CN101182608A - Preparation method of small pore diameter foamed aluminium - Google Patents
Preparation method of small pore diameter foamed aluminium Download PDFInfo
- Publication number
- CN101182608A CN101182608A CNA2007100664464A CN200710066446A CN101182608A CN 101182608 A CN101182608 A CN 101182608A CN A2007100664464 A CNA2007100664464 A CN A2007100664464A CN 200710066446 A CN200710066446 A CN 200710066446A CN 101182608 A CN101182608 A CN 101182608A
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- Prior art keywords
- aluminum
- foaming
- stirring
- foamed aluminium
- pore diameter
- Prior art date
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000011148 porous material Substances 0.000 title claims description 28
- 239000004411 aluminium Substances 0.000 title claims description 24
- 238000005187 foaming Methods 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 34
- 238000009413 insulation Methods 0.000 claims description 16
- 239000002667 nucleating agent Substances 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- -1 titanium hydride Chemical compound 0.000 claims description 8
- 229910000048 titanium hydride Inorganic materials 0.000 claims description 8
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000010301 surface-oxidation reaction Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000002318 adhesion promoter Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 241000209456 Plumbago Species 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
A method for preparing a small-aperture foam aluminum belongs to the preparation field of the porous metal material. The process steps of the invention are that after aluminum or aluminum alloy is melted, adhesion promoter and grains of core-forming agent of TiO<2> are added for mixing; and then the vesicant of TiH<2> which is oxidated is added into the molten mixture for mixing and dispersing; and then the small-aperture foam aluminum is obtained after the processes of mixing and foaming, heat preservation and foaming and cooling. The invention can realize the fined foam aluminum aperture and uniformization of the hole structure; moreover, the invention has simple process and is fit for large-scale production.
Description
Technical field
The invention belongs to the preparation field of porous foam metal material, particularly a kind of small pore diameter foamed aluminium preparation methods.
Background technology
Foamed aluminium has light weight, high specific strength, sound-absorbing, damping, insulation, characteristic such as heat insulation, in fields such as building, automobile, decoration, space flight and aviation, boats and ships, noise control, vibroshocks huge market potential is arranged all.
At present, the mean pore size of known flux foaming foamed aluminium is 3mm～6mm, and existing studies show that is when the foamed aluminium mean pore size is reduced to 1mm when following, the macroscopic pores structural inhomogeneity of foamed aluminium reduces, and the mechanical property of foamed aluminium and energy absorption improve.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of small pore diameter foamed aluminium; it can realize the refinement in foamed aluminium aperture; obtain mean pore size less than 1mm, the uniform foamed aluminium of pore structure, it is simple to have technology simultaneously, is fit to the characteristics of large-scale production.
Processing step of the present invention is: add tackifier Ca and nucleating agent TiO in aluminum or aluminum alloy fusing back
2Particle stirs, after will be through the whipping agent TiH of pre-oxidation treatment
2Add the melt dispersed with stirring, continue to get small pore diameter foamed aluminium after stirring foaming, thermal insulation foaming, the cooling.
The present invention also comprises following technical scheme: each component ratio that 1. prepares small pore diameter foamed aluminium is: the tackifier calcium metal is 1wt.%～4wt.%, nucleating agent TiO
2For 0.2wt.%～2wt.%, whipping agent titanium hydride are 0.5wt.%～2.5wt.%, surplus is an aluminum or aluminum alloy; Nucleating agent TiO
2Granularity be-300 orders, the granularity of whipping agent titanium hydride is-100 orders～-500 orders, and whipping agent pre-oxidation treatment method is, earlier at 400 ℃ of following heating surface oxidation 5～20h, then is warming up to 450 ℃～600 ℃ insulation 1～3h; 2. the aluminum or aluminum alloy temperature of fusion is higher than 50 ℃～200 ℃ of melting point metals, melting and heat preservation time: 20min.～60min.; 3. tackifier calcium and nucleating agent TiO
2Speed with 500rpm～5000rpm behind the adding metal melt stirs 5min.～15min.; 4. the whipping agent dispersed with stirring time is 10s～100s, and speed is 2000rpm～5000rpm; The time of 5. continue stirring foaming is 10s～100s, stirring velocity 500rpm～2000rpm, stir blowing temperature than aluminum or aluminum alloy temperature of fusion low 10 ℃～20 ℃; 6. the thermal insulation foaming temperature is identical with the stirring blowing temperature, and the thermal insulation foaming time is 30s～200s.
Adopt the whipping agent of pre-oxidation treatment, can make that whipping agent decomposition starting temperature after the processing improves, the beginning resolving time postpones, for whipping agent provides the homodisperse time in dispersed with stirring, and, realize that whipping agent disperses, decomposes the coordination of (foaming) for foaming process provides competent gas forming amount.
In molten aluminium, add nucleating agent TiO
2Particle can provide more bubble heterogeneous nucleation core, improves the nucleation rate of bubble, helps the refinement of bubble structure.
After the whipping agent dispersed with stirring, continue to stir foaming, the bubble that initially generates constantly can be broken into tiny bubble, also be beneficial to the refinement of bubble structure.
The invention has the beneficial effects as follows: (1) adds nucleating agent TiO by the whipping agent of employing pre-oxidation treatment, in molten aluminium on the basis of conventional flux foaming technology
2Particle, three technique means of stirring foaming can effectively realize the preparation of small-bore, even structure foamed aluminium, improve the mechanical property and the energy absorption of foamed aluminium.Prepared foamed aluminium technical indicator can reach: mean pore size: 0.5mm～1mm; Porosity: 60%～80%; The pore structure homogeneity: the bottom does not have the liquid collecting solid layer, and vertically the mean pore size difference is less than 30% of mean pore size; (2) appointed condition is simple, can accomplish scale production.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Embodiment one:
The ZLD104 alloy adds the calcium of 2wt.% and the TiO of 0.5wt.% be heated to 680 ℃ of fusings, insulation 30min. in plumbago crucible after
2(granularity is-300 orders) stirred (stirring velocity 4000rpm, churning time 10min) tackify and disperseed nucleating agent TiO melt
2With titanium hydride (2wt.%, granularity-200 order, through 400 ℃ of 5h+500 ℃ of 2h pre-oxidation treatment) join in the melt, dispersed with stirring (stirring velocity 4000rpm, churning time 25s), keep melt temperature at 670 ℃, adopt stirring at low speed foaming (800rpm afterwards, churning time 20s), take out stirring-head and thermal insulation foaming 90s, take out the plumbago crucible air cooling, can obtain that mean pore size 0.9mm, porosity 75%, bottom do not have the liquid collecting solid layer, vertically the mean pore size difference is less than 30% foamed aluminium of mean pore size to room temperature.
Embodiment two:
The AlSi5 alloy adds the calcium of 2.5wt.% and the TiO of 0.8wt.% be heated to 700 ℃ of fusings, insulation 20min. in plumbago crucible after
2(granularity is-300 orders), melt is stirred (stirring velocity 2000rpm, churning time 18min) tackify and disperse whipping agent, with titanium hydride (1.6wt.%, granularity-300 order, through 400 ℃ of 6h+550 ℃ of 1.5h pre-oxidation treatment) join in the melt, dispersed with stirring (stirring velocity 3000rpm, churning time 35s), keeps melt temperature, adopt stirring at low speed foaming (600rpm afterwards at 690 ℃, churning time 25s), take out stirring-head and thermal insulation foaming 70s, take out the plumbago crucible air cooling, can obtain mean pore size 0.8mm to room temperature, porosity 70%, the no liquid collecting solid layer in bottom, vertically the mean pore size difference is less than 30% foam aluminium alloy of mean pore size.
Embodiment three:
Fine aluminium adds the calcium of 3.0wt.% and the TiO of 1.0wt.% be heated to 730 ℃ of fusings, insulation 40min. in plumbago crucible after
2(granularity is-300 orders), melt is stirred (stirring velocity 2500rpm, churning time 15min) tackify and disperse whipping agent, with titanium hydride (1.4wt.%, granularity-300 order, through 400 ℃ of 7h+575 ℃ of 1h pre-oxidation treatment) join in the melt, dispersed with stirring (stirring velocity 2500rpm, churning time 40s), keeps melt temperature, adopt stirring at low speed foaming (700rpm afterwards at 710 ℃, churning time 30s), take out stirring-head and thermal insulation foaming 50s, take out the plumbago crucible air cooling, can obtain mean pore size 0.6mm to room temperature, porosity 68%, the no liquid collecting solid layer in bottom, vertically the mean pore size difference is less than 30% foam aluminium alloy of mean pore size.
Claims (2)
1. the preparation method of a small pore diameter foamed aluminium is characterized in that processing step is: add tackifier calcium and nucleating agent TiO in aluminum or aluminum alloy fusing back
2Particle stirs, be evenly distributed on melt after, will add melt through the whipping agent titanium hydride of pre-oxidation treatment, dispersed with stirring continues to stir foaming, thermal insulation foaming, cool off small pore diameter foamed aluminium.
2. the preparation method of small pore diameter foamed aluminium according to claim 1, it is characterized in that: each component ratio that 1. prepares small pore diameter foamed aluminium is: the tackifier calcium metal is 1wt.%～4wt.%, nucleating agent TiO
2For 0.2wt.%～2wt.%, whipping agent titanium hydride are 0.5wt.%～2.5wt.%, surplus is an aluminum or aluminum alloy; Nucleating agent TiO
2Granularity be-300 orders, the granularity of whipping agent titanium hydride is-100 orders～-500 orders, and whipping agent pre-oxidation treatment method is, earlier at 400 ℃ of following heating surface oxidation 5～20h, then is warming up to 450 ℃～600 ℃ insulation 1～3h; 2. the aluminum or aluminum alloy temperature of fusion is higher than 50 ℃～200 ℃ of melting point metals, melting and heat preservation time: 20min.～60min.; 3. tackifier calcium and nucleating agent TiO
2Speed with 500rpm～5000rpm behind the adding metal melt stirs 5min.～15min.; 4. the whipping agent dispersed with stirring time is 10s～100s, and speed is 2000rpm～5000rpm; The time of 5. continue stirring foaming is 10s～100s, stirring velocity 500rpm～2000rpm, stir blowing temperature than aluminum or aluminum alloy temperature of fusion low 10 ℃～20 ℃; 6. the thermal insulation foaming temperature is identical with the stirring blowing temperature, and the thermal insulation foaming time is 30s～200s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100664464A CN101182608B (en) | 2007-12-12 | 2007-12-12 | Preparation method of small pore diameter foamed aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100664464A CN101182608B (en) | 2007-12-12 | 2007-12-12 | Preparation method of small pore diameter foamed aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101182608A true CN101182608A (en) | 2008-05-21 |
| CN101182608B CN101182608B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100664464A Expired - Fee Related CN101182608B (en) | 2007-12-12 | 2007-12-12 | Preparation method of small pore diameter foamed aluminium |
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| CN (1) | CN101182608B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838754A (en) * | 2010-05-28 | 2010-09-22 | 昆明理工大学 | Method for preparing foamed aluminum/aluminum alloy by foaming through zinc evaporation |
| CN101838753A (en) * | 2010-05-28 | 2010-09-22 | 昆明理工大学 | Method for preparing foamed aluminum/aluminum alloy by evaporation foaming of magnesium |
| CN103667764A (en) * | 2013-12-30 | 2014-03-26 | 昆明理工大学 | Preparation method of zinc-aluminum alloy foam |
| CN105385874A (en) * | 2015-10-26 | 2016-03-09 | 昆明理工大学 | Melt continuous foaming preparing method for small-diameter foamed aluminum |
| CN106399737A (en) * | 2016-09-14 | 2017-02-15 | 郑州峰泰纳米材料有限公司 | Preparation method of small-aperture foamed aluminium |
| 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 |
| CN107217176A (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 aluminum materials with high capability of electromagnetic shielding |
| CN107245611A (en) * | 2017-06-19 | 2017-10-13 | 界首市中源汽车修造有限公司 | A kind of automobile foam aluminium plate and its foam process |
| CN107675015A (en) * | 2017-10-11 | 2018-02-09 | 中国民航大学 | A kind of closed pore CNTs/Al Si composite foam materials and preparation method thereof |
| CN107760905A (en) * | 2017-10-23 | 2018-03-06 | 江苏大学 | A kind of ZrB2The preparation method of particle reinforced aluminum foam/aluminium alloy |
| CN112355239A (en) * | 2020-11-03 | 2021-02-12 | 中信戴卡股份有限公司 | Preparation method of foamed aluminum special-shaped part |
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| CN102773302A (en) * | 2012-08-03 | 2012-11-14 | 广西大学 | Continuous preparation method for foamed aluminum rod |
| CN107442770B (en) * | 2017-08-31 | 2019-03-08 | 安徽青花坊瓷业股份有限公司 | A kind of preparation process and its application of the aluminium powder that foams |
-
2007
- 2007-12-12 CN CN2007100664464A patent/CN101182608B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838754A (en) * | 2010-05-28 | 2010-09-22 | 昆明理工大学 | Method for preparing foamed aluminum/aluminum alloy by foaming through zinc evaporation |
| CN101838753A (en) * | 2010-05-28 | 2010-09-22 | 昆明理工大学 | Method for preparing foamed aluminum/aluminum alloy by evaporation foaming of magnesium |
| CN101838754B (en) * | 2010-05-28 | 2013-01-16 | 昆明理工大学 | Method for preparing foamed aluminum/aluminum alloy by foaming through zinc evaporation |
| CN103667764A (en) * | 2013-12-30 | 2014-03-26 | 昆明理工大学 | Preparation method of zinc-aluminum alloy foam |
| CN105385874B (en) * | 2015-10-26 | 2017-04-12 | 昆明理工大学 | Melt continuous foaming preparing method for small-diameter foamed aluminum |
| CN105385874A (en) * | 2015-10-26 | 2016-03-09 | 昆明理工大学 | Melt continuous foaming preparing method for small-diameter foamed aluminum |
| CN106399737A (en) * | 2016-09-14 | 2017-02-15 | 郑州峰泰纳米材料有限公司 | Preparation method of small-aperture foamed aluminium |
| 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 |
| CN107217176A (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 aluminum materials with high capability of electromagnetic shielding |
| CN107245611A (en) * | 2017-06-19 | 2017-10-13 | 界首市中源汽车修造有限公司 | A kind of automobile foam aluminium plate and its foam process |
| CN107245611B (en) * | 2017-06-19 | 2018-06-19 | 界首市中源汽车修造有限公司 | A kind of automobile foam aluminium plate and its foam process |
| CN107675015A (en) * | 2017-10-11 | 2018-02-09 | 中国民航大学 | A kind of closed pore CNTs/Al Si composite foam materials and preparation method thereof |
| CN107760905A (en) * | 2017-10-23 | 2018-03-06 | 江苏大学 | A kind of ZrB2The preparation method of particle reinforced aluminum foam/aluminium alloy |
| CN112355239A (en) * | 2020-11-03 | 2021-02-12 | 中信戴卡股份有限公司 | Preparation method of foamed aluminum special-shaped part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101182608B (en) | 2010-06-16 |
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Granted publication date: 20100616 Termination date: 20121212 |