Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foaming

A foamed aluminum alloy and aluminum alloy technology, which is applied in the field of secondary foaming to prepare insoluble hollow special-shaped foamed aluminum alloys, can solve the problems that foamed aluminum special-shaped parts have not been reported, and achieve low cost, uniform pore structure, and method simple effect

Inactive Publication Date: 2009-02-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the needs of civil and high-tech fields such as automobiles, aluminum foam special-shaped parts and sandwich structures are becoming the forefront in the field of metal foam preparation, and foam aluminum special-shaped parts that can be used as containers have not been reported.

Method used

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  • Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foaming
  • Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foaming
  • Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foaming

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 0.5% to 5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 20 to 800 seconds to increase viscosity; then add calcium equivalent to the weight of the aluminum alloy Stir 0.5% to 5% titanium hydride at a speed of 800 to 5000r / m for 20 to 400 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring blade;

[0020] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;

[0021] Step 3: Heat the secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 300°C to 650°C for 10 to 50 minutes, so that the alumi...

Embodiment 2

[0024] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 0.5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 20 seconds to increase viscosity; then add 0.5% of the weight of the aluminum alloy to titanium hydride , stirring at a speed of 800r / m for 200 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring paddle;

[0025] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;

[0026] Step 3: Heat the secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 300°C for 10 minutes so that the aluminum alloy preform can avoid the phenomenon of uneven pore ...

Embodiment 3

[0029] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 800 seconds to increase viscosity; then add titanium hydride equivalent to 5% of the weight of the aluminum alloy , stirring at a speed of 5000r / m for 400 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring paddle;

[0030] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;

[0031] Step 3: Heat the secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 650°C for 50 minutes so that the aluminum alloy preform can avoid the phenomenon of une...

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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

1. Technical field [0001] The invention belongs to a method for preparing a foamed aluminum alloy, in particular to a method for preparing a foamed aluminum alloy for a non-meltable hollow special-shaped part through secondary foaming. 2. Background technology [0002] Existing technology: The ultra-light metal structure focusing on closed-cell foamed aluminum, due to the special pore structure, realizes light weight and multi-functional structural materials, thus becoming a hot spot in aerospace and high technology. Due to the needs of civil and high-tech fields such as automobiles, aluminum foam special-shaped parts and sandwich structures are becoming the forefront in the field of metal foam preparation, and foam aluminum special-shaped parts that can be used as containers have not been reported. Hollow profiled parts prepared by secondary foaming can be used to meet various high-tech applications. 3. Contents of the invention [0003] The invention provides a method o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22D21/04
Inventor 何德坪褚旭明何思渊张勇明卢天健
Owner SOUTHEAST UNIV
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