Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming

A foamed aluminum alloy and aluminum alloy technology, which is applied in the field of secondary foaming to prepare dissolvable 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: 2009-01-07
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 for producing resolvable hollow deformed foam aluminium alloy by secondary foaming
  • Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming
  • Method for producing resolvable hollow deformed foam aluminium alloy by secondary foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The solid dissolvable preform preparation material is sintered from industrial salt (NaCl) or clay.

[0021] Example a, using saturated potassium carbonate solution as a binder, agglomerating industrial salt powder into a mold with a specific inner cavity, sintering at 200-350 degrees, and demoulding to form a solid dissolvable preform. The bonding effect is better when using saturated solution of potassium carbonate. Cracking is avoided when heating, and the surface of the prefabricated part is smooth, which is conducive to immersion in the foamed aluminum melt.

[0022] In Example b, a similar method can be used to agglomerate and sinter the clay with water to achieve the same effect.

Embodiment 2

[0024] 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;

[0025] The second step: quickly place the dissolvable ball in the foamed aluminum alloy melt and ensure that it is completely submerged in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in salt balls 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 dissolvable balls to a temperature of 300°C to 650°C for 10 to 50 minutes, so that the aluminum alloy prefor...

Embodiment 3

[0030] 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 20 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring paddle;

[0031] The second step: quickly place the dissolvable ball in the foamed aluminum alloy melt and ensure that it is completely submerged in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in salt balls to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;

[0032] Step 3: Heat the secondary foamed aluminum alloy preform with built-in dissolvable balls to a temperature of 300°C for 10 minutes so that the aluminum alloy preform can avoid the phenomenon of uneven pore size and porosity...

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Abstract

The secondary foaming process for making hollow part of foamed aluminum alloy in irregular shape includes the steps of: heating to smelt aluminum alloy and adding calcium via stirring, adding titanium hydride via stirring, setting soluble prefabricated part inside the foamed aluminum alloy melt to form closed body, cooling to obtain prefabricated part of aluminum alloy, heating and molding, cooling to obtain prefabricated part of foamed aluminum alloy, drilling holes reaching the inside of the prefabricated part of foamed aluminum alloy, and dissolving the prefabricated part to obtain foamed aluminum alloy container.

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 dissolvable hollow special-shaped part by 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 for pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 何德坪褚旭明何思渊刘伟伟
Owner SOUTHEAST UNIV
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