CN1058058C - Process for preparing adjustable foam size foamed aluminium - Google Patents
Process for preparing adjustable foam size foamed aluminium Download PDFInfo
- Publication number
- CN1058058C CN1058058C CN96117125A CN96117125A CN1058058C CN 1058058 C CN1058058 C CN 1058058C CN 96117125 A CN96117125 A CN 96117125A CN 96117125 A CN96117125 A CN 96117125A CN 1058058 C CN1058058 C CN 1058058C
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- CN
- China
- Prior art keywords
- aluminum
- aluminium
- foamed
- metal
- tackifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
The present invention relates to a preparation method for metal foamed aluminum, which comprises the following steps: firstly, melting metal aluminum to be foamed and the alloy of the metal aluminum, coating the metal aluminum and the alloy of the metal aluminum with tackifier aluminum or waste foamed aluminum, preserving heat and stirring; then adding a foaming agent to the metal aluminum and the alloy of the metal aluminum after uniformly stirring, restirring, and preserving heat at a temperature of 600 to 700 DEG C; finally, taking the foamed aluminum out of a furnace, and cooling to obtain the foamed aluminum with a uniformly porous structure. The present invention can control the pore diameters of the prepared foamed aluminum by adjusting the addition amount of the tackifier and the preheating temperature, and can prepare the foamed aluminum with a uniform pore diameter.
Description
The present invention relates to the preparation method of metal foamed aluminium.
Foamed aluminium is a kind of porous matter metallic substance that comprises countless bubbles, and it is little to have density, and premium properties such as sound-absorbing, fire-retardant, energy-absorbing is the type material that the utmost point has application prospect.
Up to the present, the manufacture method that people study the foamed aluminium of more and tool application prospect is a foam melt method, and the main preparation process of this method is: aluminium (fine aluminium or aluminium alloy) is melted, add tackifier, stir tackify, (metal hydride is as TiH to add whipping agent again
2, ZrH
2, HfH
2Deng), whipping agent decomposes releasing hydrogen gas forms bubble in viscous melt, just obtain foamed aluminium after the cooled and solidified.
A homogeneity that important indicator is bore hole size and shape of foamed aluminium structure quality.And to obtain uniform pore structure, the tackified finish in the flux foaming process is the most key.Because viscosity is low excessively, can make subsequently the whipping agent that adds decompose the gas that produces and very easily escape, and bubble is easy to assemble in process of growth and grows up, form pore not of uniform size; And viscosity is too high, then makes whipping agent homodisperse difficulty in melt.Therefore, controlling suitable viscosity, is the important assurance that obtains even pore structure.The researchist has used multiple tackifier and tackify method for this reason, as uses the gas tackify, and gases used is O
2, Ar, N
2, air, water etc.; The powder tackify is as MnO
2, Mg, Ca, Al
2O
3Deng.But these tackify methods all have the following disadvantages:
1. required equipment is numerous and diverse.During as usefulness gas tackify, need Ignitable gas devices, gas transmission pipeline etc.;
2. easily cause foaming metal to pollute.Because of used whipping agent substantially not with the foaming metal alloying, but stay in the foamed metal, and its add-on is all bigger with the form of various inclusiones, be 0.2-8.0% as the add-on of Ca, this performance to foamed metal will have a negative impact;
3. because of viscosity increases soon, very high to technological process control requirement, be difficult for reaching;
4. used tackifier cost is higher;
5. used active tackifier such as Mg, Ca etc., easy oxidizing fire has polluted Working environment in whipping process.
The object of the invention provides a kind of above-mentioned shortcoming that can overcome, and safety, cheap, effectively tackifier and tackify method are with the foamed aluminium aperture that these tackifier and tackify method are prepared adjustable, and good uniformity.
The present invention is as tackifier with aluminium bits or waste foam aluminium.
The inventive method is, at first will treat foaming metal aluminium and alloy melting thereof, and in liquidus temperature Tm+20～40 ℃ insulation, again tackifier aluminium bits or waste foam aluminium are covered on it, the add-on of tackifier is 30～60% of total amounts, is incubated 10～30 minutes, stirs again, 500～800 rev/mins of stirring velocitys add whipping agent 0.5～2.0%TiH again after stirring
2Or ZrH
2Or HfH
2Deng.Stirred 20～60 seconds with 1500～2300 rev/mins speed again,, from stove, take out postcooling and promptly obtain the uniform foamed aluminium of pore structure 600～700 ℃ of insulations 60～300 seconds.
Theoretical foundation of the present invention is: the viscosity of liquid metal results from the internal friction between particle, when becoming uneven multiphase system if any the solid phase particle of some amount in the liquid, even will make internal friction increase viscosity increases, solid rate is high more, viscosity is just big more, when solid-state aluminium bits with waste foam aluminium joins in the melt and after stirring, the increase of solid phase particle just forms the bigger rheology melt of viscosity in the melt.Therefore, the viscosity of melt can be controlled by add-on and the soaking time of adjusting aluminium bits and waste foam aluminium.For this reason, the prepared foamed aluminium of the inventive method aperture is adjustable, and good uniformity.
Advantage of the present invention is:
1. used tackifier are consistent with matrix metal, can not pollute;
2. low production cost can make full use of waste foam aluminium, and this part aluminium is difficult to the remelting recovery;
3. tackify speed is convenient to control, and the heat-up time or the add-on that only need to change tackifier can realize;
4. there are not burning, smog and peculiar smell, environmentally safe when operating;
5. adjustable, the good uniformity in foamed aluminium aperture that makes.
In a word, the inventive method is simple, and easily row does not need huge equipment, and prepared foamed aluminium aperture is adjustable, and good uniformity is the preparation method who has the foamed aluminium of practical value and application prospect.
Embodiment:
1. with cast aluminium alloy (ZL104),, be cooled to 660～685 ℃ again, add waste foam aluminium (foaming) and account for 20～30% of total amount, stirred 30 seconds, add whipping agent Al with 500～800 rev/mins of speed with ZL104 660～700 ℃ of fusings
2O
3: TiH
2=(1.0～2.0): 1, stirred 30 seconds with 1500～2300 rev/mins speed, 650～675 ℃ of insulations 120 seconds, from stove, to take out cooling and promptly obtain foamed aluminium, its porosity is 74%, the aperture is 2.8mm.
Claims (1)
1. preparation method who prepares adjustable foam size foamed aluminium with foam melt method, it is characterized in that, to treat foaming metal aluminium and alloy melting thereof earlier, and in liquidus temperature Tm+20～40 ℃ insulation, 30～60% the aluminium bits or the waste foam aluminium that with add-on are total amount again cover on it as tackifier, be incubated 10～30 minutes, stir with 500～800 rev/mins speed, the back of waiting to stir adds 0.5～2.0% the TiH that its add-on as whipping agent is a total amount
2Or ZrH
2Or HfH
2, stirred 20～60 seconds with 1500～2300 rev/mins speed again, at last 600～700 ℃ of insulations 60～300 seconds, take out postcooling and promptly obtain the adjustable and uniform foamed aluminium of pore structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117125A CN1058058C (en) | 1996-10-10 | 1996-10-10 | Process for preparing adjustable foam size foamed aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117125A CN1058058C (en) | 1996-10-10 | 1996-10-10 | Process for preparing adjustable foam size foamed aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1179474A CN1179474A (en) | 1998-04-22 |
| CN1058058C true CN1058058C (en) | 2000-11-01 |
Family
ID=5124061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117125A Expired - Fee Related CN1058058C (en) | 1996-10-10 | 1996-10-10 | Process for preparing adjustable foam size foamed aluminium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058058C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1669688B (en) * | 2002-11-26 | 2010-05-12 | 昆明理工大学 | Continuous production method for foamed metal casting and rolling |
| CN100422363C (en) * | 2006-10-26 | 2008-10-01 | 中南大学 | Foaming device for preparing foam aluminum or foam aluminum alloy by melt foaming method |
| CN102155200A (en) * | 2011-04-21 | 2011-08-17 | 西南石油大学 | Perforator with damping and buffering functions |
| CN102704098B (en) * | 2012-01-17 | 2013-11-13 | 张家港市中孚达纺织科技有限公司 | Production process of pure-spined combed yak wool |
| CN103752350B (en) * | 2013-12-26 | 2016-02-17 | 成都新柯力化工科技有限公司 | A kind of preparation method of fretting map denitration catalyst carrier |
| CN104046827A (en) * | 2014-07-02 | 2014-09-17 | 南通志邦新材料科技有限公司 | Production process of porous aluminum alloy material |
| CN105755306A (en) * | 2015-10-14 | 2016-07-13 | 贾维 | Foamed closed-cell aluminum foam and preparation technique thereof |
| CN107217177A (en) * | 2017-05-13 | 2017-09-29 | 合肥市库仑动力安全科技有限公司 | A kind of foamed aluminium prefabricated board and attaching method thereof |
| CN107586983A (en) * | 2017-09-18 | 2018-01-16 | 尚圣杰 | A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree |
| CN110157930B (en) * | 2019-06-03 | 2021-01-26 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum-based material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379517A (en) * | 1965-10-23 | 1968-04-23 | Lor Corp | Method of making metal foam |
-
1996
- 1996-10-10 CN CN96117125A patent/CN1058058C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379517A (en) * | 1965-10-23 | 1968-04-23 | Lor Corp | Method of making metal foam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1179474A (en) | 1998-04-22 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |