CN108059164A - Spherical TiC powder prepared by the plasma preparation method and this method of a kind of spherical shape TiC powder - Google Patents
Spherical TiC powder prepared by the plasma preparation method and this method of a kind of spherical shape TiC powder Download PDFInfo
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- CN108059164A CN108059164A CN201610977793.1A CN201610977793A CN108059164A CN 108059164 A CN108059164 A CN 108059164A CN 201610977793 A CN201610977793 A CN 201610977793A CN 108059164 A CN108059164 A CN 108059164A
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- tic powder
- tic
- plasma
- spherical shape
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
Abstract
The present invention provides a kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：1) the TiC powder particles that grain size is 40um to 200um are chosen；2) plasma ignition is carried out；3) after lighting a fire successfully, air pressure and gas flow in adjustment control reaction vessel establish stable argon gas hydrogen gas plasma；4) argon gas carrying TiC powder particles enter plasma, and the TiC drops of melting are made；5) the TiC drops cooling and solidifying of melting, that is, be made spherical shape TiC powder.The present invention also provides a kind of spherical TiC prepared by above-mentioned preparation method.It is not easy to vaporize and do not dispelled onto equipment inner wall in the process the present invention provides a kind of TiC spheres of powder rate height, system, and can effectively control the dispersiveness of particle, making it, mutually collision is not bonded.
Description
Technical field
The present invention relates to metal powder preparing technical fields, especially relate to a kind of plasma preparation method of spherical shape TiC powder
And spherical TiC powder prepared by this method.
Background technology
TiC fusing points are high, bowl degree is high, chemical stability is good, are mainly used to manufacture cermet, heat-resisting alloy and hard close
Gold.The complex phase compound material that can also be prepared with carbonization TiC is in fields such as mechanical processing, metallurgical mineral products, space industry, fusion reactors
It has a wide range of applications.
In field of powder metallurgy, spherical TiC is due to its good fluidity, even particle size distribution so that is carrying out compound batch mixing
And there is very big development and application in the fields such as coating.At present the preparation method of spherical carbide TiC powder still using traditional handicraft as
It is main, but its impurity is more, Oxygen potential is relatively low.
Radio frequency plasma powder spheronization techniques have temperature is high, pollution less, atmosphere is adjustable controllable, simple operation and other advantages.
Since TiC powder fusing point is high, but quality hydrogen, in general radio frequency plasma technology in order to ensure the starting the arc of plasma torch and steady
Fixed, wherein gas and side throughput is larger, and powder is caused to be present with serious vaporization phenomenon in melting and is largely dispelled, attached
It in cavity wall and fine powder collecting tank, obtains its yield very low, and repeatedly have substantial amounts of powder after production and be bonded in
On gas ions torch, cause the unstable of power, be sticked on wall, cause cooling effect and heat-transfer effect degradation, damage is set
It is standby.
It is not easy to vaporize and do not dispelled onto equipment inner wall in a kind of Oxygen potential height, preparation process for this reason, it may be necessary to provide
The preparation method of spherical TiC powder.
The content of the invention
It is above-mentioned technical problem to solve, what the present invention was realized in：
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 40um to 200um are chosen；
2) plasma ignition is carried out；
3) after lighting a fire successfully, adjustment control reaction vessel in air pressure and gas flow, establish stable argon gas-hydrogen etc. from
Daughter so that TiC powder particles are not in vaporization when melting and are not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, and the TiC drops of melting are made；
5) the TiC drops cooling and solidifying of melting, that is, be made spherical shape TiC powder.
Preferably, the operating parameter of step 2) plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon flow amount
For 5L/min to 40L/min；Side gas argon flow amount is 20L/min to 80L/min.
Side gas of the present invention is two kinds of gases of hydrogen and argon gas, and the two comprehensive function maintains plasma torch, and hydrogen has
The effect of heat transfer reaches and preferably prepares effect.
Preferably, the plasma rf power for molten Ti C powder particles described in step 3) is 5KW to 40KW.
Preferably, air pressure and gas flow specifically include in step 3) adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 5psia to 20psia, and middle gas argon flow amount is adjusted to 5L/min to 20L/min, and side gas argon flow amount is adjusted to 20L/min extremely
40L/min, side gas hydrogen flowing quantity are 0L/min to 30L/min.
Preferably, the flow that step 4) carries argon gas used in TiC powder particles is 1L/min to 11L/min.
Preferably, the feed rate that step 4) TiC powder particles enter plasma is 1kg/h to 10kg/h.
Preferably, the TiC drops of step 5) melting cool and solidify in cooling storehouse, and cooling storehouse is that logical recirculated water is cooled down
Equipment or device.
Preferably, the cooling storehouse provides 50 DEG C to 80 DEG C of temperature environment for the TiC drops of melting.
A kind of spherical shape TiC powder, spherical shape TiC powder by any of the above-described spherical TiC powder plasma preparation method
It is prepared.
The invention has the advantages that：TiC spheres of powder rate is high, is not easy to vaporize and do not dispelled into equipment in preparation process
On wall, and the dispersiveness of particle can be effectively controlled, making it, mutually collision is not bonded, and obtains high recovery rate.
Description of the drawings
Relational graph in Fig. 1 gas flows and container between air pressure；
Fig. 2 plasmas prepare the schematic device of spherical shape TiC powder.
Specific embodiment
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is coordinated to be explained in detail.
Embodiment 1
Air pressure and gas flow in present invention adjustment control reaction vessel, are mainly based upon in gas flow and reaction vessel
Two parameters of air pressure are (as shown in Figure 1) to carry out comprehensive adjustment.Inventor has found that traditional method is establishing plasma
After, air pressure and gas flow in control reaction vessel are not adjusted, and nodularization preparation is directly carried out, so it is easy to cause TiC
The sphere of powder is easily vaporized and easily dispelled onto equipment inner wall.Inventor it is creative after plasma igniting, and comprehensive hold
Air pressure and gas flow are adjusted in device so that the TiC spheres of powder are not easy to vaporize and do not dispelled onto equipment inner wall.
Embodiment 2
The schematic diagram of experimental provision as shown in Fig. 2, be made of following sections, plasma reactor system, that is, wait from
Daughter generator, for generating excitation electromagnetic field；Plasma torch, inside be connected with while gas argon gas and while gas hydrogen and middle gas argon
Gas；Powder feed system and feeding gun；Vacuum cavity；It is water-cooled, stainless steel material collecting device, tail gas discharge system.Above device, only
Only it is a kind of mounted cast of the present invention, does not limit a kind of this preparation facilities, it is every to prepare spherical shape TiC powder original using the present invention
The device of reason is scope of protection of the present invention.
Embodiment 3
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 40um to 50um are chosen；
2) plasma ignition is carried out；The operating parameter of plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon gas
Flow is 5L/min；Side gas argon flow amount is 20L/min；
3) after lighting a fire successfully, air pressure and gas flow specifically include in adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 5psia, and middle gas argon flow amount is adjusted to 5L/min, and side gas argon flow amount is adjusted to 20L/min, and side gas hydrogen flowing quantity is 30L/
min；Establish stable argon gas-hydrogen gas plasma, radio-frequency power 5KW so that TiC powder particles are not in vaporization when melting
And it is not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, carry the flow of argon gas used in TiC powder particles as 1L/min,
TiC powder particles enter the feed rate of plasma for 1kg/h, and the TiC drops of melting are made；
5) the TiC drops of melting cool and solidify in 80 DEG C of cooling storehouse, that is, spherical shape TiC powder is made.
A kind of spherical shape TiC powder, spherical shape TiC powder are prepared by the plasma preparation method of spherical TiC powder described above
It forms.
Embodiment 4
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 85um to 95um are chosen；
2) plasma ignition is carried out；The operating parameter of plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon gas
Flow is 15L/min；Side gas argon flow amount is 30L/min；
3) after lighting a fire successfully, air pressure and gas flow specifically include in adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 8psia, and middle gas argon flow amount is adjusted to 7L/min, and side gas argon flow amount is adjusted to 24L/min, and side gas hydrogen flowing quantity is 23L/
min；Establish stable argon gas-hydrogen gas plasma, radio-frequency power 14KW so that TiC powder particles are not in vapour when melting
Change and do not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, carry the flow of argon gas used in TiC powder particles as 3L/min,
TiC powder particles enter the feed rate of plasma for 3kg/h, and the TiC drops of melting are made；
5) the TiC drops of melting cool and solidify in 70 DEG C of cooling storehouse, that is, spherical shape TiC powder is made.
A kind of spherical shape TiC powder, spherical shape TiC powder are prepared by the plasma preparation method of spherical TiC powder described above
It forms.
Embodiment 5
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 115um to 125um are chosen；
2) plasma ignition is carried out；The operating parameter of plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon gas
Flow is 25L/min；Side gas argon flow amount is 45L/min；
3) after lighting a fire successfully, air pressure and gas flow specifically include in adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 12psia, and middle gas argon flow amount is adjusted to 12L/min, and side gas argon flow amount is adjusted to 29L/min, and side gas hydrogen flowing quantity is
15L/min；Establish stable argon gas-hydrogen gas plasma, radio-frequency power 26KW so that TiC powder particles will not go out when melting
It now vaporizes and is not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, carry the flow of argon gas used in TiC powder particles as 5L/min,
TiC powder particles enter the feed rate of plasma for 5kg/h, and the TiC drops of melting are made；
5) the TiC drops of melting cool and solidify in 60 DEG C of cooling storehouse, that is, spherical shape TiC powder is made.
A kind of spherical shape TiC powder, spherical shape TiC powder are prepared by the plasma preparation method of spherical TiC powder described above
It forms.
Embodiment 6
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 150um to 160um are chosen；
2) plasma ignition is carried out；The operating parameter of plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon gas
Flow is 32L/min；Side gas argon flow amount is 65L/min；
3) after lighting a fire successfully, air pressure and gas flow specifically include in adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 16psia, and middle gas argon flow amount is adjusted to 16L/min, and side gas argon flow amount is adjusted to 33L/min, and side gas hydrogen flowing quantity is
8L/min；Establish stable argon gas-hydrogen gas plasma, radio-frequency power 33KW so that be not in during the melting of TiC powder particles
It vaporizes and is not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, carry the flow of argon gas used in TiC powder particles as 8L/min,
TiC powder particles enter the feed rate of plasma for 7kg/h, and the TiC drops of melting are made；
5) the TiC drops of melting cool and solidify in 50 DEG C of cooling storehouse, that is, spherical shape TiC powder is made.
A kind of spherical shape TiC powder, spherical shape TiC powder are prepared by the plasma preparation method of spherical TiC powder described above
It forms.
Embodiment 7
A kind of plasma preparation method of spherical shape TiC powder, comprises the following steps：
1) the TiC powder particles that grain size is 190um to 200um are chosen；
2) plasma ignition is carried out；The operating parameter of plasma ignition is：Grid current is controlled in 0.2A to 0.3A；Middle gas argon gas
Flow is 40L/min；Side gas argon flow amount is 80L/min；
3) after lighting a fire successfully, air pressure and gas flow specifically include in adjustment control reaction vessel：By gas in reaction vessel
Pressure is adjusted to 20psia, and middle gas argon flow amount is adjusted to 20L/min, and side gas argon flow amount is adjusted to 40L/min, and side gas hydrogen flowing quantity is
0L/min；Establish stable argon gas-hydrogen gas plasma, radio-frequency power 40KW so that be not in during the melting of TiC powder particles
It vaporizes and is not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, carry the flow of argon gas used in TiC powder particles as 11L/min,
TiC powder particles enter the feed rate of plasma for 10kg/h, and the TiC drops of melting are made；
5) the TiC drops of melting cool and solidify in 65 DEG C of cooling storehouse, that is, spherical shape TiC powder is made.
A kind of spherical shape TiC powder, spherical shape TiC powder are prepared by the plasma preparation method of spherical TiC powder described above
It forms.
The foregoing is merely the embodiment of the present invention, not thereby limit scope of patent protection of the invention, every utilization
It is related to be directly or indirectly used in other for the equivalent structure or equivalent flow shift that description of the invention and accompanying drawing content are made
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of plasma preparation method of spherical shape TiC powder, which is characterized in that comprise the following steps：
1) the TiC powder particles that grain size is 40um to 200um are chosen；
2) plasma ignition is carried out；
3) after lighting a fire successfully, air pressure and gas flow in adjustment control reaction vessel establish stable argon gas-hydrogen plasma
Body so that TiC powder particles are not in vaporization when melting and are not dispelled onto equipment inner wall；
4) argon gas carrying TiC powder particles enter plasma, and the TiC drops of melting are made；
5) the TiC drops cooling and solidifying of melting, that is, be made spherical shape TiC powder.
2. the plasma preparation method of spherical shape TiC powder as described in claim 1, which is characterized in that step 2) plasma point
Fire operating parameter be：Grid current is controlled in 0.2A to 0.3A；Middle gas argon flow amount is 5L/min to 40L/min；Side gas argon gas stream
It measures as 20L/min to 80L/min.
3. the plasma preparation method of spherical shape TiC powder as claimed in claim 2, which is characterized in that the use described in step 3)
In molten Ti C powder particles plasma rf power be 5KW to 40KW.
4. the plasma preparation method of spherical shape TiC powder as claimed in claim 3, which is characterized in that step 3) adjustment control
Air pressure and gas flow specifically include in reaction vessel：Air pressure in reaction vessel is adjusted to 5psia to 20psia, middle gas argon gas stream
Amount is adjusted to 5L/min to 20L/min, and side gas argon flow amount is adjusted to 20L/min to 40L/min, side gas hydrogen flowing quantity for 0L/min extremely
30L/min。
5. the plasma preparation method of spherical shape TiC powder as claimed in claim 4, which is characterized in that step 4) carries TiC powder
The flow of argon gas used in particle is 1L/min to 11L/min.
6. the plasma preparation method of spherical shape TiC powder as claimed in claim 5, which is characterized in that step 4) TiC powder particles
Feed rate into plasma is 1kg/h to 10kg/h.
7. the plasma preparation method of spherical shape TiC powder as claimed in claim 6, which is characterized in that the TiC of step 5) melting
Drop cools and solidifies in cooling storehouse, and cooling storehouse is the equipment or device that logical recirculated water is cooled down.
8. the plasma preparation method of spherical shape TiC powder as claimed in claim 7, which is characterized in that the cooling storehouse is
The TiC drops of melting provide 50 DEG C to 80 DEG C of temperature environment.
9. a kind of spherical shape TiC powder, which is characterized in that spherical shape TiC powder is by any spherical TiC powder of claim 1 to 8
Plasma preparation method is prepared.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610977793.1A CN108059164A (en) | 2016-11-08 | 2016-11-08 | Spherical TiC powder prepared by the plasma preparation method and this method of a kind of spherical shape TiC powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610977793.1A CN108059164A (en) | 2016-11-08 | 2016-11-08 | Spherical TiC powder prepared by the plasma preparation method and this method of a kind of spherical shape TiC powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910885A (en) * | 2018-07-27 | 2018-11-30 | 广东正德材料表面科技有限公司 | A kind of spherical shape TiC powder and preparation method thereof |
| CN111792849A (en) * | 2019-04-09 | 2020-10-20 | 武汉理工大学 | Method for preparing quartz glass microspheres by radio frequency plasma |
| CN116063101A (en) * | 2021-11-01 | 2023-05-05 | Ｋｏｍｉｃｏ有限公司 | High density YF by HVOF 3 Method for producing coating and high-density YF 3 Coating layer |
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| CN102674353A (en) * | 2012-05-17 | 2012-09-19 | 赣州海盛钨钼集团有限公司 | Method for preparing spherical wolfram carbide powder |
| KR20150061455A (en) * | 2013-11-27 | 2015-06-04 | 한국생산기술연구원 | Method of spherodizing of boron carbide using plasma spraying treatment |
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| GB1031215A (en) * | 1962-04-03 | 1966-06-02 | Jersey Prod Res Co | Composite material |
| CN102674353A (en) * | 2012-05-17 | 2012-09-19 | 赣州海盛钨钼集团有限公司 | Method for preparing spherical wolfram carbide powder |
| US9079778B2 (en) * | 2013-03-15 | 2015-07-14 | Kennametal Inc. | Production of near-stoichiometric spherical tungsten carbide particles |
| KR20150061455A (en) * | 2013-11-27 | 2015-06-04 | 한국생산기술연구원 | Method of spherodizing of boron carbide using plasma spraying treatment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910885A (en) * | 2018-07-27 | 2018-11-30 | 广东正德材料表面科技有限公司 | A kind of spherical shape TiC powder and preparation method thereof |
| CN111792849A (en) * | 2019-04-09 | 2020-10-20 | 武汉理工大学 | Method for preparing quartz glass microspheres by radio frequency plasma |
| CN116063101A (en) * | 2021-11-01 | 2023-05-05 | Ｋｏｍｉｃｏ有限公司 | High density YF by HVOF 3 Method for producing coating and high-density YF 3 Coating layer |
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