner upper of room.
The tensile wave that equipment proposed by the present invention uses the high-frequency vibration not less than 20KHZ to generate, overcomes lesser metal
Solid-liquid interfacial tension and molten metal surface tension are prepared fine powder of the spherical metal powder partial size less than 60 microns and obtain powder
Rate is greater than low 90%, spherical powder oxygen content, empty celestial body and planet ball rate is low, sphericity is high, powder flowbility is good, suitable material model
It encloses wide, equipment and simple process is easy to operate, production cost is low.
The method for preparing hypoxemia globular metallic powder to the equipment below is illustrated.The preparation method mainly include with
Lower step:
S1, the upper end of metal bar 6 is threadedly coupled fixation with the amplitude transformer 7 of high-frequency vibration device；
S2, circulation open vacuum pump and protection gas inlet solenoid valve, and protection gas enters inside spray chamber 1 from air inlet pipe 2, sets
1 internal atmosphere of spray chamber is changed, makes oxygen content and nitrogen content lower than 10ppm, closes protection gas inlet solenoid valve；
S3, the laser for opening laser optical system 5 adjust laser power, sweep speed in 100-2000W
0.5-5m/s scanning melting metal bar 6 controls pool depth at 10-500 μm；
S4, unlatching have chases after the dither of frequency function automatically, adjusts 20-100KHZ of vibration frequency, and 5-50 μm of amplitude,
Solid-liquid interface tension and molten metal surface tension are overcome, by the molten metal of 6 lower end surface of metal bar fixed in amplitude transformer 7
It is vibrated away from metal bar 6, and is crushed and forms droplet, falls solidification, forms globular metallic powder；
S5, protection gas cycler 4 is opened, adjusts air-flow flow rate, atmosphere circulates in spray chamber 1, will
Spherical powder is blown into powder collector 9, and meticulous powder is blowed to the filter 3 inside escape pipe 10；
S6, every one layer of the melting of laser scanning, motion controller 8 control metal bar 6 and move down a displacement, and moving down displacement is molten bath
Depth, until technique terminates.The condition that technique terminates can be current metal bar 6 and melt, or current metal bar 6 is not
It has melted and entire preparation process completion.Current metal bar has melted, and can also reinstall new metal bar, continues preparation gold
Belong to powder.
Wherein, when oxygen content and nitrogen content are higher than 10ppm in spray chamber 1, protection gas air inlet pipe solenoid valve is automatic
It opens, in spray chamber 1 when superpressure, exhaust apparatus 11 starts, and oxygen and nitrogen content in spray chamber 1 is made to be lower than 10ppm.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of equipment for preparing hypoxemia globular metallic powder, which is characterized in that the equipment includes: spray chamber, protection gas circulation
Device, laser optical system, high-frequency vibration device and powder collector；
The opposite sides face of spray chamber is respectively formed with air inlet and air outlet, and spray chamber bottom surface is formed close to the position of air inlet
There is optical system placement hole；
The both ends of protection gas circulator are connected to the air inlet and air outlet of spray chamber, in protection gas circulator and mist
The inside for changing room forms the circulation canal of protection gas；
The bottom surface of spray chamber is arranged in laser optical system, and laser optical system can by the optical system placement hole
Radiating laser beams are entered inside spray chamber；
The high-frequency vibration device is located inside spray chamber, and the high-frequency vibration device is capable of fixing installation metal bar, and can
Control the laser beam irradiation that metal bar is mobile, and the surface of the metal bar after fixing can be issued by laser optical system；
Powder collector is located at below spray chamber, and communicates inside spray chamber, and is located at laser optical system far from spray chamber air inlet
The side of mouth.
2. equipment according to claim 1, which is characterized in that the protection gas circulator includes air inlet pipe, escape pipe
And filter；
One end of air inlet pipe and the air inlet of spray chamber connect, and outer protection gas enters air inlet pipe by the other end of air inlet pipe,
Enter inside spray chamber via the air inlet of spray chamber again；One end of escape pipe and the gas outlet of spray chamber connect, escape pipe
The other end is connected to air inlet pipe；The filter is arranged inside escape pipe.
3. equipment according to claim 2, which is characterized in that the protection gas circulator further includes protection gas circulation control
Device processed, protection gas cycler are located on the pipeline of escape pipe, and escape pipe is separated by protection gas cycler
Along the front end pipeline and back end line of protection gas loop direction；The gas outlet of spray chamber is arranged in the filter and protector follows
Between ring control device；The protection gas cycler is provided with exhaust apparatus.
4. equipment according to claim 3, which is characterized in that the protection gas circulator further includes protection gas import electricity
The protection gas inlet solenoid valve is arranged in the other end of magnet valve and vacuum pump, air inlet pipe, and escape pipe is arranged in vacuum pump
On pipeline.
5. equipment according to claim 4, which is characterized in that the high-frequency vibration device includes dither, transducing
Device, amplitude transformer and motion controller；
Dither exports energy to amplitude transformer through energy converter, and amplitude transformer is capable of fixing the installation metal bar, movement control
Device processed can control the movement of metal bar.
6. equipment according to claim 5, which is characterized in that motion controller is Z axis motion controller, motion controller
Positioned at spray chamber inner upper, the amplitude transformer is fixed on the lower section of motion controller, is capable of fixing gold below the amplitude transformer
Belong to stick, motion controller can control metal bar and move up and down.
7. equipment according to claim 6, which is characterized in that the laser optical system includes the arteries and veins being sequentially placed
Punching or continuous wave laser, collimating mirror, galvanometer, field lens and window mirror；
The window mirror is arranged in optical system placement hole, after the collimated mirror of laser beam that laser issues, galvanometer, field lens,
Enter inside spray chamber through window mirror, the laser beam uses small light spot pulse laser beam.
8. equipment according to claim 7, which is characterized in that the equipment for preparing hypoxemia globular metallic powder further includes
Pressure sensor, oxygen sensor and nitrogen sensor, pressure sensor, oxygen sensor and nitrogen sensor setting are being atomized
Chamber interior.
9. a kind of method for preparing hypoxemia globular metallic powder using such as equipment described in any item of the claim 1 to 8, special
Sign is, the preparation method the following steps are included:
S1, the upper end of metal bar is threadedly coupled fixation with the amplitude transformer of high-frequency vibration device；
S2, circulation open the vacuum pump and protection gas inlet solenoid valve of protection gas circulator, protect gas from protection gas circulation dress
The air inlet pipe set enters inside spray chamber, replaces spray chamber internal atmosphere, makes oxygen content and nitrogen content lower than 10ppm, closes
Protect the vacuum pump and protection gas inlet solenoid valve of gas circulator；
S3, the laser for opening laser optical system adjust laser power, 0.5-5m/ of sweep speed in 100-2000W
S, scanning melting metal bar control pool depth at 10-500 μm；
S4, open high-frequency vibration device dither, adjust 20-100KHZ of vibration frequency, 5-50 μm of amplitude, by metal
The molten metal of stick lower end surface is vibrated away from metal bar, and is crushed and forms droplet, falls solidification, forms globular metallic powder；
S5, the protection gas cycler for opening protection gas circulator, adjust air-flow flow rate, and atomization internal ambience follows
Circulation is dynamic, spherical powder is blown into powder collector, meticulous powder is blowed to the mistake inside the escape pipe of protection gas circulator
Filter；
The motion controller control metal bar of S6, every one layer of the melting of laser scanning, high-frequency vibration device move down a displacement, lower displacement
Moving is pool depth, until technique terminates.
10. according to the method described in claim 9, it is characterized in that, oxygen content and nitrogen content are higher than in spray chamber
When 10ppm, protection gas air inlet pipe solenoid valve is automatically turned on, and in spray chamber when superpressure, exhaust apparatus starting makes to be atomized indoor oxygen
Gas and nitrogen content are lower than 10ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159020.3A CN109807339B (en) | 2017-11-20 | Equipment and method for preparing low-oxygen spherical metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159020.3A CN109807339B (en) | 2017-11-20 | Equipment and method for preparing low-oxygen spherical metal powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109807339A true CN109807339A (en) | 2019-05-28 |
| CN109807339B CN109807339B (en) | 2024-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111390192A (en) * | 2020-04-26 | 2020-07-10 | 中国科学院宁波材料技术与工程研究所 | Equipment and method for preparing spherical metal micro powder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4774037A (en) * | 1986-09-26 | 1988-09-27 | The United States Of America As Represented By The United States Department Of Energy | Method for producing solid or hollow spherical particles of chosen chemical composition and of uniform size |
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