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A foam aluminum sandwich panel and its semi-solid thixotropic infiltration casting method

A sandwich panel and foamed aluminum technology, which is applied in the field of preparation of porous metal materials, can solve the problems of complex production equipment, long process flow, complicated process, etc., and achieves improved mechanical properties, wide application range, high compressive/tensile strength. and bond strength

Active Publication Date: 2019-04-16
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the adhesive bonding method, although the panel / core bonding strength of the foamed aluminum alloy sandwich panel prepared by the powder metallurgy method is higher, and the interface realizes metallurgical bonding, the production equipment of this method is complicated and the process is longer
In addition, no matter whether the foamed aluminum alloy sandwich panel is prepared by glue bonding or powder metallurgy, it is necessary to connect the prepared intermediate foam preform or foam with the panel, which makes the process complicated and has great limitations.

Method used

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  • A foam aluminum sandwich panel and its semi-solid thixotropic infiltration casting method
  • A foam aluminum sandwich panel and its semi-solid thixotropic infiltration casting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, a semi-solid thixotropic infiltration casting method for aluminum foam sandwich panel, which comprises the following steps:

[0034] 1) Preparing blanks, machining semi-solid non-dendritic ZL201 aluminum alloy ingots into two blanks, the blanks are cylinders with a diameter of 50mm and a height of 15mm; wherein the weight ratio of the components of the ZL201 aluminum alloy is: Cu : 4.5 ~ 5.3%, Mn: 0.6 ~ 1.0%, Ti: 0.15 ~ 0.35%, the sum of Fe and Si and other impurity elements ≤ 0.15%, the rest is Al;

[0035] 2) Prepare a prefabricated block, pre-dehydrate NaCl particles with a particle size of 6 to 16 meshes, and then place the treated NaCl particles in a prefabricated block mold for compaction to obtain a prefabricated block. The prefabricated block is 50 mm in diameter, A cylinder with a height of 10mm;

[0036] 3) Prepare the non-dendritic aluminum alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate t...

Embodiment 2

[0039] Embodiment 2, a semi-solid thixotropic seepage casting method for aluminum foam sandwich panel, which comprises the following steps:

[0040] 1) Preparing blanks, machining A356 aluminum alloy ingots with semi-solid non-dendritic structure into two blanks, the blanks are cylinders with a diameter of 50mm and a height of 15mm; wherein the weight ratio of the components of the A356 aluminum alloy is: Si : 6.5~7.5%, Mg: 0.3~0.45%, Ti: ≤0.2%, Fe: ≤0.12%, Mn: ≤0.05%, Cu: ≤0.1%, Zn: ≤0.05%, and the rest is Al;

[0041] 2) Prepare a prefabricated block, pre-dehydrate NaCl particles with a particle size of 6 to 16 meshes, and then place the treated NaCl particles in a prefabricated block mold for compaction to obtain a prefabricated block. The prefabricated block is 50mm in diameter, A cylinder with a height of 10mm;

[0042] 3) Prepare non-dendritic aluminum alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate the two billets...

Embodiment 3

[0045] Embodiment 3, a semi-solid thixotropic seepage casting method for aluminum foam sandwich panel, which comprises the following steps:

[0046] 1) Preparing blanks, mechanically processing semi-solid non-dendritic 2024 aluminum alloy ingots into two blanks, the blanks are cylinders with a diameter of 50mm and a height of 15mm; wherein the weight ratio of the components of the 2024 aluminum alloy is: Cu : 3.8-4.9%, Mg: 1.2-1.8%, Mn: 0.3-0.9%, Si: 0.5%, Fe: 0.5%, Zn: 0.25%, Ti: 0.15%, Cr: 0.1%, and the rest is Al.

[0047] 2) Prepare a prefabricated block, pre-dehydrate NaCl particles with a particle size of 6 to 16 meshes, and then place the treated NaCl particles in a prefabricated block mold for compaction to obtain a prefabricated block. The prefabricated block is 50mm in diameter, A cylinder with a height of 10mm;

[0048] 3) Prepare the non-dendritic aluminum alloy semi-solid slurry, put the billet and the prefabricated block into the percolation mold, separate the t...

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Abstract

The invention discloses a foamed aluminum sandwich board and a semi-solid-state thixotropic penetrating casting method thereof. The semi-solid-state thixotropic penetrating casting method comprises the following steps of: 1) mechanically processing aluminum alloy cast ingots with non-dendritic structures into two billets; 2) pre-dehydrating soluble salt particles, and putting the soluble salt particles into a precast block mould to compact, thereby manufacturing a precast block; 3) putting the billets and the precast block into a seepage mould, separating the two billets by the precast block,heating to a semi-solid-state temperature region, and preserving the heat; 4) penetrating, wherein aluminum alloy semi-solid-state slurry with the non-dendritic structure is simultaneously penetratedinto holes of the precast block in a thixotropic mode from the above and the below of the precast block through applied pressure, and the precast block is cooled and condensed to obtain an aluminum alloy / soluble salt particle complex; and 5) dissolving the soluble salt particles in the complex to obtain the foamed aluminum alloy sandwich board. The foamed aluminum alloy sandwich board with a controllable thickness and a uniform structure is formed once through the semi-solid-state thixotropic penetrating casting method, and a middle core layer and a metal panel are of an integrated structure.

Description

technical field [0001] The invention relates to the field of preparation of porous metal materials, in particular to an aluminum foam sandwich panel and a semi-solid thixotropic seepage casting method thereof. Background technique [0002] Due to the advantages of light weight, high specific strength and good impact performance, foamed aluminum alloy sandwich panels have broad application prospects in the fields of automobile manufacturing, aerospace and rail transportation. At present, the preparation methods of foamed aluminum alloy sandwich panels mainly include adhesive bonding method and powder metallurgy method. [0003] The adhesive bonding method mainly uses the viscous properties of the adhesive to composite the panel with the foamed aluminum alloy. However, since this method is essentially a physical connection, a reliable metallurgical bond between the core layer and the panel cannot be achieved. In addition, the adhesive bonding method also has unfavorable facto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22D25/00
Inventor 杨明波沈威武刘婧钟罗喜肖竞吴若愚邹静毕媛
Owner CHONGQING UNIV OF TECH