CN100460536C - Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foam - Google Patents
Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foam Download PDFInfo
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- CN100460536C CN100460536C CNB2007100234911A CN200710023491A CN100460536C CN 100460536 C CN100460536 C CN 100460536C CN B2007100234911 A CNB2007100234911 A CN B2007100234911A CN 200710023491 A CN200710023491 A CN 200710023491A CN 100460536 C CN100460536 C CN 100460536C
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- aluminium alloy
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Abstract
The invention discloses a making method of secondary foamed non-fusing hollow heterotype foam aluminium alloy, which comprises the following steps: heating the aluminium alloy until fusing; adding calcium into the fused liquid of aluminium alloy; adding titanium hydride; stirring to make the fuse blend evenly; placing the non-fusing prefab in the foam aluminium alloy fuse until immersing completely; forming the closed body; cooling the closed body to obtain the secondary foamed aluminium alloy prefab; heating the prefab; placing the prefab in the mould; insulating; foaming the prefab; cooling the prefab rapidly; obtaining the hollow product with stable cavity space and shape.
Description
One, technical field
The invention belongs to a kind of preparation method of foam aluminium alloy, the method that particularly a kind of secondary foam preparation can not fusion 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 foam preparation can not fusion 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: the method that a kind of secondary foam preparation can not fusion 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, make titanium hydride even in melt-mixing by stirring; The hollow prefabricated component that can not fuse 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; Above-mentioned containing under the temperature that the secondary foam aluminium alloy prefabricated component is heated to 300 ℃～650 ℃ 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.
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 the hollow ball that can not fuse, 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 the hollow ball that can not fuse, 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 secondary foam aluminium alloy prefabricated component partial melting, 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 the hollow prefabricated component that can not fuse, 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 built-in foam aluminium alloy spherical vessel goods figure that can not fuse ball 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 built-in foam aluminium alloy spherical vessel goods and the sectional view that can not fuse ball of secondary foam preparation, and its external diameter 10.90cm, inner chamber are spherical diameter 5.78cm, porosity 70.64%, aperture 1-3mm.
Fig. 3 can not fuse prefabricated component for the built-in usefulness of various size.
Five, embodiment
Embodiment 1
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: can not fuse ball rapidly and place the foam aluminium alloy melt and guarantee that it immerses melt fully, and form closed shape.The built-in one step foaming foam aluminium alloy melt that does not fuse hollow ball is cooled off the acquisition porosity fast be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse 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 above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse 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 aluminum alloy container that does not fuse hollow ball.
Embodiment 2
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 200 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 800r/m;
Second step: can not fuse ball rapidly and place the foam aluminium alloy melt and guarantee that it immerses melt fully, and form closed shape.The built-in one step foaming foam aluminium alloy melt that does not fuse hollow ball is cooled off the acquisition porosity fast be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse ball is heated to aperture and porosity uneven phenomenon when being incubated 10 minutes under 300 ℃ the temperature and making that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse 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 aluminum alloy container that does not fuse hollow ball.
Embodiment 3
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: can not fuse ball rapidly and place the foam aluminium alloy melt and guarantee that it immerses melt fully, and form closed shape.The built-in one step foaming foam aluminium alloy melt that does not fuse hollow ball is cooled off the acquisition porosity fast be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse ball is heated to aperture and porosity uneven phenomenon when being incubated 50 minutes under 650 ℃ the temperature and making that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse 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 aluminum alloy container that does not fuse hollow ball.
Embodiment 4
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 500 seconds; Add 3% the titanium hydride be equivalent to aluminium alloy weight again, stirred 200 seconds, make titanium hydride even, propose stirring rake then in melt-mixing with the speed of 3000r/m;
Second step: can not fuse ball rapidly and place the foam aluminium alloy melt and guarantee that it immerses melt fully, and form closed shape.The built-in one step foaming foam aluminium alloy melt that does not fuse hollow ball is cooled off the acquisition porosity fast be lower than 65.5% secondary foam aluminium alloy prefabricated component;
The 3rd step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse ball is heated to aperture and porosity uneven phenomenon when being incubated 30 minutes under 500 ℃ the temperature and making that aluminium alloy prefabricated component is avoided the caused foaming of thermograde;
The 4th step: the above-mentioned built-in secondary foam aluminium alloy prefabricated component that does not fuse ball is positioned in the die cavity of spherical hollow mould, be heated under 1000 ℃ the temperature insulation and made the aluminium alloy prefabricated component foamed in 25 minutes, foam aluminium alloy after will foaming then cools off rapidly, obtains to contain the spherical secondary foam aluminum alloy container that does not fuse hollow ball.
Claims (1)
1. the method that a secondary foam preparation can not fusion type hollow abnormal member foam aluminium alloy 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. the hollow prefabricated component that can not fuse 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. contain the hollow prefabricated component secondary foam aluminium alloy prefabricated component that can not fuse and be heated under 300 ℃～650 ℃ the temperature and be incubated 10～50 minutes above-mentioned;
D. 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100234911A CN100460536C (en) | 2007-06-05 | 2007-06-05 | Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foam |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100234911A CN100460536C (en) | 2007-06-05 | 2007-06-05 | Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foam |
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| CN101058857A CN101058857A (en) | 2007-10-24 |
| CN100460536C true CN100460536C (en) | 2009-02-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109396394B (en) * | 2018-12-20 | 2020-12-01 | 成都洛的高新材料技术有限公司 | Composite floating body material and preparation process thereof |
| CN109778036B (en) * | 2019-03-04 | 2020-10-16 | 东南大学 | Foam alloy for foaming in space environment and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209265A (en) * | 1995-02-01 | 1996-08-13 | Hitachi Cable Ltd | Production of foamed aluminum |
| CN1644724A (en) * | 2005-01-20 | 2005-07-27 | 东南大学 | Production of foamed aluminium alloy deformed piece by secondary foam |
| CN1876862A (en) * | 2006-07-05 | 2006-12-13 | 东南大学 | Method for preparing foamed aluminium alloy product by secondary foaming |
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- 2007-06-05 CN CNB2007100234911A patent/CN100460536C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209265A (en) * | 1995-02-01 | 1996-08-13 | Hitachi Cable Ltd | Production of foamed aluminum |
| CN1644724A (en) * | 2005-01-20 | 2005-07-27 | 东南大学 | Production of foamed aluminium alloy deformed piece by secondary foam |
| CN1876862A (en) * | 2006-07-05 | 2006-12-13 | 东南大学 | Method for preparing foamed aluminium alloy product by secondary foaming |
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