CN104004937B - A kind of preparation method of high porosity through hole aluminum or aluminum alloy foam - Google Patents
A kind of preparation method of high porosity through hole aluminum or aluminum alloy foam Download PDFInfo
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- CN104004937B CN104004937B CN201410181536.8A CN201410181536A CN104004937B CN 104004937 B CN104004937 B CN 104004937B CN 201410181536 A CN201410181536 A CN 201410181536A CN 104004937 B CN104004937 B CN 104004937B
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Abstract
The present invention relates to the preparation method of a kind of high porosity through hole aluminum or aluminum alloy foam, belong to porous metal material field.The method uses the NaCl granule of two kinds of different-grain diameter scopes to be seepage flow presoma, by two kinds of different-grain diameter scope NaCl granules with the use of, obtain the through hole seepage flow aluminum or aluminum alloy foam of porosity 78 95%, have that aluminum or aluminum alloy foam pore structure is controlled, the feature of the simple low cost of preparation technology, industrialized production can be realized.
Description
Technical field
The present invention relates to the preparation method of a kind of high porosity through hole aluminum or aluminum alloy foam, belong to porous metal material neck
Territory.
Background technology
Use the through hole aluminum or aluminum alloy foam prepared of Seepage Foundry method, have low-density, Gao Biqiang, energy absorption,
The features such as sound-absorption vibration-reduction, electromagnetic shielding, low grade fever electrical conductivity, lead at structural material, noise control, building decoration, heat-insulation and heat-preservation etc.
Territory has wide application market.In particular with its sound absorption function, have been realized in highway, city overhead road bridge,
The sound-absorbing application of ferrum etc., defines certain market scale.
But, conventional through hole aluminum or aluminum alloy foam prepared by Seepage Foundry method, the aluminum or aluminum alloy obtained steeps
Foam porosity is relatively low, between 60-75%.Substantial amounts of research and data show, the sound absorption qualities of through hole aluminum or aluminum alloy foam,
Improve with the raising of its porosity.Therefore, how to improve the porosity of seepage flow aluminum or aluminum alloy foam, and then improve its sound-absorbing
Performance, is the problem of aluminum or aluminum alloy foam sound absorption function application needs solution.
The reason that conventional through hole aluminum or aluminum alloy foam porosities prepared by Seepage Foundry method is relatively low, is that it is used
The NaCl granule that seepage flow presoma is single particle size scope.
Summary of the invention
The present invention is directed to the deficiency that aluminum or aluminum alloy foam porosities prepared by current infiltration casting is relatively low, cast at seepage flow
On the basis of making method, it is provided that the preparation method of a kind of high porosity through hole aluminum or aluminum alloy foam, use two kinds of different-grain diameter models
The NaCl granule enclosed is seepage flow presoma, by two kinds of different-grain diameter scope NaCl granules with the use of, it is thus achieved that porosity 78-
The through hole seepage flow aluminum or aluminum alloy foam of 95%, has aluminum or aluminum alloy foam pore structure controlled, the simple low cost of preparation technology
Feature, can realize industrialized production.
The preparation method of high porosity through hole aluminum or aluminum alloy foam of the present invention comprises the steps:
(1) aluminum or aluminum alloy melt is prepared；
(2) the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, and one of which is body particles, particle diameter
Scope is the one in 2～2.36mm, 1.7～2mm or 1.4～1.7mm, and another kind is that porosity regulates and controls granule, particle size range
For, according to volume ratio=1:(ξ/0.7～1 of body particles with porosity regulation and control granule)
Ratio mix, compound mixes 10～60min in blender and i.e. obtains seepage flow presoma；For body particles
The meansigma methods of particle size range, ξ is the porosity (porosity of the final through hole aluminum or aluminum alloy foam prepared) of target material；
(3) seepage flow presoma is placed in seepage flow mould, is preheating to 400～500 DEG C and is incubated 20～40min；
(4) aluminum or aluminum alloy melt is poured in seepage flow mould, by aluminum or aluminum alloy melt under the air pressure of 2～5atm.
In the hole of press-in seepage flow presoma, obtain the mixture of aluminum or aluminum alloy melt and salt particle；
(5) mixture of aluminum or aluminum alloy melt Yu salt particle is cooled to room temperature, with water-soluble except NaCl granule therein,
Obtain the through hole aluminum or aluminum alloy foam of porosity 78-95%.
The preparation of described aluminum and aluminium alloy melt is that aluminum or aluminum alloy is heated to above aluminum or aluminum alloy fusing point 20～40
DEG C temperature melting, and be incubated 20～60min.
The principle of the invention is:
1, porosity regulation and control and seepage flow granule choose principle
NaCl seepage flow granule is subsphaeroidal, and its packing coefficient is 0.68 ~ 0.74, i.e. have 36 ~ 42% hole (this hole is
Aluminum or aluminum alloy after seepage flow is filled), the porosity of aluminum or aluminum alloy foam to be improved, it is necessary for improving the heap of NaCl granule
Long-pending coefficient.
If the volume of aluminum or aluminum alloy foam is；NaCl body particles a diameter of, volume be, take；The particle diameter of porosity regulation and control granule is, volume be；In aluminum or aluminum alloy foam
The volume of aluminum or aluminum alloy be；The porosity of target material is ξ.
Then:(1)
(2)
(3)
According to (1), (2) and (3) formula, the most availableSolve, and can get:
(4)
The volume ratio between NaCl body particles and NaCl porosity regulation and control granule is i.e. can get by (4) formula.
By the stacking geometrical relationship of spheroid, it is known that the gap size of NaCl body particles is (0.155 ~ 0.414), will
This gap size is defined as, take=(0.2 ~ 0.4), in this patent, takeAverage for its particle size range
Value, the size in conjunction with existing screen cloth (willValue of calculation with compared with screen mesh size, choose the most close with screen mesh size
Numerical value isValue range), NaCl body particles and porosity regulation and control grain diameter between mutual relation.
Beneficial effects of the present invention: the aluminum or aluminum alloy foam porosities prepared for current infiltration casting is relatively low not
Foot, on the basis of infiltration casting, the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, by two kinds not
With particle size range NaCl granule with the use of, it is thus achieved that the through hole seepage flow aluminum or aluminum alloy foam of porosity 78-95%, there is aluminum
Or aluminum alloy foam pore structure is controlled, the feature of the simple low cost of preparation technology, can realize industrialized production.
Accompanying drawing explanation
Fig. 1 is the process chart that the present invention prepares high porosity through hole aluminum or aluminum alloy foam.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, the invention will be further described.
Embodiment one: the preparation method of present embodiment high porosity through hole aluminum or aluminum alloy foam is:
(1) commercial-purity aluminium is heated to 700 DEG C melt and be incubated 20min., it is thus achieved that commercial-purity aluminium melt；
(2) the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, and one of which is body particles, additionally
One regulates and controls granule for porosity, and the particle size range of body particles is 1.4 ~ 1.7mm(, 14 mesh and the sorting of 12 mesh sieve), it is put down
All particle diameters are 1.55mm, and the particle size range of porosity regulation and control granule is=0.3 ~ 0.6mm(50 mesh and 30 mesh sieve are divided
Choosing), mix according to the ratio of body particles with the volume ratio=1:0.114 of porosity regulation and control granule, compound is at blender
Middle mixing 10min. obtains seepage flow presoma；
(3) the seepage flow presoma that step (2) obtains is placed in seepage flow mould, is preheating to 500 DEG C and is incubated 40min.；
(4) the commercial-purity aluminium melt that step (1) prepares is poured into seepage flow mould, by commercial-purity aluminium under the air pressure of 2atm.
In the hole of melt press-in seepage flow presoma, obtain the mixture of commercial-purity aluminium melt and salt particle；
(5) mixture that step (4) obtains is cooled to room temperature in atmosphere, with water-soluble except NaCl granule therein,
Through hole commercial-purity aluminium foam to porosity 78%.
Embodiment two: the preparation method of present embodiment high porosity through hole aluminum or aluminum alloy foam is:
(1) Al-Si12 alloy is heated to 600 DEG C melt and be incubated 60min., it is thus achieved that Al-Si12 alloy melt；
(2) the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, and one of which is body particles, additionally
One regulates and controls granule for porosity, and the particle size range of body particles is 2 ~ 2.36mm(, 10 mesh and the sorting of 8 mesh sieve), it is average
Particle diameter is 2.18mm, and the particle size range of porosity regulation and control granule is=0.425 ~ 0.85mm(40 mesh and 20 mesh sieve are divided
Choosing), mix according to the ratio of body particles with the volume ratio=1:0.36 of porosity regulation and control granule, compound is at blender
Middle mixing 60min. obtains seepage flow presoma；
(3) the seepage flow presoma that step (2) obtains is placed in seepage flow mould, is preheating to 400 DEG C and is incubated 20min.；
(4) the Al-Si12 alloy melt that step (1) prepares is poured into seepage flow mould, by Al-under the air pressure of 5atm.
In the hole of Si12 alloy melt press-in seepage flow presoma, obtain the mixture of Al-Si12 alloy melt and salt particle；
(5) mixture that step (4) obtains is cooled to room temperature in atmosphere, with water-soluble except NaCl granule therein,
Through hole Al-Si12 alloy foam to porosity 95%.
Embodiment three: the preparation method of present embodiment high porosity through hole aluminum or aluminum alloy foam is:
(1) ZL201 alloy is heated to 665 DEG C melt and be incubated 40min., it is thus achieved that ZL201 alloy melt；
(2) the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, and one of which is body particles, additionally
One regulates and controls granule for porosity, and the particle size range of body particles is 1.7 ~ 2mm(, 12 mesh and the sorting of 10 mesh sieve), it is average
Particle diameter is 1.85mm, and the particle size range of porosity regulation and control granule is=0.355 ~ 0.74mm(45 mesh and 25 mesh sieve are divided
Choosing), mix according to the ratio of body particles with the volume ratio=1:0.214 of porosity regulation and control granule, compound is at blender
Middle mixing 30min. obtains seepage flow presoma；
(3) the seepage flow presoma that step (2) obtains is placed in seepage flow mould, is preheating to 450 DEG C and is incubated 30min.；
(4) the ZL201 alloy melt that step (1) prepares is poured into seepage flow mould, under the air pressure of 4atm., ZL201 is closed
In the hole of gold melt press-in seepage flow presoma, obtain the mixture of ZL201 alloy melt and salt particle；
(5) mixture that step (4) obtains is cooled to room temperature in atmosphere, with water-soluble except NaCl granule therein,
Through hole ZL201 alloy foam to porosity 85%.
Above in association with accompanying drawing, the detailed description of the invention of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to before without departing from present inventive concept
Put that various changes can be made.
Claims (2)
1. the preparation method of a high porosity through hole aluminum or aluminum alloy foam, it is characterised in that concrete steps include:
(1) aluminum or aluminum alloy melt is prepared；
(2) the NaCl granule using two kinds of different-grain diameter scopes is seepage flow presoma, and one of which is body particles, particle size range
Being the one in 2～2.36mm, 1.7～2mm or 1.4～1.7mm, another kind is that porosity regulates and controls granule, and particle size range is DAdjust=
(0.2～0.4) DMain, according to volume ratio=1:(ξ/0.7～1 of body particles and porosity regulation and control granule) ratio mix,
Compound mixes 10～60min in blender and i.e. obtains seepage flow presoma；DMainFor the meansigma methods of the particle size range of body particles,
ξ is the porosity of target material；
(3) seepage flow presoma is placed in seepage flow mould, is preheating to 400～500 DEG C and is incubated 20～40min；
(4) aluminum or aluminum alloy melt is poured in seepage flow mould, under the air pressure of 2～5atm., aluminum or aluminum alloy melt is pressed into
In the hole of seepage flow presoma, obtain the mixture of aluminum or aluminum alloy melt and salt particle；
(5) mixture of aluminum or aluminum alloy melt Yu salt particle is cooled to room temperature, with water-soluble except NaCl granule therein, obtains
The through hole aluminum or aluminum alloy foam of porosity 78-95%.
The preparation method of high porosity through hole aluminum or aluminum alloy foam the most according to claim 1, it is characterised in that: described
The preparation of aluminum and aluminium alloy melt is aluminum or aluminum alloy is heated to above aluminum or aluminum alloy fusing point 20～40 DEG C temperature melting,
And it is incubated 20～60min.
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| CN201410181536.8A CN104004937B (en) | 2014-05-04 | 2014-05-04 | A kind of preparation method of high porosity through hole aluminum or aluminum alloy foam |
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| CN201410181536.8A CN104004937B (en) | 2014-05-04 | 2014-05-04 | A kind of preparation method of high porosity through hole aluminum or aluminum alloy foam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107794393B (en) * | 2016-09-05 | 2019-08-27 | 中南大学 | A kind of preparation method of micron-sized low porosity porous Al alloy |
| CN106702199B (en) * | 2017-01-21 | 2018-08-10 | 杨林 | A kind of preparation method of foaming aluminum material |
| CN106987787A (en) * | 2017-02-24 | 2017-07-28 | 昆明理工大学 | The preparation method of high porosity aluminium alloy/aluminium core alumina fibre composite foam |
| CN107513676A (en) * | 2017-07-05 | 2017-12-26 | 昆明理工大学 | A kind of preparation method of fiber reinforcement high porosity aluminum-base composite foam |
| CN108384975B (en) * | 2018-03-29 | 2020-02-07 | 昆明理工大学 | Preparation method of porous aluminum alloy |
| CN108671912B (en) * | 2018-04-16 | 2020-11-17 | 昆明理工大学 | Preparation method of porous pore wall porous aluminum supported nano Ag catalytic material |
| CN108411143A (en) * | 2018-06-01 | 2018-08-17 | 珠海格力电器股份有限公司 | A kind of Open-cell Aluminum Foam wind deflector and preparation method thereof |
| CN109834247A (en) * | 2019-01-14 | 2019-06-04 | 南京航空航天大学 | A kind of negative poisson's ratio open celled foam aluminum material and its Seepage Foundry preparation method |
| CN111235419B (en) * | 2020-02-24 | 2021-05-04 | 清华大学 | Porous preform and method for producing same, and foam metal and method for producing same |
| CN112126825B (en) * | 2020-08-10 | 2021-07-30 | 宁波悦威液压科技有限公司 | Hydraulic cylinder silencer and manufacturing process thereof |
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|---|---|---|---|---|
| CN1864895A (en) * | 2005-05-17 | 2006-11-22 | 上海众汇泡沫铝材有限公司 | Process for preparing through-hole foam aluminium plate |
| CN101643863A (en) * | 2009-04-04 | 2010-02-10 | 贾维 | Technology for preparing foamed aluminium with open pores by seepage pressure method |
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| FR2969938B1 (en) * | 2010-12-29 | 2013-05-24 | Filtrauto | PREFORM FOR REALIZING A METAL FOAM |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864895A (en) * | 2005-05-17 | 2006-11-22 | 上海众汇泡沫铝材有限公司 | Process for preparing through-hole foam aluminium plate |
| CN101643863A (en) * | 2009-04-04 | 2010-02-10 | 贾维 | Technology for preparing foamed aluminium with open pores by seepage pressure method |
Non-Patent Citations (1)
| Title |
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| 许玲等.渗流法制备开孔泡沫铝的结构与参数的控制.《新技术新工艺》.2004,(第2期),第43-44页. * |
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