CN107470644A - A kind of atomization production of nickel aluminium powder - Google Patents
A kind of atomization production of nickel aluminium powder Download PDFInfo
- Publication number
- CN107470644A CN107470644A CN201710575823.0A CN201710575823A CN107470644A CN 107470644 A CN107470644 A CN 107470644A CN 201710575823 A CN201710575823 A CN 201710575823A CN 107470644 A CN107470644 A CN 107470644A
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- Prior art keywords
- melt
- atomization
- swirl atomizer
- crucible
- pulsed fashion
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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
Abstract
The invention discloses a kind of atomization production of nickel aluminium powder, including vacuumizing, heat melting, subsequent melt is directed in swirl atomizer, swirl atomizer starts centrifugal rotation, inert gas nozzle sprays argon gas simultaneously, the magnetic valve open and close in a pulsed fashion of leakage fluid dram on the swirl atomizer of control system control simultaneously, melt is set to be thrown out of in a pulsed fashion, make the equal face atomization gas emission direction of liquid stream ejected every time, melt and atomization gas frontal impact, fine droplet is ground under airflow function, and cooled and solidified is fine powder, subsequently enter collecting chamber, collected after being separated by cyclone separator after vibratory sieve sieves.
Description
Technical field
The invention belongs to materials processing technology field, more particularly, to a kind of atomization production of nickel aluminium powder.
Background technology
Intermetallic compound Ni3Al is the yield strength-temperature effect for possessing abnormality, and very high wear-resistant and resistance to
Corrosive nature, have become the important feature material in the fields such as contemporary aerospace industry, civilian industry, particularly sent out in aviation
Motivation blade industry has broad application prospects.3D printing, or increasing material manufacturing is as a kind of fast rapid-result of rising in recent years
Type technique, using successively powdering, laser or electron beam melt the mode being molded, and realize the finishing shaping of precise part, and
And the defects of avoiding the shrinkage cavity shrinkage porosity of casting process appearance, turn into a kind of emerging material manufacturing process.
Powder used in 3D printing at present, typically simultaneously used into ingot casting, subsequent secondary smelting by vacuum pouring after melting
The mode of atomization legal system powder is obtained, and in current atomization method, after typically being flowed directly out using metal bath, melt is blown
Realize atomization.The more advanced technique in part is atomized after then melt is thrown away using centrifugal process, and during being thrown away using centrifugation,
Inventor it has been investigated that, what melt threw away gas in rear atomization process blows speed, angle, and the direction of liquid stream is to the effect of atomization
Have an impact with the granularity of powder after atomization, but current centrifuging process is after continuous centrifugal goes out liquid by the way of blowing, because
And make obtained powder particles skewness.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of atomization production of nickel aluminium powder.
Complete technical scheme of the invention includes：
A kind of atomization production of nickel aluminium powder, the alloy with required component for first obtaining cast after vacuum melting
Ingot casting, it is put in the crucible of vacuum induction melting furnace, is subsequently vacuumed out to 10-3Vacuum induction heating coil power supply is opened after pa,
Heating power is 20KW, and crucible is preheated with relatively low power first, and thermocouple measures crucible temperature and reaches 1300 DEG C of left sides
When right, 5min is incubated, heating power is then increased to 30KW, the ingot casting in crucible is quickly heated, ingot casting is complete after about 20min
Running down,
Thermometric is carried out to alloy melt using infrared measurement of temperature equipment, made after being incubated 2-3min at 1800-2000 DEG C of melt, with
After melt temperature is increased into 300 DEG C or so of the degree of superheat afterwards, melt is imported in liquid storage bag, then passes through ceramic mozzle guiding
Into swirl atomizer, swirl atomizer starts centrifugal rotation, while inert gas nozzle sprays the argon gas that pressure is 6-8MPa, passes through
The speedup stage makes swirl atomizer increase to 20r/min from 0r/min, and speedup phases-time is 12s, and the speedup stage terminates rear rotating speed
20r/min is maintained, while control system controls the magnetic valve open and close in a pulsed fashion of leakage fluid dram on swirl atomizer, makes
Melt is thrown out of in a pulsed fashion, and control system controls pulse-pressure device in t0+ 11.9s the moment starts, using 0.5s arteries and veins
Punching interval, 0.2s pulse widths carry out pulse-pressure, make the equal face atomization gas emission direction of liquid stream ejected every time, melt
With atomization gas frontal impact, fine droplet is ground under airflow function, and cooled and solidified is fine powder, subsequently enters collection
Room, collected after being separated by cyclone separator after vibratory sieve sieves.
The present invention is relative to the advantages of prior art：By centrifugal nozzle, alloy melt is got rid of with centrifugal
Go out, add the speed thrown away, thus bigger crushing force can be produced when being contacted with atomization air flow, improve crushing effect,
Suitable smelting temperature, soaking time, the degree of superheat are selected according to nickel alumin(i)um alloy feature, make it remain to keep suitable in atomization
Temperature, avoid freezing, while coordinate the optimization design of the technological parameters such as rational rotating speed, pulse width and interval, imitate atomization
Fruit is more preferable, more efficient.
Embodiment
With reference to embodiment, the present invention will be further described.
A kind of atomization production of nickel aluminium powder, the alloy with required component for first obtaining cast after vacuum melting
Ingot casting, it is put in the crucible of vacuum induction melting furnace, is subsequently vacuumed out to 10-3Vacuum induction heating coil power supply is opened after pa,
Heating power is 20KW, and crucible is preheated with relatively low power first, and thermocouple measures crucible temperature and reaches 1300 DEG C of left sides
When right, 5min is incubated, heating power is then increased to 30KW, the ingot casting in crucible is quickly heated, ingot casting is complete after about 20min
Running down, thermometric is carried out to alloy melt using infrared measurement of temperature equipment, made after being incubated 2-3min at 1800-2000 DEG C of melt, with
After melt temperature is increased into 300 DEG C or so of the degree of superheat afterwards, melt is imported in liquid storage bag, then passes through ceramic mozzle guiding
Into swirl atomizer, swirl atomizer starts centrifugal rotation, while inert gas nozzle sprays the argon gas that pressure is 6-8MPa, passes through
The speedup stage makes swirl atomizer increase to 20r/min from 0r/min, and the speedup stage terminates rear rotating speed and maintains 20r/min, simultaneously
Control system control swirl atomizer on leakage fluid dram magnetic valve open and close in a pulsed fashion, make melt in a pulsed fashion by
Throw away, the described speedup stage starts timing when starting, if the time that swirl atomizer starts moment is t0, the increasing of rotating speed stage rotating speed
Speed is 100r/min2, reach stabilized (steady-state) speed 20r/min, boost phase swirl atomizer corotating 2r, due to 2 leakage fluid drams after 12s
To be symmetrical, interval angles are 180 °, thus now each leakage fluid dram still face inert gas nozzle, control system control
Pulse-pressure device is in t0+ 11.9s the moment starts, and using the 0.5s pulse spacings, 0.2s pulse widths carry out pulse-pressure, make every
The secondary equal face atomization gas emission direction of liquid stream ejected, melt and atomization gas frontal impact, by powder under airflow function
Fine droplet is broken into, and cooled and solidified is fine powder, subsequently enters collecting chamber, is sieved after being separated by cyclone separator through vibratory sieve
After collect.
Device used in this method includes body of heater, working chamber, spray chamber and collecting chamber.
Described working chamber is located above body of heater, including crucible, and crucible is externally provided with sensing heating body, and stove is provided with above body of heater
Lid.
Dividing plate is provided between working chamber and spray chamber, liquid storage bag made of refractory material, institute are provided with described spray chamber
The a diameter of 20cm of liquid storage bag is stated, is highly 50cm, liquid storage bag is wrapped with heat-preservation cotton, and induction melting crucible bottom passes through mozzle
Described liquid storage bag is connected to, mozzle is provided with opening/closing mechanism, and liquid storage bag bottom connects swirl atomizer, institute by mozzle
The swirl atomizer stated is discoid, a diameter of 20cm, and the outside of the swirl atomizer is symmetrically provided with 2 leakage fluid drams, leakage fluid dram
A diameter of 2cm, leakage fluid dram opening direction are the tangential direction of disk, and leakage fluid dram is provided with and PLC control system dedicated radio link
Magnetic valve, the opening and closing of pulsed can be realized by control system, swirl atomizer surrounding is accordingly provided with 2 inertia
Gas nozzle, leakage fluid dram melt throws away direction when inert gas nozzle direction face swirl atomizer rotates；Set below spray chamber
There is collecting chamber, cyclone separator and ultrasonic vibrating screen are provided with collecting chamber.
It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention
Any simple modification, change and the equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (1)
1. a kind of atomization production of nickel aluminium powder, the alloy with required component for first obtaining cast after vacuum melting is cast
Ingot, it is put in the crucible of vacuum induction melting furnace, is subsequently vacuumed out to 10-3Vacuum induction heating coil power supply is opened after pa, is added
Thermal power is 20KW, and crucible is preheated with relatively low power first, and thermocouple measures crucible temperature and reaches 1300 DEG C or so
When, 5min is incubated, heating power is then increased to 30KW, the ingot casting in crucible is quickly heated, ingot casting is complete after about 20min
Fusing,
Thermometric is carried out to alloy melt using infrared measurement of temperature equipment, made after being incubated 2-3min at 1800-2000 DEG C of melt, then will
After melt temperature is increased to 300 DEG C or so of the degree of superheat, will melt import liquid storage bag in, then pass through ceramic mozzle be directed to from
In heart nozzle, swirl atomizer starts centrifugal rotation, while inert gas nozzle sprays the argon gas that pressure is 6-8MPa, passes through speedup
Stage makes swirl atomizer increase to 20r/min from 0r/min, and speedup phases-time is 12s, and the speedup stage terminates rear rotating speed and maintained
In 20r/min, while control system controls the magnetic valve open and close in a pulsed fashion of leakage fluid dram on swirl atomizer, makes melt
It is thrown out of in a pulsed fashion, control system controls pulse-pressure device in t0+ 11.9s the moment starts, using between 0.5s pulses
Every 0.2s pulse widths carry out pulse-pressure, make the equal face atomization gas emission direction of liquid stream ejected every time, melt and mist
Change gas frontal impact, fine droplet is ground under airflow function, and cooled and solidified is fine powder, subsequently enters collecting chamber,
Collected after being separated by cyclone separator after vibratory sieve sieves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016112698719 | 2016-12-30 | ||
| CN201611269871 | 2016-12-30 |
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| CN107470644A true CN107470644A (en) | 2017-12-15 |
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| CN201710535664.1A Pending CN107377985A (en) | 2016-12-30 | 2017-07-04 | A kind of atomization preparing apparatus of nickel aluminium powder |
| CN201710575823.0A Pending CN107470644A (en) | 2016-12-30 | 2017-07-14 | A kind of atomization production of nickel aluminium powder |
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| CN108441654A (en) * | 2018-03-26 | 2018-08-24 | 苏州富博宏新材料科技有限公司 | A kind of processing hybrid technique being used for magnesium, titanium material |
| CN111283209A (en) * | 2019-12-24 | 2020-06-16 | 南京超旭节能科技有限公司 | Processing method for catalyst alloy |
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| CN1314224A (en) * | 2000-03-21 | 2001-09-26 | 贵研铂业股份有限公司 | Method and equipment for preparing noble metal and its alloy powder |
| CN100475390C (en) * | 2004-10-26 | 2009-04-08 | 上海申建冶金机电技术有限公司 | Method and apparatus for preparing rapid-solidified hydrogen-storage alloy powder material |
| CN205110799U (en) * | 2015-11-11 | 2016-03-30 | 广州纳联材料科技有限公司 | Centrifugal device and metal powder preparation facilities |
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2017
- 2017-07-04 CN CN201710535664.1A patent/CN107377985A/en active Pending
- 2017-07-14 CN CN201710575823.0A patent/CN107470644A/en active Pending
Patent Citations (8)
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| KR20020009668A (en) * | 2000-07-26 | 2002-02-02 | 정은 | method and apparatus for producing fine powder from molten liquid by high-pressure spray |
| JP2006213986A (en) * | 2005-02-07 | 2006-08-17 | Minerva Kiki Kk | Method for producing fine metallic powder and production apparatus therefor |
| JP2010209409A (en) * | 2009-03-10 | 2010-09-24 | Nec Tokin Corp | Method for producing amorphous soft magnetic alloy powder, amorphous soft magnetic alloy powder, and formed body using the same |
| CN101898249A (en) * | 2009-06-01 | 2010-12-01 | 北京有色金属研究总院 | Method for preparing flaky metal powder |
| CN102218539A (en) * | 2011-05-26 | 2011-10-19 | 江苏科技大学 | Method for preparing ultrafine silver powder |
| KR20140099145A (en) * | 2013-02-01 | 2014-08-11 | 일진전기 주식회사 | Supercooled powder production apparatus having cleaning apparatus for rotating cooling device |
| JP2014227591A (en) * | 2013-05-27 | 2014-12-08 | 相田化学工業株式会社 | Apparatus and method for producing metal fine powder |
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| CN107377985A (en) | 2017-11-24 |
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Application publication date: 20171215 |