CN101067173A - Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming - Google Patents
Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming Download PDFInfo
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- CN101067173A CN101067173A CN 200710023582 CN200710023582A CN101067173A CN 101067173 A CN101067173 A CN 101067173A CN 200710023582 CN200710023582 CN 200710023582 CN 200710023582 A CN200710023582 A CN 200710023582A CN 101067173 A CN101067173 A CN 101067173A
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Abstract
The secondary foaming process for making hollow part of foamed aluminum alloy in irregular shape includes the steps of: heating to smelt aluminum alloy and adding calcium via stirring, adding titanium hydride via stirring, setting soluble prefabricated part inside the foamed aluminum alloy melt to form closed body, cooling to obtain prefabricated part of aluminum alloy, heating and molding, cooling to obtain prefabricated part of foamed aluminum alloy, drilling holes reaching the inside of the prefabricated part of foamed aluminum alloy, and dissolving the prefabricated part to obtain foamed aluminum alloy container.
Description
One, technical field
The invention belongs to a kind of preparation method of foam aluminium alloy, particularly a kind of secondary foamization prepares the method for soluble-type hollow abnormal member foam aluminium alloy.
Two, background technology
Prior art: the ultra-light metal construction so that closed-cell aluminum foam is attached most importance to, owing to special pore texture, realized structured material lightweight, multifunction, thereby become the focus of current space flight and hi-tech.Because automobile etc. is civilian and the demand of high-tech sector, foamed aluminium abnormal member, sandwich structure are just becoming the forward position in the foamed metal preparation field, and the foamed aluminium abnormal member that can be used as container more is not reported.Hollow abnormal member by the secondary foam preparation can be used for satisfying the application of various high-tech sectors.
Three, summary of the invention
The invention provides the method that a kind of secondary foamization prepares soluble-type hollow abnormal member foam aluminium alloy, this method mainly is used to prepare various products such as the foam aluminium alloy hollow abnormal member with complex configuration, various foam aluminium alloy containers, this method is simple, cost is low, method is reliable, and the foamed aluminium alloy product pore structure of preparation is even, controlled porosity.
Technical solution of the present invention is: a kind of secondary foamization prepares the method for soluble-type hollow abnormal member foam aluminium alloy, preparation process is: aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 0.5%～5% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 20～800 seconds; Add 0.5%～5% the titanium hydride be equivalent to aluminium alloy weight again, stir and make titanium hydride even in melt-mixing; Solid soluble prefabricated component is placed the foam aluminium alloy melt and immerses wherein the formation closed shape fully; The closed shape cooling is obtained porosity be lower than 65.5% secondary foam aluminium alloy prefabricated component; The above-mentioned secondary foam aluminium alloy prefabricated component that contains solid solubilized prefabricated component is heated under 300 ℃～650 ℃ the temperature and is incubated 10～50 minutes; Be positioned in the mould, be heated to and be incubated 5～50 minutes under 650 ℃～1200 ℃ the temperature and make the aluminium alloy prefabricated component foamed, the foam aluminium alloy after will foaming then cools off rapidly, obtains secondary foam aluminium alloy abnormal member.Hole to the center containing on the secondary foam aluminium alloy abnormal member of solubilized prefabricated component, the solubilized prefabricated component is removed, prepare the foam aluminium alloy container by the method for solvent cleaning.
The present invention obtains following technique effect:
1. utilization of the present invention is decomposed the hydrogen that produces because of titanium hydride decomposes not exclusively remaining titanium hydride in foaming process, makes aluminium alloy melt secondary foamization after the melted by heat to obtain foam aluminium alloy; The characteristics that the present invention utilizes titanium hydride thermolysis amount and temperature to be closely related, by thereby to control heat decomposition temperature be 680 ℃ and titanium hydride is done to a certain degree oxide treatment controlled thermolysis amount of titanium hydride, and guaranteed hydrogen decomposition amount in the foaming process for the second time, thereby the present invention can realize the preparation of hollow abnormal member.
2. the present invention need not a foamed aluminium alloy prefabricated component is suppressed, thereby method is simple, and cost is low.Had certain uniform pore size and porosity owing to a foamed aluminium alloy prefabricated component among the present invention, regenerated bubble and former bubble merge to grow up makes the drain age velocity of foam aluminium alloy be suppressed, thereby the pore structure of the secondary foam aluminium alloy that obtains is more even.
3. the present invention just places prefabricated components such as solid soluble ball, column and off-standard size object foam aluminium alloy melt and immersion fully in the first time in the foaming process, so just guarantees to form after the second time of foaming process inner chamber of sealing fully.
4. the present invention controls titanium hydride thermolysis amount by the oxide treatment of controlling foamed temperature and titanium hydride, the assurance titanium hydride is uniformly dispersed prerequisite in the foam aluminium alloy melt under, again prefabricated components such as solid soluble ball, column and off-standard size object are inserted, thereby make that the foamed aluminium alloy product pore structure of secondary foam preparation is even.
5. the present invention can prepare the hollow abnormal member of the different inner chambers of secondary foam bubble foam aluminium alloy of higher porosity and wide porosity ranges, realizes the change of foamed aluminium alloy product appearance profile simultaneously by the change to the shape of second time of foaming dies cavity.The foam aluminium alloy container of these secondary foam method preparations has high strength, and the characteristics of rigidity, high-energy absorption have the important application prospect.
6. the present invention carries out surface treatment to the second time of foaming prefabricated component, and the general method of polishing that adopts is removed surface scale, thereby there is the fine and close epidermis uniformly of one deck on the spherical vessel surface that can prepare, can be directly applied for various Working environments.
7. to secondary foam aluminium alloy prefabricated component heating carrying out preheating, can make the secondary foam aluminium alloy prefabricated component obtain the uniform temperature field, avoid when preparation large size second time of foaming aluminium alloy abnormal member container, occurring the second time of foaming uneven phenomenon that thermograde causes.
8. to a foamed aluminium alloy prefabricated component heating than low porosity, can make the secondary foam aluminium alloy prefabricated component melt, wherein remaining simultaneously titanium hydride decomposes generation hydrogen makes its secondary foamization, obtain secondary foam bubble foam aluminium alloy, improve Heating temperature, can make the prefabricated component rate of heating improve, can also further improve the decomposition amount of titanium hydride, and then raising foam aluminium alloy porosity, can increase thermograde again but temperature is too high, be unfavorable for even foaming, and may cause a large amount of hydrogen escapes to cause the second time of foaming failure.
9. adopt solid soluble inner matter, can in the secondary foam hollow abnormal member that will prepare, form fixedly intracavity space and keep its shape.
Four, description of drawings
Fig. 1 is the foamed aluminium foam aluminium alloy spherical vessel goods figure of secondary foam preparation, and its external diameter 10.90cm, inner chamber are spherical, diameter 5.78cm, porosity 73.07%, aperture 1-3mm.
Fig. 2 is the foam aluminium alloy spherical vessel goods and the sectional view of the secondary foam preparation of built-in solubilized ball, its external diameter 12.2cm, internal diameter, porosity 50%～90%, aperture 1-5mm.
Fig. 3 is the raw material of preparation solubilized prefabricated component: Industrial Salt and saturated solution of potassium carbonate.
Fig. 4 is the built-in solubilized prefabricated components of using of various size.
Five, embodiment
Embodiment 1
Solid solubilized prefabricated component prepares material and is formed through sintering by Industrial Salt (NaCl) or clay.
Example a makes binding agent with saturated solution of potassium carbonate, and the Industrial Salt powder agglomeration is placed the mould molding of specific inner chamber, and through 200-350 degree sintering, the demoulding forms solid solubilized prefabricated component.Adopt the saturated solution of potassium carbonate adhesive effect better. avoid cracking during heating, and preform surfaces is smooth, helps immersing the foamed aluminium melt.
Example b can adopt the similar approach water that the clay sintering of reuniting can be reached effect same.
Embodiment 2
The first step: aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 0.5%～5% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 20～800 seconds; Add 0.5%～5% the titanium hydride be equivalent to aluminium alloy weight again, stirred 20～400 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 800～5000r/m;
Second step: rapidly the solubilized ball is placed the foam aluminium alloy melt and guarantee its melt that submerges fully, form closed shape.The one step foaming foam aluminium alloy melt of built-in salt ball cooled off fast obtain porosity and be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: the secondary foam aluminium alloy prefabricated component of above-mentioned built-in solubilized ball is heated to aperture and porosity uneven phenomenon when being incubated 10～50 minutes under 300 ℃～650 ℃ the temperature and making that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the secondary foam aluminium alloy prefabricated component of above-mentioned built-in solubilized ball is positioned in the die cavity of spherical hollow mould, be heated to and be incubated 5～50 minutes under 650 ℃～1200 ℃ the temperature and make the aluminium alloy prefabricated component foamed, foam aluminium alloy after will foaming then cools off rapidly, obtains to contain the spherical secondary foam aluminium alloy of solubilized ball.
The 5th step: will contain and use bench drill to hole to the centre of sphere on the spherical secondary foam aluminium alloy of solubilized ball, diameter is that the method that 3mm passes through solvent cleaning is removed the solubilized ball, just can prepare the foam aluminium alloy spherical vessel.
Embodiment 3
The first step: aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 0.5% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 20 seconds; Add 0.5% the titanium hydride be equivalent to aluminium alloy weight again, stirred 20 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 800r/m;
Second step: rapidly the solubilized ball is placed the foam aluminium alloy melt and guarantee its melt that submerges fully, form closed shape.The one step foaming foam aluminium alloy melt of built-in salt ball cooled off fast obtain porosity and be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: aperture and porosity uneven phenomenon when secondary foam aluminium alloy prefabricated component that will above-mentioned built-in solubilized ball is heated to and is incubated 10 minutes under 300 ℃ the temperature and makes that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the secondary foam aluminium alloy prefabricated component of above-mentioned built-in solubilized ball is positioned in the die cavity of spherical hollow mould, be heated under 650 ℃ the temperature insulation and made the aluminium alloy prefabricated component foamed in 5 minutes, foam aluminium alloy after will foaming then cools off rapidly, obtains to contain the spherical secondary foam aluminium alloy of solubilized ball.
The 5th step: will contain and use bench drill to hole to the centre of sphere on the spherical secondary foam aluminium alloy of solubilized ball, diameter is 3mm, by the method for solvent cleaning the solubilized ball is removed, and just can prepare the foam aluminium alloy spherical vessel.
Embodiment 4
The first step: aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 5% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 800 seconds; Add 5% the titanium hydride be equivalent to aluminium alloy weight again, stirred 400 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 5000r/m;
Second step: rapidly the solubilized ball is placed the foam aluminium alloy melt and guarantee its melt that submerges fully, form closed shape.The one step foaming foam aluminium alloy melt of built-in salt ball cooled off fast obtain porosity and be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: aperture and porosity uneven phenomenon when secondary foam aluminium alloy prefabricated component that will above-mentioned built-in solubilized ball is heated to and is incubated 50 minutes under 650 ℃ the temperature and makes that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the secondary foam aluminium alloy prefabricated component of above-mentioned built-in solubilized ball is positioned in the die cavity of spherical hollow mould, be heated under 1200 ℃ the temperature insulation and made the aluminium alloy prefabricated component foamed in 50 minutes, foam aluminium alloy after will foaming then cools off rapidly, obtains to contain the spherical secondary foam aluminium alloy of solubilized ball.
The 5th step: will contain and use bench drill to hole to the centre of sphere on the spherical secondary foam aluminium alloy of solubilized ball, diameter is 3mm, by the method for solvent cleaning the solubilized ball is removed, and just can prepare the foam aluminium alloy spherical vessel.
Embodiment 5
The first step: aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 3% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 600 seconds; Add 3% the titanium hydride be equivalent to aluminium alloy weight again, stirred 300 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 2000r/m;
Second step: rapidly the solubilized ball is placed the foam aluminium alloy melt and guarantee its melt that submerges fully, form closed shape.The one step foaming foam aluminium alloy melt of built-in salt ball cooled off fast obtain porosity and be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: aperture and porosity uneven phenomenon when secondary foam aluminium alloy prefabricated component that will above-mentioned built-in solubilized ball is heated to and is incubated 30 minutes under 450 ℃ the temperature and makes that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the secondary foam aluminium alloy prefabricated component of above-mentioned built-in solubilized ball is positioned in the die cavity of spherical hollow mould, be heated under 900 ℃ the temperature insulation and made the aluminium alloy prefabricated component foamed in 30 minutes, foam aluminium alloy after will foaming then cools off rapidly, obtains to contain the spherical secondary foam aluminium alloy of solubilized ball.
The 5th step: will contain and use bench drill to hole to the centre of sphere on the spherical secondary foam aluminium alloy of solubilized ball, diameter is 3mm, by the method for solvent cleaning the solubilized ball is removed, and just can prepare the foam aluminium alloy spherical vessel.
Claims (1)
1. a secondary foamization prepares the method for soluble-type hollow abnormal member foam aluminium alloy, it is characterized in that preparation process is:
A. aluminium alloy is heated to fusing, add be equivalent to aluminium alloy weight 0.5%～5% calcium to molten aluminium alloy, stir and carry out increasing glutinous in 20～800 seconds; Add 0.5%～5% the titanium hydride be equivalent to aluminium alloy weight again, stir, make titanium hydride even in melt-mixing;
B. solid soluble prefabricated component is placed the foam aluminium alloy melt and immerse wherein the formation closed shape fully; The closed shape cooling is obtained porosity be lower than 65.5% secondary foam aluminium alloy prefabricated component;
C. the above-mentioned secondary foam aluminium alloy prefabricated component that contains solid solubilized prefabricated component is heated under 300 ℃～650 ℃ the temperature and is incubated 10～50 minutes;
D. be positioned in the mould, be heated to be incubated 5～50 minutes under 650 ℃～1200 ℃ the temperature and to make and the aluminium alloy prefabricated component foamed, obtain secondary foam aluminium alloy abnormal member then with its rapid cooling.
E. will contain on the secondary foam aluminium alloy abnormal member of solid solubilized prefabricated component and hole, the solubilized prefabricated component be removed, prepare the foam aluminium alloy container by the method for solvent cleaning to the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100235825A CN100449017C (en) | 2007-06-08 | 2007-06-08 | Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming |
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| CNB2007100235825A CN100449017C (en) | 2007-06-08 | 2007-06-08 | Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming |
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| CN101067173A true CN101067173A (en) | 2007-11-07 |
| CN100449017C CN100449017C (en) | 2009-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781429A (en) * | 2012-06-29 | 2015-07-15 | 法国肯联铝业 | Method for producing an aluminium alloy foam by moulding |
| CN109778036A (en) * | 2019-03-04 | 2019-05-21 | 东南大学 | A kind of foamed alloy and preparation method for foaming under space environment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482533A (en) * | 1993-01-12 | 1996-01-09 | Fuji Jukogyo Kabushiki Kaisha | Method for manufacturing foam aluminum product and product |
| JPH08209265A (en) * | 1995-02-01 | 1996-08-13 | Hitachi Cable Ltd | Production of foamed aluminum |
| CN1273630C (en) * | 2005-01-20 | 2006-09-06 | 东南大学 | Production of foamed aluminium alloy deformed piece by secondary foam |
| CN100392127C (en) * | 2006-07-05 | 2008-06-04 | 东南大学 | Method for preparing foamed aluminium alloy product by secondary foaming |
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2007
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781429A (en) * | 2012-06-29 | 2015-07-15 | 法国肯联铝业 | Method for producing an aluminium alloy foam by moulding |
| CN109778036A (en) * | 2019-03-04 | 2019-05-21 | 东南大学 | A kind of foamed alloy and preparation method for foaming under space environment |
| CN109778036B (en) * | 2019-03-04 | 2020-10-16 | 东南大学 | Foam alloy for foaming in space environment and preparation method thereof |
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| CN100449017C (en) | 2009-01-07 |
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Granted publication date: 20090107 Termination date: 20120608 |