CN102861919B - Plasma ultrasonic gas atomization titanium-based powder and preparation method thereof - Google Patents
Plasma ultrasonic gas atomization titanium-based powder and preparation method thereof Download PDFInfo
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- CN102861919B CN102861919B CN201210356154.5A CN201210356154A CN102861919B CN 102861919 B CN102861919 B CN 102861919B CN 201210356154 A CN201210356154 A CN 201210356154A CN 102861919 B CN102861919 B CN 102861919B
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- titanium
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Abstract
The invention relates to plasma ultrasonic gas atomization titanium-based powder and a preparation method thereof. The preparation method includes making raw materials into bars, melting, atomization, cooling, screening and the like. The plasma ultrasonic gas atomization titanium-based powder is spherical powder with particle size lower than 75 micrometers. By using a plasma power supply to heat and melt, current and voltage of the plasma power supply are adjustable, size of each molten drop of melting titanium-based materials can be controlled in a range from 1mm to 3mm, and particle size of the titanium-based powder can be well controlled. Two Laval nozzle sets which are parallel are used as atomization nozzles, so that speed of airflow can reach 1-3mach, particle size of the titanium-based powder can be controlled lower than 75 micrometers, powder with particle size of 45 micrometers accounts for 35-55% after adjustments, and the current industry and market requirements can be fully satisfied.
Description
Technical field
Present invention belongs to powder metallurgy industry technical field, is related to one kind and is used for producing matrix powder (spherical powder)
Process and products thereof.
Background technology
The method of this area production matrix powder (spherical powder) has three kinds, that is, at present：Rotary electrode method, sensing gas atomization
Method and explosive forming method.Due to some each existing defects, the powder-product produced using these methods is in much sides
Face all can not meet the demand in industry and market now.
1st, rotary electrode method：The method dynamic sealing problem during producing matrix powder is difficult to solve, because of titanium-based bar
To be rotated with 20000 revs/min, axle envelope is worn soon, to admitting air into melting chamber, causes hydrogen, the oxygen content of powder
Increase and make powder-product difficult quality guarantee.The granularity of the powder that another the method is produced is thicker, and its granularity both greater than 75 is micro-
Rice, and industrial desired particle size is 75 microns to 5 microns at present, the granularity of matrix powder as required by heat and other static pressuring processes is
It is more than 20 microns less than 75 microns, the granularity requiring matrix powder in rocket assist agent application aspect is less than 45 microns, therefore
It does not adapt to the requirement in modern industry and market.This is also the disadvantage of the method.
2nd, sense gas atomization;The method atomization valve during producing matrix powder is easy to be melted molten metal
Drip blocking and cannot normal work, another the method to produce when air pressure, tolerance requirement very high, air pressure will be in 5MP～10MP
Scope, tolerance will have 3 cubes per second about, and the link controlling is also a lot, 300 microns in the granularity of the powder that gas is produced
To 45 microns, but 300 microns to 75 microns just account for 90%, therefore nor meet the requirement in modern industry and market.
3rd, explosive forming method：The method requirement blast interior during producing titanium-based powder is necessary for high negative pressure and just can enter
OK, have high requirement to the vacuum of equipment, and every stove at most can only produce 50kg, after the completion of also need to take out high negative pressure again, no
Possesses the condition of industrialized production.Though in product granularity the method than on two methods much better, be 200 microns micro- to 15
Rice (wherein 200 microns to 75 microns is 65%, and 75 microns to 15 microns is 35%), but still can not meet modern industry and market
Requirement.
Content of the invention
It is an object of the invention to all shortcomings overcoming above-mentioned three kinds of prior arts to exist, provide a kind of process line first
Enter reliability, production efficiency is high, product quality is easily controllable and can fully meet modern industry and the plasma of market demands surpasses
The preparation method of sound gas atomization matrix powder, the present invention is also and offer is a kind of simultaneously prepares, by the method, the product producing
Plasma ultrasonic gas atomization matrix powder.
For achieving the above object and provide plasma ultrasonic gas atomization matrix powder preparation method include under
The technical process stated：
Raw material system rod：Make diameter of phi=16～20 from greater than or equal to the titanium sponge of GB TA2 grade or pure titanium material
The pole material of millimeter；
Fusing：By the pole making material put in be filled with the spray chamber of argon gas, with power be 15～25 kilowatts, voltage be
5～60 volts of plasma power supply heating fusing, is raised above after titanium melting temperature after Indoor Temperature, raw material is melt a diameter of for molten drop
1～3 millimeter of liquid titanium；
Atomization：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, and air velocity is 1～3
The inert blowing gas of Mach hit liquid titanium, so that liquid titanium is scattered granulating；
Cooling, screening：Granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based
Powder, recycles bolting matrix powder, screens out the spherical powder that granularity is less than 75 microns, as product.
In being embodied as, the preparation method of plasma ultrasonic gas atomization matrix powder of the present invention can adopt following
Technical process carry out：(1), raw material system rod：The sponge titanium material of GB TA2 grade is made the pole of diameter of phi=20 millimeter
Material；(2), melt：By the pole making material put in be filled with the spray chamber of argon gas, with power be 25 kilowatts, voltage be 5～60
The plasma power supply heating fusing of volt, is raised above after titanium melting temperature after Indoor Temperature, raw material is melt as a diameter of 1 millimeter of molten drop
Liquid titanium；(3), it is atomized：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, air velocity
Inert blowing gas for mach one hit liquid titanium, so that liquid titanium is scattered granulating；(4), cooling, screening：Granular liquid titanium is dripped
Inserting makes it solidify in argon filling medium tank to be cooled to room temperature, obtains matrix powder, recycles bolting matrix powder, screening
Go out the powder that granularity is less than 75 microns, as product.
In being embodied as, the preparation method of plasma ultrasonic gas atomization matrix powder of the present invention may also be employed down
The technical process stated is carried out：(1), raw material system rod：The sponge titanium material of GB TA2 grade is made the circle of diameter of phi=20 millimeter
Bar；(2), melt：By the pole making material put in be filled with the spray chamber of argon gas, with power be 20 kilowatts, voltage be 5～
60 volts of plasma power supply heating fusing, is raised above after titanium melting temperature after Indoor Temperature, and raw material is melt as a diameter of 2 millis of molten drop
The liquid titanium of rice；(3), it is atomized：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, gas velocity
Spend the inert blowing gas for 1.5 Mach and hit liquid titanium, so that liquid titanium is scattered granulating；(4), cooling, screening：By granular liquid
Titanium drips to insert to be made it solidify in argon filling medium tank to be cooled to room temperature, obtains matrix powder, recycles bolting matrix powder,
Screen out the powder that granularity is less than 75 microns, as product.
In being embodied as, the preparation method of plasma ultrasonic gas atomization matrix powder of the present invention also can adopt down
The technical process stated is carried out：(1), raw material system rod：The sponge titanium material of GB TA2 grade is made the circle of diameter of phi=20 millimeter
Bar；(2), melt：By the pole making material put in be filled with the spray chamber of argon gas, with power be 15 kilowatts, voltage be 5～
60 volts of plasma power supply heating fusing, is raised above after titanium melting temperature after Indoor Temperature, and raw material is melt as a diameter of 3 millis of molten drop
The liquid titanium of rice；(3), it is atomized：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, gas velocity
Spend the inert blowing gas for 3 Mach and hit liquid titanium, so that liquid titanium is scattered granulating；(4), cooling, screening：By granular liquid titanium
Dripping to insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtains matrix powder, recycles bolting matrix powder, sieve
Separate the powder that granularity is less than 75 microns, as product.
It is that a kind of granularity is less than 75 microns according to the plasma ultrasonic gas atomization matrix powder of above-mentioned each method preparation
Spherical matrix powder.
In technical process of the present invention, in fusing two steps of atomization, the adjustment of either step is all available
Almost (adjusting isoionic power can make droplet size be controlled to identical product, and adjustment air velocity also can get equally
Result).
Compared with existing similar technique, present invention employs plasma power supply heating fusing mode, the electricity of plasma power supply
Stream, voltage is adjustable, using its be able to by titanium base material fusing when molten drop size dimension control in 1 millimeter to 3 millimeters scope
Interior continuously adjustabe, thus reaching the granularity to matrix powder have goodish control, has used two groups in terms of atomization valve simultaneously
And to the convergent-divergent channel arranging so that air velocity reaches more than the velocity of sound or the velocity of sound (1～3 Mach), so that matrix powder
Within 75 microns, adjusted latter 45 microns of powder can account for 35%～55% to Task-size Controlling, is the highest of current matrix powder
(5000 yuans of per kilograms of current 45 microns of matrix powder international market prices, so also can bring abundant economy to level
Benefit and social benefit).The present invention can be with requiring adjustment droplet size and adjustment air velocity to reach difference according to different simultaneously
The requirement of index, and 1MP to 1.3MP is only needed on supply gas pressure, about 3 cubes of gas flow is per minute, revolutionizes former
With the presence of all shortcomings of three kinds of methods, so that matrix powder is fully achieved the demand in industry and market at present.
Specific embodiment
Below with reference to embodiment, present invention is described further, but the practical application form of the present invention not only
It is limited to following embodiments.
Embodiment 1
The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；By pole material put in be filled with
In the spray chamber of argon gas, with power be 25 kilowatts, voltage be 5～60 volts plasma power supply heating fusing, treat that Indoor Temperature rises to
After exceeding titanium melting temperature, raw material is melt the liquid titanium for a diameter of 1 millimeter of molten drop；By two groups and to the convergent-divergent channel arranging
The inert blowing gas that nozzle ejection pressure is 1～1.3MPa (10kg～13kg), air velocity is mach one hit liquid titanium, make liquid
State titanium scatters granulating, and granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based powder
End, recycles bolting matrix powder, and gained powder size is：Powder less than 75 microns reaches 100%, wherein 45 microns
Following powder accounts for 55%.
Embodiment 2
The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；By pole material put in be filled with
In the spray chamber of argon gas, with power be 20 kilowatts, voltage be 5～60 volts plasma power supply heating fusing, treat that Indoor Temperature rises to
After exceeding titanium melting temperature, raw material is melt the liquid titanium for a diameter of 2 millimeters of molten drop；By two groups and to the convergent-divergent channel arranging
Nozzle spray pressure be 1～1.3MPa, air velocity be that 1.5 Mach of inert blowing gas hit liquid titanium, so that liquid titanium is scattered
Granulation, granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain matrix powder, and recycling is shaken
Dynamic sieve sieves matrix powder, and the granularity of gained matrix powder is：Powder less than 75 microns reaches 100%, wherein less than 45 microns
Powder accounts for 45%.
Embodiment 3
The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；By pole material put in be filled with
In the spray chamber of argon gas, with power be 15 kilowatts, voltage be 5～60 volts plasma power supply heating fusing, treat that Indoor Temperature rises to
After exceeding titanium melting temperature, raw material is melt the liquid titanium for a diameter of 3 millimeters of molten drop；By two groups and to the convergent-divergent channel arranging
Nozzle spray pressure be 1～1.3MPa, air velocity be that 3 Mach of inert blowing gas hit liquid titanium, so that liquid titanium is scattered particle
Change, granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtains matrix powder, recycles vibration
Sieve sieves matrix powder, and the granularity of gained matrix powder is：Powder less than 75 microns reaches 100%, wherein less than 45 microns of powder
End accounts for 35%.
Claims (5)
1. a kind of preparation method of plasma ultrasonic gas atomization matrix powder is it is characterised in that include following technical process：
Raw material system rod：Make diameter of phi=16～20 millimeter from greater than or equal to the titanium sponge of GB TA2 grade or pure titanium material
Pole material；
Fusing：By the pole making material put in be filled with the spray chamber of argon gas, with power be 15～25 kilowatts, voltage be 5～
60 volts of plasma power supply heating fusing, is raised above after titanium melting temperature after Indoor Temperature, raw material be melt for molten drop a diameter of 1～
3 millimeters of liquid titanium；
Atomization：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, and air velocity is 1～3 Mach
Inert blowing gas hit liquid titanium, so that liquid titanium is scattered granulating；
Cooling, screening：Granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based powder
End, recycles bolting matrix powder, screens out the spherical powder that granularity is less than 75 microns, as product.
2. the preparation method of plasma ultrasonic gas atomization matrix powder according to claim 1 is it is characterised in that include
Following technical process：
Raw material system rod：The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；
Fusing：By the pole making material put in be filled with the spray chamber of argon gas, with power be 25 kilowatts, voltage be 5～60 volts
Plasma power supply heating fusing, be raised above after titanium melting temperature after Indoor Temperature, raw material is melt as a diameter of 1 millimeter of molten drop
Liquid titanium；
Atomization：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, and air velocity is mach one
Inert blowing gas hit liquid titanium, so that liquid titanium is scattered granulating；
Cooling, screening：Granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based powder
End, recycles bolting matrix powder, screens out the powder that granularity is less than 75 microns, as product.
3. the preparation method of plasma ultrasonic gas atomization matrix powder according to claim 1 is it is characterised in that include
Following technical process：
Raw material system rod：The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；
Fusing：By the pole making material put in be filled with the spray chamber of argon gas, with power be 20 kilowatts, voltage be 5～60 volts
Plasma power supply heating fusing, be raised above after titanium melting temperature after Indoor Temperature, raw material is melt as a diameter of 2 millimeters of molten drop
Liquid titanium；
Atomization：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, and air velocity is 1.5 Mach
Inert blowing gas hit liquid titanium, so that liquid titanium is scattered granulating；
Cooling, screening：Granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based powder
End, recycles bolting matrix powder, screens out the powder that granularity is less than 75 microns, as product.
4. the preparation method of plasma ultrasonic gas atomization matrix powder according to claim 1 is it is characterised in that include
Following technical process：
Raw material system rod：The sponge titanium material of GB TA2 grade is made the pole material of diameter of phi=20 millimeter；
Fusing：By the pole making material put in be filled with the spray chamber of argon gas, with power be 15 kilowatts, voltage be 5～60 volts
Plasma power supply heating fusing, be raised above after titanium melting temperature after Indoor Temperature, raw material is melt as a diameter of 3 millimeters of molten drop
Liquid titanium；
Atomization：By two groups and spraying pressure to the convergent-divergent channel nozzle of setting is 1～1.3MPa, and air velocity is 3 Mach
Inert blowing gas hit liquid titanium, so that liquid titanium is scattered granulating；
Cooling, screening：Granular liquid titanium being dripped insert makes it solidify in argon filling medium tank to be cooled to room temperature, obtain titanium-based powder
End, recycles bolting matrix powder, screens out the powder that granularity is less than 75 microns, as product.
5. the plasma ultrasonic gas atomization matrix powder according to claim 1 or the preparation of 2 or 3 or 4 methods describeds, its feature exists
It is the spherical matrix powder that a kind of granularity is less than 75 microns in described matrix powder.
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| CN201210356154.5A CN102861919B (en) | 2012-09-21 | 2012-09-21 | Plasma ultrasonic gas atomization titanium-based powder and preparation method thereof |
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| CN201210356154.5A CN102861919B (en) | 2012-09-21 | 2012-09-21 | Plasma ultrasonic gas atomization titanium-based powder and preparation method thereof |
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| CN103273070B (en) * | 2013-06-03 | 2015-08-05 | 南京雷瑞新材料科技有限公司 | A kind of adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle |
| CN103433499B (en) * | 2013-08-27 | 2015-08-12 | 湖南航天工业总公司 | A kind of ultrasonic atomizatio preparation facilities of globular metallic powder and preparation method |
| CN104308168B (en) * | 2014-09-28 | 2016-04-13 | 陕西维克德科技开发有限公司 | The preparation method of a kind of fine grain hypoxemia spherical titanium and titanium alloy powder |
| CN107052354B (en) * | 2017-06-13 | 2019-04-12 | 河北工业大学 | A kind of device and method preparing high sphericity 3D printing refractory metal powder |
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| US5084091A (en) * | 1989-11-09 | 1992-01-28 | Crucible Materials Corporation | Method for producing titanium particles |
| CN1191141C (en) * | 2000-04-26 | 2005-03-02 | 刘学晖 | Ultrasonic atomization of low-oxygen titanium with high-purity gas andtitanium alloy powder preparing process and product thereof |
| CN1172762C (en) * | 2000-07-18 | 2004-10-27 | 包头华美稀土高科有限公司 | Atomizing pulverization technology and apparatus by high-power high-frequency electromagnetic oscillasion |
| CN1422718A (en) * | 2001-12-04 | 2003-06-11 | 北京有色金属研究总院 | Method and apparatus for making globular metallic powder by ultrasonic atomising |
| JP4504775B2 (en) * | 2004-10-04 | 2010-07-14 | 日本アトマイズ加工株式会社 | Conductive paste |
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