CN104550991B - A kind of preparation method of titanium-aluminium alloy superfines - Google Patents
A kind of preparation method of titanium-aluminium alloy superfines Download PDFInfo
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- CN104550991B CN104550991B CN201510014092.3A CN201510014092A CN104550991B CN 104550991 B CN104550991 B CN 104550991B CN 201510014092 A CN201510014092 A CN 201510014092A CN 104550991 B CN104550991 B CN 104550991B
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Abstract
The preparation method that the invention discloses a kind of titanium-aluminium alloy superfines, its technical scheme is that selection component is up to standard, the titanium-aluminium alloy bar of diameter 3mm and 6mm is as raw material, adopt pulse electric discharge machining apparatus, under suitable pulse width and pulse spacing parameter, in liquid argon, titanium-aluminium alloy bar is carried out time processing and obtain titanium-aluminium alloy superfines, then adopt vacuum dehydrating at lower temperature to obtain pure titanium-aluminium alloy superfines.Titanium-aluminium alloy superfines is widely used in titanium-aluminium alloy powder metallurgy and prepares industry, and Ti-Al alloy material is widely used in Aeronautics and Astronautics, automobile, metallurgy etc..
Description
Technical field
The preparation method that the present invention relates to a kind of titanium-aluminium alloy superfines, especially with, in liquid argon, utilizing the method that spark erosion technique prepares titanium-aluminium alloy micropowder.
Background technology
Titanium-aluminium alloy at high temperature has comprehensive mechanical property and the oxidation resistance of excellence so that it is have great development potentiality at high-temperature applications such as Aero-Space electromotor etc..
The method of present Titanium Al alloy powder has the methods such as aerosolization method, water atomization, centrifugal atomizing.Adopt titanium-aluminium alloy powder purity prepared by aerosolization method and water atomization wayward, be difficult to prepare purity height, the superfines that diameter is little.Adopt centrifugal atomizing can prepare the titanium-aluminium alloy powder that purity is higher, but complex process and cost are high.
Summary of the invention
In view of the above deficiency of prior art, the preparation method that the present invention provides a kind of titanium-aluminium alloy superfines, and make it have titanium-aluminium alloy superfines there is regular spherical shape, epigranular, the advantages such as technique is simple.
This invention address that its technical problem, be the technical scheme is that
A kind of preparation method of titanium-aluminium alloy superfines, adopting titanium-aluminium alloy bar is anode electrode and cathode electrode, obtains the superfines of high-purity minor diameter through electric spark pulse, comprises following key step:
1) titanium-aluminium alloy bar removes through surface and is clamped in respectively on anode electrode and cathode electrode after oxide-film processes and makes anode electrode and cathode electrode align, and regulates anode electrode and the titanium-aluminium alloy bar clamped by cathode electrode to suitable distance；
2) in heat-preserving container, liquid argon is added until flooding anode electrode and cathode electrode bar；
3) opening the pulse power, adjusting pulsewidth, to 200us, regulates to 100us between arteries and veins, and between stabilized electrodes, operating current is at 25A, and running voltage controls at 50-70v, and supplementary liquid argon makes the position that bar produces electric spark be maintained at below liquid argon liquid level；Anode electrode and cathodic electricity interpolar discharge produce, fusing, gasification, and in liquid argon after cooling rapidly, quenching, are deposited in bottom heat-preserving container；
4) 3 are taken out) gained precipitate puts in vacuum freeze drier, dry obtains pure titanium-aluminium alloy superfines object.
Compared with prior art, advantages of the present invention also has technique simply, and titanium-aluminium alloy superfines product has regular spherical shape, epigranular advantage.
Accompanying drawing explanation
Fig. 1 is the Pulse Electric spark machine tool equipment schematic diagram implementing the present invention.
Fig. 2 is the scanning electron microscope (SEM) photograph of the titanium-aluminium alloy superfines obtained by embodiment 1.
Fig. 3 is the scanning electron microscope (SEM) photograph of the titanium-aluminium alloy superfines obtained by embodiment 2.
In above-mentioned each accompanying drawing, figure knows the mark of label to liking: 1 servo feed system；Electrode clamping tool on 2；Electrode on 3；4 electrolytes；5 bottom electrodes；6 bottom electrode clamping tools；7 pulse powers；8 rustless steel heat-preserving containers.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described:
Embodiment 1
Preparation method is as follows,
(1) taking length to be 175mm diameter be two titanium-aluminium alloy bars of 3mm, this titanium-aluminium alloy bar composition provides by atomic ratio, for titanium 45.8%, aluminum: 46.2%, tantalum: 8%.Then remove oxide skin with sand papering, be clamped to respectively on upper pole electrode 2 and the lower pole electrode 6 of electric spark pulse machining tool.
(2) electric spark pulse machining tool power supply is opened, being fixed on bottom heat-preserving container 8 by lower pole electrode 6, in adjustment, pole electrode 3 and the position of lower pole electrode 5, make their one end align, and adjust the distance of the two poles of the earth electrode to suitable distance, adjust the two poles of the earth electrode here at a distance of 5mm.
(3) regulating the pulsewidth of electric spark pulse machining tool to 200us, regulate to 100us between the arteries and veins of electric spark pulse machining tool, between stabilized electrodes, operating current is at 25A, and running voltage controls at 50-70V.
(4) in heat-preserving container, liquid argon 4 is added, until on the position that the liquid level of liquid argon 4 floods lower pole electrode and upper pole electrode to discharge.
(5) open electric spark pulse switch, start powder process.
(6) along with the volatilization consumption of liquid argon 4 in pulverizing process, in heat-preserving container, add liquid argon 4, to ensure that liquid argon 4 liquid level floods electrode discharge position, the two poles of the earth always in good time.
(7) after producing enough powder, turn off electric spark pulse machining tool switch, stop electric spark and put a little, wait time liquid argon 4 evaporate into enough few in heat-preserving container 8, residue liquid argon 4 is poured in a clean container together with powder, is put in vacuum freeze drier dry.
(8) preparing titanium-aluminium alloy micropowder after drying, powder average diameter 25um, shape is uniform and spherical in shape.As shown in Figure 2.
Embodiment 2
Preparation method is as follows,
(1) taking length to be 175mm diameter be two titanium-aluminium alloy bars of 6mm, this titanium-aluminium alloy bar composition provides by atomic ratio, for titanium 45.8%, aluminum: 46.2%, tantalum: 8%.Then remove oxide skin with sand papering, be clamped to respectively on upper pole electrode 2 and the lower pole electrode 6 of electric spark pulse machining tool.
(2) electric spark pulse machining tool power supply is opened, being fixed on bottom heat-preserving container 8 by lower pole electrode 6, in adjustment, pole electrode 3 and the position of lower pole electrode 5, make their one end align, and adjust the distance of the two poles of the earth electrode to suitable distance, adjust the two poles of the earth electrode here at a distance of 5mm.
(3) regulating the pulsewidth of electric spark pulse machining tool to 200us, regulate to 100us between the arteries and veins of electric spark pulse machining tool, between stabilized electrodes, operating current is at 25A, and running voltage controls at 50-70V.
(4) in heat-preserving container, liquid argon 4 is added, until on the position that the liquid level of liquid argon 4 floods pole electrode and lower pole electrode to discharge.
(5) open electric spark pulse switch, start powder process.
(6) along with the volatilization consumption of liquid argon 4 in pulverizing process, in heat-preserving container, add liquid argon 4, to ensure that liquid argon 4 liquid level floods electrode discharge position, the two poles of the earth always in good time.
(7) after producing enough powder, turn off electric spark pulse machining tool switch, stop electric spark and put a little, wait time liquid argon 4 evaporate into enough few in heat-preserving container 8, residue liquid argon 4 is poured in a clean container together with powder, is put in vacuum freeze drier dry.
(8) preparing titanium-aluminium alloy micropowder after dry, uniformly and globulate, diameter is more than 50um, as shown in Figure 3 for powder shape.
Claims (3)
1. the preparation method of a titanium-aluminium alloy superfines, it is characterised in that adopting titanium-aluminium alloy bar is anode electrode and cathode electrode, obtains the superfines of high-purity minor diameter through electric spark pulse, comprises following key step:
1) titanium-aluminium alloy bar removes through surface and is clamped in respectively on anode electrode and cathode electrode after oxide-film processes and makes anode electrode and cathode electrode align, and regulates anode electrode and the titanium-aluminium alloy bar clamped by cathode electrode to suitable distance；
2) in heat-preserving container, liquid argon is added until flooding anode electrode and cathode electrode bar；
3) opening the pulse power, adjusting pulsewidth, to 200us, regulates to 100us between arteries and veins, and between stabilized electrodes, operating current is at 25A, and running voltage controls at 50-70V, and supplementary liquid argon makes the position that bar produces electric spark be maintained at below liquid argon liquid level；Anode electrode and cathodic electricity interpolar discharge produce, fusing, gasification, and in liquid argon after cooling rapidly, quenching, are deposited in bottom heat-preserving container；
4) 3 are taken out) gained precipitate puts in vacuum freeze drier, dry obtains pure titanium-aluminium alloy superfines object.
2. the preparation method of titanium-aluminium alloy superfines according to claim 1, it is characterised in that the atomic percent of described titanium-aluminium alloy powder bar is, titanium 45.8%, aluminum: 46.2%, tantalum: 8%.
3. the preparation method of titanium-aluminium alloy superfines according to claim 1, it is characterised in that described liquid argon purity is not less than 99.9%.
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| CN110862072A (en) * | 2019-11-07 | 2020-03-06 | 深圳第三代半导体研究院 | Preparation method of nano metal oxide material |
| CN110961644B (en) * | 2019-11-07 | 2023-09-01 | 深圳航科新材料有限公司 | Spherical powder and method for producing the same |
| CN113492213B (en) * | 2021-09-07 | 2021-12-07 | 西安欧中材料科技有限公司 | Preparation method and equipment of high-sphericity low-oxygen-content TiAl alloy powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158121A (en) * | 1992-11-27 | 1994-06-07 | Mitsubishi Electric Corp | Magnetic material formed with electric discharge-machined powder |
| CN1105305A (en) * | 1994-01-30 | 1995-07-19 | 吉林大学 | Technique for producing ultramicro Ni (or Fe) powder by DC arc plasma method |
| CN1868638A (en) * | 2006-04-28 | 2006-11-29 | 上海大学 | Method of preparing conductive metal nanometer powder by consumbale-cathode DC electric arc method |
| CN101797687A (en) * | 2010-01-19 | 2010-08-11 | 哈尔滨工业大学 | Preparation method of TiAl alloy with fine grain full synusia tissue |
| CN101817143A (en) * | 2010-01-19 | 2010-09-01 | 哈尔滨工业大学 | Method for improving hot processing performance of TiAl alloy |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158121A (en) * | 1992-11-27 | 1994-06-07 | Mitsubishi Electric Corp | Magnetic material formed with electric discharge-machined powder |
| CN1105305A (en) * | 1994-01-30 | 1995-07-19 | 吉林大学 | Technique for producing ultramicro Ni (or Fe) powder by DC arc plasma method |
| CN1868638A (en) * | 2006-04-28 | 2006-11-29 | 上海大学 | Method of preparing conductive metal nanometer powder by consumbale-cathode DC electric arc method |
| CN101797687A (en) * | 2010-01-19 | 2010-08-11 | 哈尔滨工业大学 | Preparation method of TiAl alloy with fine grain full synusia tissue |
| CN101817143A (en) * | 2010-01-19 | 2010-09-01 | 哈尔滨工业大学 | Method for improving hot processing performance of TiAl alloy |
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