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Preparation method of foamed aluminum sandwich plate

A sandwich panel and foamed aluminum technology, which is applied in the field of layered composite material preparation, can solve the problems of difficult control of the thickness of the foamed aluminum sandwich panel and the structure of the core layer, complex production equipment, and high production cost, achieving rapid preparation and short cooling time , Improve the effect of mechanical properties

Active Publication Date: 2012-03-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above prior art, due to the use of powder metallurgy and liquid phase casting and rolling, the production equipment is complicated, the process flow is long, the production cost is high, and the thickness and core layer structure of the aluminum foam sandwich panel are not easy to control

Method used

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  • Preparation method of foamed aluminum sandwich plate
  • Preparation method of foamed aluminum sandwich plate
  • Preparation method of foamed aluminum sandwich plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take Al-12wt.% Si as the aluminum alloy matrix, melt it at 750°C and keep it warm for 30 minutes, add the tackifier metal Ca and stir evenly. The amount of Ca added is 5wt.% of the aluminum alloy used, and the particle size is 6mm. Stir The speed is 1500r / min, and the stirring time is 2min. Reduce the temperature of the aluminum alloy melt after viscosification to 600 °C, and add TiH to it 2 and stir well. Stirring speed is 1000r / min, stirring time is 5min, TiH 2 The particle size is 150μm, and the amount added is 0.5wt.% of the mass of the matrix alloy used. Before adding, TiH 2 Oxidation treatment was carried out at 500° C. for 5 hours in air. Casting the obtained aluminum melt into an ingot and rolling it in a hot state to obtain a foamable preform with a thickness of 5mm, the porosity of the foamable preform is 20%;

[0036] Degrease and derust the surface of the steel plate with a thickness of 1mm to expose the clean substrate surface, and then coat the surface...

Embodiment 2

[0039] Example 2 is the same as in Example 1, except that the amount of Ca added is 2wt.% of the quality of the aluminum alloy used, the stirring speed is 500r / min, and the stirring time is 5min; TiH 2 The amount of addition is 3wt.% of the mass of the matrix alloy used, the stirring speed is 3000r / min, the stirring time is 2min, TiH 2 The particle size is 30 μm, before adding the TiH 2 Oxidation treatment was carried out at 500° C. for 1 hour in air.

Embodiment 3

[0041] Use Al-12wt.%Si-1wt.%Mg as the aluminum alloy matrix, melt it at 750°C and keep it warm for 30min, add SiC particles and stir evenly, the amount of SiC added is 2wt.% of the quality of the aluminum alloy used, and the particle size is 10μm , the stirring speed is 1500r / min, and the stirring time is 2min. Reduce the temperature of the aluminum alloy melt after viscosification to 590 °C, and add TiH to it 2 and stir well. Stirring speed is 2000 r / min, stirring time is 3min, TiH 2 The particle size is 80μm, and the amount added is 1.5wt.% of the mass of the matrix alloy used. Before adding, TiH 2 Oxidation treatment at 500°C for 3 hours. The obtained aluminum melt is cast into an ingot and rolled in a hot state to obtain a foamable preform with a thickness of 10mm, and the porosity of the foamable preform is 17%;

[0042] Degrease and derust the surface of the steel plate with a thickness of 1mm to expose the clean substrate surface, and then coat the surface of the st...

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Abstract

The invention relates to a preparation method of a layered composite material, in particular to a preparation method of a foamed aluminum sandwich plate. The method comprises the following steps of: firstly, uniformly mixing an aluminum alloy, a tackifier and a foaming agent to obtain a platy or blocky foamable precast blank material; then, performing hot-pressing compounding of the precast blankand a steel plate after the surface plating to obtain a foamable composite plate sandwiching the precast blank; placing the foamable composite plate sandwiching the precast blank in a mould sleeve closed around, and delivering into an infrared foaming furnace heating at the upper and lower parts at the same time so as to heat and foam the composite plate sandwiching the precast blank under infrared radiation; and finally, pulling the mould sleeve out of the foaming furnace, and cooling to obtain a foamed aluminum sandwich plate with a fixed thickness. The foamed aluminum sandwich plate prepared by the method provided by the invention has an accurate thickness, a uniform structure and a high yield; and moreover, the preparation processes in the invention can be automatically controlled, thereby being favorable for realizing semi-continuous preparation of the foamed aluminum sandwich plate.

Description

technical field [0001] The invention relates to a method for preparing a layered composite material, in particular to a method for preparing a foamed aluminum sandwich panel. Background technique [0002] The sandwich composite structure made of foamed aluminum as the core material and steel plate as the panel is referred to as the foamed aluminum sandwich panel. The foamed aluminum sandwich panel has the characteristics of light weight, high specific stiffness, high specific strength and shock absorption and energy absorption. It has broad application prospects in fields such as transportation, aerospace and construction. [0003] The existing methods for preparing foamed aluminum sandwich panels include powder metallurgy and melt secondary foaming. The document "Aluminum Foam Sandwich Panels: Manufacture, Metallurgy and Applications" discloses a method for preparing aluminum foam sandwich panels with a size of 1m×2m by powder metallurgy. In this method, the aluminum powd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/20B32B37/06B32B37/10C22C1/08
Inventor 罗洪杰姚广春刘宣汉张晓明吴林丽曹卓坤
Owner NORTHEASTERN UNIV
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