CN104550991A - Preparation method for titanium-aluminum alloy superfine powder - Google Patents
Preparation method for titanium-aluminum alloy superfine powder Download PDFInfo
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- CN104550991A CN104550991A CN201510014092.3A CN201510014092A CN104550991A CN 104550991 A CN104550991 A CN 104550991A CN 201510014092 A CN201510014092 A CN 201510014092A CN 104550991 A CN104550991 A CN 104550991A
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Abstract
The invention discloses a preparation method for titanium-aluminum alloy superfine powder. According to the technical scheme adopted by the invention, the preparation method comprises the following steps: selecting a titanium-aluminum alloy rod which is up-to-standard in component and 3mm and 6mm in diameter as a raw material, adopting a pulse electric spark processor to perform once processing on the titanium-aluminum alloy rod in liquid argon under proper pulse width and pulse interval parameter to obtain titanium-aluminum alloy superfine powder; and then, adopting vacuum low-temperature drying to obtain pure titanium-aluminum alloy superfine powder. The titanium-aluminum alloy superfine powder is widely applied to the titanium-aluminum alloy powder metallurgical preparation industry; the titanium-aluminum alloy material is widely applied to aviation, spaceflight, cars, metallurgy and the like.
Description
Technical field
The present invention relates to a kind of preparation method of titanium-aluminium alloy superfines, particularly adopt in liquid argon, utilize spark erosion technique to prepare the method for titanium-aluminium alloy superfine powder.
Background technology
Titanium-aluminium alloy at high temperature has excellent comprehensive mechanical property and oxidation resistance, makes it in high-temperature applications as Aero-Space engine etc. has great development potentiality.
The method of present Titanium Al alloy powder has the methods such as aerosolization method, water atomization, centrifugal atomizing.The titanium-aluminium alloy powder purity adopting aerosolization method and water atomization to prepare is wayward, is difficult to prepare purity high, the superfines that diameter is little.Adopt centrifugal atomizing can prepare the higher titanium-aluminium alloy powder of purity, but complex process and cost is high.
Summary of the invention
In view of the above deficiency of prior art, the invention provides a kind of preparation method of titanium-aluminium alloy superfines, and make it have the advantages such as titanium-aluminium alloy superfines has regular spherical shape, epigranular, and technique is simple.
The present invention solves its technical problem, and the technical scheme adopted is:
A preparation method for titanium-aluminium alloy superfines, adopts titanium-aluminium alloy bar to be anode electrode and cathode electrode, obtains the superfines of high-purity minor diameter, comprise following key step through electric spark pulse:
1) titanium-aluminium alloy bar removes through surface and to be clamped in respectively after oxide-film process on anode electrode and cathode electrode and anode electrode and cathode electrode are aligned, 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 flood anode electrode and cathode electrode bar;
3) open the pulse power, adjusting pulsewidth is to 200us, and regulate to 100us between arteries and veins, between stabilized electrodes, operating current is at 25A, and operating voltage controls at 50-70v, and the position that supplementary liquid argon makes bar produce electric spark remains on and is in below liquid argon liquid level; Anode electrode and cathodic electricity interpolar discharge produce, fusing, gasification, and after cooling rapidly in liquid argon, quenching, are deposited in bottom heat-preserving container;
4) 3 are taken out) gained sediment puts in vacuum freeze drier, and drying obtains pure titanium-aluminium alloy superfines object.
Compared with prior art, advantage 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 implements Pulse Electric spark machine tool equipment schematic diagram of 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.
The identification of object that above-mentioned each attached picture in picture knows label is: 1 servo feed system; 2 top electrode clamping tools; 3 top electrodes; 4 dielectrics; 5 bottom electrodes; 6 bottom electrode clamping tools; 7 pulse powers; 8 stainless 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) to get length be 175mm diameter is two titanium-aluminium alloy bars of 3mm, and this titanium-aluminium alloy bar composition provides by atomic ratio, is titanium 45.8%, aluminium: 46.2%, tantalum: 8%.Then oxide skin is removed with sand papering, on the upper pole electrode 2 being clamped to electric spark pulse machining tool respectively and lower pole electrode 6.
(2) electric spark pulse machining tool power supply is opened, be 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 the distance adjusting the two poles of the earth electrode is to suitable distance, adjust the two poles of the earth electrode here at a distance of 5mm.
(3) regulate the pulsewidth of electric spark pulse machining tool to 200us, regulate between the arteries and veins of electric spark pulse machining tool and arrive 100us, between stabilized electrodes, operating current is at 25A, and operating voltage controls at 50-70V.
(4) in heat-preserving container, liquid argon 4 is added, until the liquid level of liquid argon 4 floods on the position that lower pole electrode and upper pole electrode will discharge.
(5) open electric spark pulse switch, start powder process.
(6) in pulverizing process along with the volatilization consumption of liquid argon 4, 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 putting a little, when waiting for that in heat-preserving container 8, liquid argon 4 evaporate into enough few, residue liquid argon 4 is poured in a clean container together with powder, is put in vacuum freeze drier dry.
(8) obtained titanium-aluminium alloy superfine powder after drying, powder average diameter 25um, shape is even and spherical in shape.As shown in Figure 2.
Embodiment 2
Preparation method is as follows,
(1) to get length be 175mm diameter is two titanium-aluminium alloy bars of 6mm, and this titanium-aluminium alloy bar composition provides by atomic ratio, is titanium 45.8%, aluminium: 46.2%, tantalum: 8%.Then oxide skin is removed with sand papering, on the upper pole electrode 2 being clamped to electric spark pulse machining tool respectively and lower pole electrode 6.
(2) electric spark pulse machining tool power supply is opened, be 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 the distance adjusting the two poles of the earth electrode is to suitable distance, adjust the two poles of the earth electrode here at a distance of 5mm.
(3) regulate the pulsewidth of electric spark pulse machining tool to 200us, regulate between the arteries and veins of electric spark pulse machining tool and arrive 100us, between stabilized electrodes, operating current is at 25A, and operating voltage controls at 50-70V.
(4) in heat-preserving container, liquid argon 4 is added, until the liquid level of liquid argon 4 floods on the position that pole electrode and lower pole electrode will discharge.
(5) open electric spark pulse switch, start powder process.
(6) in pulverizing process along with the volatilization consumption of liquid argon 4, 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 putting a little, when waiting for that in heat-preserving container 8, liquid argon 4 evaporate into enough few, residue liquid argon 4 is poured in a clean container together with powder, is put in vacuum freeze drier dry.
(8) obtained titanium-aluminium alloy superfine powder after drying, evenly and globulate, diameter is greater than 50um to powder shape, as shown in Figure 3.
Claims (3)
1. a preparation method for titanium-aluminium alloy superfines, is characterized in that, adopts titanium-aluminium alloy bar to be anode electrode and cathode electrode, obtains the superfines of high-purity minor diameter, comprise following key step through electric spark pulse:
1) titanium-aluminium alloy bar removes through surface and to be clamped in respectively after oxide-film process on anode electrode and cathode electrode and anode electrode and cathode electrode are aligned, 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 flood anode electrode and cathode electrode bar;
3) open the pulse power, adjusting pulsewidth is to 200us, and regulate to 100us between arteries and veins, between stabilized electrodes, operating current is at 25A, and operating voltage controls at 50-70V, and the position that supplementary liquid argon makes bar produce electric spark remains on and is in below liquid argon liquid level; Anode electrode and cathodic electricity interpolar discharge produce, fusing, gasification, and after cooling rapidly in liquid argon, quenching, are deposited in bottom heat-preserving container;
4) 3 are taken out) gained sediment puts in vacuum freeze drier, and drying obtains pure titanium-aluminium alloy superfines object.
2. the preparation method of titanium-aluminium alloy superfines according to claim 1, it is characterized in that, the atomic percent of described titanium-aluminium alloy powder bar is, titanium 45.8%, aluminium: 46.2%, tantalum: 8%.
3. Parameter adjustable intelligence high-performance enginer main truss according to claim 1, it is characterized in that, described liquid argon purity is not less than 99.9%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110961644A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Novel spherical powder and method for producing same |
| CN113492213A (en) * | 2021-09-07 | 2021-10-12 | 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 |
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| 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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2015
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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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110961644A (en) * | 2019-11-07 | 2020-04-07 | 深圳航科新材料有限公司 | Novel spherical powder and method for producing same |
| 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 |
| CN113492213A (en) * | 2021-09-07 | 2021-10-12 | 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 |
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