Method for manufacturing foamed aluminum sandwich plate

A sandwich panel and aluminum foam technology, which is applied in the field of foam aluminum sandwich panel preparation, can solve the problems of large powder loss, low powder density at the edge, poor high temperature resistance and corrosion resistance, and achieve high thickness accuracy and plate shape. The effect of high precision and uniform foam structure

Active Publication Date: 2010-12-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, foam boards are widely used in various fields, especially aluminum foam sandwich boards have outstanding characteristics such as light weight, high specific strength and specific stiffness, good impact resistance, and good electromagnetic shielding performance. They are used in aviation, aerospace, and automobile manufacturing. , rail transit and other fields have broad application prospects. Now, the known preparation processes of aluminum foam sandwich panels mainly include gluing and powder metallurgy foaming methods. Among them, the core layer of the gluing method is mostly produced by the melt foaming method. Foamed aluminum plate, its size is easy to control, and the pore structure is relatively uniform. Its disadvantages are that the bonding strength of the glued sandwich plate is low, and its high temperature resistance and corrosion resistance are poor.
The existing preparation methods of powder metallurgy foamed preforms are hot pressing method and general rolling compounding method. In the hot pressing process, because the panel / core layer needs to rely on a long hot pressing process to achieve initial bonding, the production efficiency is low. , In addition, limited by the size of the hot pressing mold and the capacity of the press, this process cannot produce products of larger specifications
In the general rolling composite method, since the edge of the billet is a free boundary during the rolling process, the loss of powder is relatively large, and the powder density at the edge is relatively low.

Method used

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  • Method for manufacturing foamed aluminum sandwich plate

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Experimental program
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Effect test

Embodiment 1

[0038] Select: 295.5g of aluminum-silicon alloy powder (containing 12.5% ​​of silicon) (with a particle size of 200 mesh), 1.5g of foaming agent titanium hydride (with a particle size of 50 mesh), and 3g of metal magnesium powder (with a particle size of 100 mesh). The powder is put into a ball mill tank containing diamond balls, the ball / material ratio is 1:3, the ball mill tank is placed on a high-energy ball mill for mixing, the speed is 2000r / min, and the mixing time is 1h, using duralumin LY12 thin-walled Rectangular tube is used as cladding material, the tube wall thickness is 1mm, the rectangular section length is 50mm, the width is 10mm, and the rectangular tube is 100mm long. The rectangular tube is soaked in 10% NaOH solution for 10min, rinsed with clean water and dried, and then cleaned with a wire brush. The inner wall of the tube is mechanically polished, and one end of the polished rectangular tube is flattened and closed on a press, and the mixed powder is filled...

Embodiment 2

[0040]Select: aluminum-silicon alloy powder (containing 7% silicon) 292.5g (particle size is 300 mesh), foaming agent titanium hydride 3g (particle size is 100 mesh), metal magnesium powder 4.5g (particle size is 150 mesh), the above The powder is put into a ball mill tank containing diamond balls, the ball / material ratio is 1:3, the ball mill tank is placed on a high-energy ball mill for mixing, the speed is 2500r / min, and the mixing time is 1.5h. Industrial pure aluminum 1100 Thin-walled rectangular tube is used as the cladding material, the tube wall thickness is 1.5 mm, the rectangular section is 60 mm long, 8 mm wide, and the rectangular tube is 100 mm long. Soak the rectangular tube in 10% NaOH solution for 15 minutes, rinse it with clean water and dry it, then use The steel wire brush mechanically grinds the inner wall of the tube. One end of the polished rectangular tube is flattened and closed on a press, and the mixed powder is filled from the open end of the rectangu...

Embodiment 3

[0042] Selection: 288g of aluminum-silicon alloy powder (containing 3% silicon) (400 mesh in particle size), 6g of titanium hydride foaming agent (150 mesh in particle size), 6g of magnesium metal powder (200 mesh in particle size), the above various powders Put it into a ball mill tank containing diamond balls, the ball / material ratio is 1:3, put the ball mill tank on a high-energy ball mill for mixing, the speed is 3000r / min, and the mixing time is 2h. , low-carbon steel Q235A thin-walled rectangular tube is used as the cladding material, the tube wall thickness is 1.5 mm, the rectangular section is 60 mm long, 8 mm wide, and the rectangular tube is 100 mm long. Electroless nickel plating is carried out on the steel pipe, and the specific process conditions are that the composition of the plating solution is NiSO 4 ·6H 2 O 250g / L, NiCl 2 ·6H 2 o

[0043] 60g / L, H 3 BO 3 40g / L, CH 3 (CH 2 ) 11 · SO 4 Na 0.1g / L, C 7 h 5 NO 3 S 1.0g / L, C 4 h 6 o 2 0.1g / L, the ...

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Abstract

The invention relates to a method for manufacturing a foamed aluminum sandwich plate, which belongs to the field of porous foam metal and laminar composite materials. The method comprises the following steps of: uniformly mixing aluminum-silicon alloy powder prepared by an atomization method, and foaming agent titanium hydride powder and metal magnesium powder in a certain ratio; filling the powder into a thin-wall steel (or aluminum alloy) tube with one sealed end; sealing the other end of the tube after powder filling and preparing a rolled blank; rolling and compounding at a slow speed on a cold rolling mill; trimming an obtained composite plate and cutting a foamed preformed blank according to the size of a foaming mold; foaming the preformed blank in a steel mold in a limited way; adjusting foaming temperature and foaming time as required; and foaming at a high temperature for a short period of time to obtain a high-quality foamed aluminum sandwich plate with a uniform foam structure in a core layer, good interface bonding, high thickness accuracy and excellent plate profile. The method has the outstanding characteristics of low equipment requirement, high plate profile accuracy of a product, high three-point bending strength and the like and is advantaged technology suitable for mass industrial production of foamed aluminum sandwich structural materials.

Description

technical field [0001] The invention belongs to the technical field of porous foamed metal materials and layered composite materials, and in particular relates to a method for preparing a foamed aluminum sandwich panel. Background technique [0002] At present, foam boards are widely used in various fields, especially aluminum foam sandwich boards have outstanding characteristics such as light weight, high specific strength and specific stiffness, good impact resistance, and good electromagnetic shielding performance. They are used in aviation, aerospace, and automobile manufacturing. , rail transit and other fields have broad application prospects. Now, the known preparation processes of aluminum foam sandwich panels mainly include gluing and powder metallurgy foaming methods. Among them, the core layer of the gluing method is mostly produced by the melt foaming method. Foamed aluminum plate, its size is easy to control, and the pore structure is relatively uniform. Its dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/10
Inventor 祖国胤姚广春宋滨娜王磊关志昊李鸿张敏李小兵
Owner NORTHEASTERN UNIV
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