CN108950282B - A kind of preparation method of the aluminium alloy containing micropore - Google Patents
A kind of preparation method of the aluminium alloy containing micropore Download PDFInfo
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- CN108950282B CN108950282B CN201810942649.3A CN201810942649A CN108950282B CN 108950282 B CN108950282 B CN 108950282B CN 201810942649 A CN201810942649 A CN 201810942649A CN 108950282 B CN108950282 B CN 108950282B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Organic Chemistry (AREA)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a kind of preparation methods of aluminium alloy containing micropore, belong to aluminium alloy manufacture field.The preparation method includes: after aluminium is heated and melted, to obtain liquid aluminium；Under conditions of relative air humidity is 80~100%, liquid aluminium is oxidized to alumina fragments；Alumina fragments are crushed and collection cut size is 10 μm of powder below, obtain alumina powder；Hydrogen and inert gas are mixed, mixed gas is obtained；It after alumina powder is mixed with mixed gas, is passed through in the liquid aluminum feedstock of fusing, and be stirred, is evenly distributed on alumina powder in liquid aluminum feedstock, after cooling, obtain the aluminium alloy containing micropore.The micropore of the equally distributed and spherical hole with smooth inner wall of many of the aluminium alloy of this method preparation or approximate ball, these micropores enable the aluminium alloy containing micropore to have the function of ventilative, saturating oil or permeable, and there are no pollution to the environment in the preparation process, can be mass produced.
Description
Technical field
The present invention relates to aluminium alloy manufacture field, in particular to the preparation method of a kind of aluminium alloy containing micropore.
Background technique
Aluminium alloy containing micropore is a direction of Al-alloy material research.It needs to use in certain fields and contain
The aluminium alloy of micropore can realize ventilative, saturating oil or permeable purpose using the micropore on the aluminium alloy containing micropore, at present for
It is to corrode aluminium alloy by chemical reagent that such, which has the processing method of the aluminium alloy of micropore, enables aluminum alloy to generation micropore, the party
Method has pollution to environment, is unfavorable for the large-scale production of the aluminium alloy containing micropore.
Summary of the invention
In order to solve problems in the prior art, the embodiment of the invention provides a kind of preparation sides of aluminium alloy containing micropore
Method.The technical solution is as follows:
The present invention provides a kind of preparation method of aluminium alloy containing micropore, the preparation method includes:
After aluminium is heated and melted, liquid aluminium is obtained；
Under conditions of relative air humidity is 80~100%, the liquid aluminium is oxidized to alumina fragments；
The alumina fragments are crushed and collection cut size is 10 μm of powder below, obtain alumina powder；
Hydrogen and inert gas are mixed, mixed gas is obtained；
After the alumina powder is mixed with the mixed gas, it is passed through in the liquid aluminum feedstock of fusing, and stirred
It mixes, is evenly distributed on the alumina powder in the liquid aluminum feedstock, after cooling, obtain the aluminium containing micropore and close
Gold.
Specifically, the weight percent of the alumina powder and the liquid aluminum feedstock is 0.01~0.1%.
Specifically, the inert gas is helium or argon gas.
Specifically, after the alumina powder being mixed with the mixed gas, it is passed through the melting equipped with liquid aluminum feedstock
In furnace, when stirring, the pressure in the smelting furnace is 0.15~0.4MPa.
Further, the preparation method further include: be passed through inert gas in Xiang Suoshu smelting furnace, make in the smelting furnace
Air discharge after, then the alumina powder and the mixed gas be passed through in the smelting furnace.
Further, the concentration of the hydrogen in the smelting furnace is 1%.
Specifically, after stirring, the pressure in pressure to the smelting furnace in smelting furnace described in slow release is normal
Pressure.
Specifically, the time of the stirring is 8~12min.
Specifically, it includes: to blow powder by air blower or cyclone cluster that the collection cut size, which is the method for 10 μm of powder below,
The alumina fragments after broken, collect the powder blown afloat, obtain the alumina powder.
Technical solution provided in an embodiment of the present invention has the benefit that the embodiment of the invention provides one kind to contain
The preparation method of the aluminium alloy of micropore, the condition that alumina powder prepared by the present invention is 80~100% in relative air humidity
Lower preparation enables to the surface of alumina powder loose porous under this condition, and the alumina powder is made to have good absorption
Activity mixes alumina powder with hydrogen, enables alumina powder as hydrogen carrier and adsorbs hydrogen ion, it can be achieved that delivery hydrogen
The effect of ion can will be loaded with hydrionic alumina powder and be evenly distributed in liquid aluminum feedstock, to liquid in whipping process
Solid aluminium alloy is formed after state aluminum feedstock is cooling, solubility of the hydrogen ion in solid aluminium alloy sharply declines, so that hydrogen
Ion releasing forms hydrogen gas bubbles, but liquid aluminium has formed solid aluminium alloy at this time, and bubble is fixed without suddenly escaping
In aluminium alloy, and the micro- of spherical hole or approximate ball many equally distributed and with smooth inner wall is formed in the aluminium alloy
Hole, these micropores enable aluminium alloy finished product to have the function of ventilative, saturating oil or permeable, and do not have in the preparation process to environment
There is pollution, can be mass produced.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart of the preparation method of the aluminium alloy provided in an embodiment of the present invention containing micropore.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of preparation methods of aluminium alloy containing micropore, as shown in Figure 1, the preparation method
Include:
Step 1: after aluminium is heated and melted, obtaining liquid aluminium；
Step 2: under conditions of relative air humidity is 80~100%, liquid aluminium being oxidized to alumina fragments；
Step 3: alumina fragments being crushed and collection cut size is 10 μm of powder below, obtain alumina powder；
Step 4: hydrogen and inert gas being mixed, mixed gas is obtained；
Step 5: after alumina powder is mixed with mixed gas, it is passed through in the liquid aluminum feedstock of fusing, and be stirred,
It is evenly distributed on alumina powder in liquid aluminum feedstock, after cooling, obtains the aluminium alloy containing micropore.This contains the aluminium of micropore
The aperture of micropore in alloy is in 0.1mm or less.Wherein, gained after liquid aluminum feedstock can be heated and be melted using aluminium, can also
To melt some aluminium in step 1, then a part is used to prepare alumina powder more, and a part is used as liquid aluminum feedstock.
Specifically, the weight percent of alumina powder and liquid aluminum feedstock can be 0.01~0.1%.Work as alumina powder
When end and the weight percent of liquid aluminum feedstock are 0.01%, the porosity of the aluminium alloy containing micropore is 1%, works as alumina powder
When end and the weight percent of liquid aluminum feedstock are 0.1%, the porosity of the aluminium alloy containing micropore is 15%.When realizing,
The weight percent of alumina powder and liquid aluminum feedstock can be adjusted according to the demand of the porosity of the aluminium alloy containing micropore
It is whole.
Further, the concentration of the hydrogen in smelting furnace can be 1%.The concentration of hydrogen is 1% (safety standard value) energy
Enough guarantee that the preparation method carries out under the environment of safety.
Specifically, inert gas can be helium or argon gas.Intake by changing inert gas can guarantee constantly
The concentration of hydrogen is 1% always, and the concentration that can be avoided hydrogen in this way is excessive, to prevent from exploding.
Specifically, it after alumina powder being mixed with mixed gas, is passed through in the smelting furnace equipped with liquid aluminum feedstock, stirs
When, the pressure in smelting furnace can be 0.15~0.4MPa.By the pressure in increase smelting furnace, mixing time can be shortened,
Improve preparation efficiency.
Further, which can also include: that inert gas is passed through into smelting furnace, make the air in smelting furnace
After discharge, then alumina powder and mixed gas be passed through in smelting furnace.It is can be avoided in smelting furnace in this way due to there are oxygen
There is the danger of explosion, to improve the safety of smelting furnace.Wherein, inert gas can be helium or argon gas.
Specifically, after stirring, the pressure in pressure to smelting furnace in slow release smelting furnace is normal pressure.Slowly release
Smelting furnace safety with higher can be made by putting the pressure in smelting furnace.Pressure rate of release when realizing, in smelting furnace
It can be 0.4~0.6MPa/h.
Specifically, after stirring, liquid aluminium can be discharged from the discharge outlet of the bottom of smelting furnace and aluminium alloy finished product is made,
As long as keeping liquid aluminium always above the safety for ensuring that smelting furnace at the top of discharge outlet, meltings may not necessarily be thus waited
Pressure in furnace is reduced to normal pressure and discharges liquid aluminium again, to improve production efficiency.
Specifically, the time of stirring can be 8~12min.It can guarantee that alumina powder is evenly distributed in liquid in this way
In state aluminum feedstock.
Specifically, it includes: after blowing crushing by air blower or cyclone cluster that collection cut size, which is the method for 10 μm of powder below,
Alumina fragments, collect the powder blown afloat, obtain alumina powder.
Specifically, alumina fragments can be crushed by pulverizer.
The embodiment of the invention provides a kind of preparation method of aluminium alloy containing micropore, alumina powders prepared by the present invention
End prepares under conditions of relative air humidity is 80~100%, enables to the surface of alumina powder loose under this condition
It is porous, make the alumina powder that there is good adsorption activity, alumina powder is mixed with hydrogen, enables alumina powder
Hydrogen ion is adsorbed, it can be achieved that delivering hydrionic effect as hydrogen carrier, in whipping process, can will be loaded with hydrionic oxidation
Aluminium powder is evenly distributed in liquid aluminum feedstock, forms solid aluminium alloy after liquid aluminum feedstock is cooling, hydrogen ion is in solid-state
Aluminium alloy in solubility sharply decline so that hydrogen ion is precipitated to form hydrogen gas bubbles, but at this time liquid aluminium formed it is solid
The aluminium alloy of state, bubble are fixed in aluminium alloy without suddenly escaping, and are formed in the aluminium alloy many equally distributed
And the micropore in the spherical hole or approximate ball with smooth inner wall, these micropores enable aluminium alloy finished product to have ventilative, saturating oil
Or permeable function, and there are no pollution to the environment in the preparation process, can be mass produced.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of preparation method of the aluminium alloy containing micropore, which is characterized in that the preparation method includes:
After aluminium is heated and melted, liquid aluminium is obtained；
Under conditions of relative air humidity is 80~100%, the liquid aluminium is oxidized to alumina fragments；
The alumina fragments are crushed and collection cut size is 10 μm of powder below, obtain alumina powder；
Hydrogen and inert gas are mixed, mixed gas is obtained；
After the alumina powder is mixed with the mixed gas, it is passed through in the liquid aluminum feedstock of fusing, and be stirred, makes
The alumina powder is evenly distributed in the liquid aluminum feedstock, the weight of the alumina powder and the liquid aluminum feedstock
Percentage is 0.01~0.1%, after cooling, obtains the aluminium alloy containing micropore.
2. preparation method according to claim 1, which is characterized in that the inert gas is helium or argon gas.
3. preparation method according to claim 1, which is characterized in that mix the alumina powder and the mixed gas
It after conjunction, is passed through in the smelting furnace equipped with liquid aluminum feedstock, when stirring, the pressure in the smelting furnace is 0.15~0.4MPa.
4. preparation method according to claim 3, which is characterized in that the preparation method further include: Xiang Suoshu smelting furnace
In be passed through inert gas, after air in the smelting furnace is discharged, then the alumina powder and the mixed gas led to
Enter in the smelting furnace.
5. preparation method according to claim 3, which is characterized in that the concentration of the hydrogen in the smelting furnace is 1%.
6. preparation method according to claim 1, which is characterized in that after stirring, in smelting furnace described in slow release
Pressure to the smelting furnace in pressure be normal pressure.
7. preparation method according to claim 1, which is characterized in that the time of the stirring is 8~12min.
8. preparation method according to claim 1, which is characterized in that the collection cut size is the side of 10 μm of powder below
Method includes: to blow the smashed alumina fragments by air blower or cyclone cluster, collects the powder blown afloat, obtains the oxidation
Aluminium powder.
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| CN201810942649.3A CN108950282B (en) | 2018-08-17 | 2018-08-17 | A kind of preparation method of the aluminium alloy containing micropore |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108215A (en) * | 1993-11-25 | 1995-09-13 | 住友化学工业株式会社 | Method for producing alpha-alumina powder |
| US6250362B1 (en) * | 1998-03-02 | 2001-06-26 | Alcoa Inc. | Method and apparatus for producing a porous metal via spray casting |
| CN102312117A (en) * | 2011-10-11 | 2012-01-11 | 大连交通大学 | Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming |
| CN103392020A (en) * | 2011-02-18 | 2013-11-13 | 法国肯联铝业 | Semi-finished product made of aluminium alloy having improved microporosity and manufacturing process |
| CN107601537A (en) * | 2017-11-01 | 2018-01-19 | 乌鲁木齐市三锐科技有限公司 | Rafifinal atomization explosion method prepares the method and special purpose device of high-purity alumina powder |
-
2018
- 2018-08-17 CN CN201810942649.3A patent/CN108950282B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108215A (en) * | 1993-11-25 | 1995-09-13 | 住友化学工业株式会社 | Method for producing alpha-alumina powder |
| US6250362B1 (en) * | 1998-03-02 | 2001-06-26 | Alcoa Inc. | Method and apparatus for producing a porous metal via spray casting |
| CN103392020A (en) * | 2011-02-18 | 2013-11-13 | 法国肯联铝业 | Semi-finished product made of aluminium alloy having improved microporosity and manufacturing process |
| CN102312117A (en) * | 2011-10-11 | 2012-01-11 | 大连交通大学 | Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming |
| CN107601537A (en) * | 2017-11-01 | 2018-01-19 | 乌鲁木齐市三锐科技有限公司 | Rafifinal atomization explosion method prepares the method and special purpose device of high-purity alumina powder |
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| CN108950282A (en) | 2018-12-07 |
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