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Method for preparing foam aluminium sandwich structure

A sandwich structure and foamed aluminum technology, which is applied in the field of preparing foamed aluminum sandwich structures, can solve the problems of inability to prepare special-shaped parts, only plates, and difficulties in preparing foamed aluminum sandwich panels, etc. The effect of large-scale assembly operations

Inactive Publication Date: 2012-04-18
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main methods of manufacturing foamed aluminum sandwich structures. One is to bond foamed aluminum and aluminum plates together with metal glue. The disadvantage is that it is not resistant to high temperatures and is easy to age. Only plates can be prepared, and special-shaped parts cannot be prepared; the other One method is to use powder metallurgy foaming process, the disadvantages are complex process, low efficiency, high cost, and difficulty in preparing foamed aluminum sandwich panels with high porosity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of foamed aluminum sandwich panel:

[0020] Step 1: Cut the aluminum foam into a flat plate with a size of 200mm×200mm×20mm by wire cutting.

[0021] Step 2: Derust and degrease the aluminum foam.

[0022] The third step: the K 3 AlF 6 and KAlF 4 Mix according to 1:1~2, heat to molten state, cool and crystallize, and grind the crystals into powder.

[0023] Step 4: Add the powdered crystals into water, prepare a suspension in a ratio of 1:2 by weight, and spread it evenly on the surface of the foamed aluminum.

[0024] Step 5: Put the processed aluminum foam into the mold, the cavity size of the mold is 200mm×200mm×30mm, and the distance between the aluminum foam plate and the two walls of the mold is 5mm.

[0025] Step 6: Put the mold into a furnace heated to 520°C to 585°C for 2 minutes and then take it out.

[0026] Step 7: Immediately pour the molten aluminum alloy heated to 570°C to 585°C into the mold.

[0027] In this embodiment, the compositio...

Embodiment 2

[0029] Preparation of foamed aluminum sandwich hollow tube:

[0030] Step 1: Cut the aluminum foam into a cylindrical ring with an outer ring diameter of 80 mm, an inner ring diameter of 60 mm, and a length of 300 mm by wire cutting.

[0031] Step 2: Derust and degrease the aluminum foam.

[0032] The third step: the K 3 AlF 6 and KAlF 4 Mix according to 1:1~2, heat to molten state, cool and crystallize, and grind the crystals into powder.

[0033] Step 4: Add the powdered crystals into water, prepare a suspension in a ratio of 1:2 by weight, and spread it evenly on the surface of the foamed aluminum.

[0034] Step 5: Put the processed aluminum foam into the mold, the distance between the two inner walls of the aluminum foam is 2mm, and the length is 300mm.

[0035] Step 6: Put the mold into a furnace heated to 520°C to 585°C for 2 minutes and then take it out.

[0036] Step 7: Immediately pour the molten aluminum alloy heated to 520°C to 585°C into the mold.

[0037] I...

Embodiment 3

[0039] Preparation of foamed aluminum sandwich beam:

[0040] Step 1: Cut the aluminum foam into beams of 50mm×50mm×300mm.

[0041] Step 2: Derust and degrease the aluminum foam.

[0042] The third step: the K 3 AlF 6 and KAlF 4 Mix according to 1:1~2, heat to molten state, cool and crystallize, and grind the crystals into powder.

[0043] Step 4: Add the powdered crystals into water, prepare a suspension in a ratio of 1:2 by weight, and spread it evenly on the surface of the foamed aluminum.

[0044] Step 5: Put the foamed aluminum into the mold, the size of the mold is 60mm×60mm×300mm, and the distance between the foamed aluminum and the inner wall of the mold 4 is 5mm.

[0045] Step 6: Put the mold into a furnace heated to 520°C to 585°C for 2 minutes and then take it out.

[0046] Step 7: Immediately pour the molten aluminum alloy heated to 560°C to 580°C into the mold.

[0047] In this embodiment, the composition of the aluminum alloy is (weight percent), Si: 11%, ...

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Abstract

The invention relates to a method for preparing a foam aluminium sandwich structure. Foam aluminium is processed into samples of any required size by using wire cutting or other machining methods. The method comprises the following steps: performing derusting and deoiling treatment on the surface of the foam aluminium; mixing k3AlF6 and KAlF4 in a ratio of 1:1-2, heating the mixture till the mixture is in a molten state, cooling the mixture for crystallization, grinding crystals into powder, adding water into the powder to prepare a suspension in a ratio of 1:2 to 4, and spreading the suspension on the surface of a foam aluminum work piece uniformly; and putting the treated foam aluminum work piece in a mold, placing the mold in a furnace at the temperature of between 520 and 585 DEG C, keeping the temperature for 2 minutes, taking the mold out, injecting molten alloy melt heated to 500 to 580 DEG C into the mold, and cooling the melt to obtain the foam aluminum sandwich structure. The method for preparing the foam aluminum sandwich structure has the characteristics of high preparation efficiency, simple process, low cost and easy realization of line production.

Description

technical field [0001] The invention relates to a method for preparing a foamed aluminum sandwich structure. Background technique [0002] The foamed aluminum sandwich structure is a lightweight, high specific strength, high specific stiffness structural member with foamed aluminum as the core material and solid aluminum as the surface material. Since the sandwich material is aluminum foam, it also has the properties of impact energy absorption, sound insulation, sound absorption, electromagnetic shielding, etc., realizing the multifunctionality of structural materials, and has broad application prospects. Especially when it is used as a load-bearing structure in aerospace, aviation, navigation, land and other means of transportation, it will greatly reduce energy consumption and improve transportation capacity and speed. At present, there are two main methods of manufacturing foamed aluminum sandwich structures. One is to bond foamed aluminum and aluminum plates together w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/10
Inventor 郑明军
Owner GUANGDONG OCEAN UNIVERSITY
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