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Low porosity closed cell foam aluminum alloy and its preparation method

A closed-cell foam and aluminum alloy technology, which is applied in the field of low-porosity closed-cell foam aluminum alloy and its preparation, can solve the problems that high-porosity foam aluminum alloy cannot meet the requirements, and achieve easy control of the process, high efficiency, and finished products The effect of rate increase

Inactive Publication Date: 2006-07-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some occasions that require higher strength and greater energy absorption capacity, high-porosity foamed aluminum alloys cannot meet the requirements

Method used

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  • Low porosity closed cell foam aluminum alloy and its preparation method
  • Low porosity closed cell foam aluminum alloy and its preparation method
  • Low porosity closed cell foam aluminum alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 A preparation method for manufacturing low-porosity closed-cell aluminum alloys, comprising the following steps:

[0024] The first step is to heat the aluminum-copper alloy containing 3.5-5.5% copper until it melts;

[0025] In the second step, add a tackifier accounting for 0.5 to 5% (for example, 1.5%) of the weight of the aluminum alloy to stir the aluminum alloy at a speed of 200 to 500 rpm (preferably 400 rpm) to increase the viscosity for 8 minutes to 15 minutes. Minutes (preferably 10 minutes), tackifier can be Ca, aluminum oxide powder, manganese dioxide powder;

[0026] The third step is to add a foaming agent accounting for 0.2-5.0% of the mass of the aluminum alloy and stir at 600-900 rpm (900 rpm is optional) for 40-60 seconds, wherein the foaming agent can be titanium hydride, pozzolan , Calcium carbonate, the addition of foaming agent can be 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 1.0%, 1.5%, 2.0%, 2.5% , 3.0%, 4.0%, 5.0%; ...

Embodiment 2

[0030] Embodiment 2 A preparation method for manufacturing low-porosity closed-cell aluminum alloys, comprising the following steps:

[0031] The first step is to heat the aluminum-copper alloy containing 3.5-5.5% copper until it melts;

[0032] In the second step, adding tackifier calcium accounting for 0.5-5% (for example, 1.5%) of the weight of the aluminum alloy is used to stir the aluminum alloy at a speed of 200-500 revolutions / minute (preferably 400 revolutions / minute) to increase viscosity for 8 minutes~ 15 minutes (preferably 10 minutes);

[0033] In the third step, add foaming agent titanium hydride accounting for 0.2-2.0% of the mass of the aluminum alloy and stir at 600-900 rpm (for example, 900 rpm) for 40-60 seconds, wherein the amount of foaming agent added can be 0.2 %, 0.25%, 0.3%, 0.35%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 1.0%, 1.5%, 2.0%;

[0034] The fourth step is to stir again at a speed of 1000 rpm to 2000 rpm for 10s to 180s. The stirring speed can be sele...

Embodiment 3

[0036] In the sixth step, the heat-preserved foamed aluminum alloy melt is simultaneously cooled in all directions to obtain a closed-cell foamed aluminum alloy. Embodiment 3 A preparation method for manufacturing low-porosity closed-cell aluminum alloys, comprising the following steps:

[0037] The first step is to heat the aluminum-copper alloy containing 3.5-5.5% copper until it melts;

[0038]In the second step, adding tackifier calcium accounting for 0.5-5% (for example, 1.5%) of the weight of the aluminum alloy is used to stir the aluminum alloy at a speed of 200-500 revolutions / minute (preferably 400 revolutions / minute) to increase viscosity for 8 minutes~ 15 minutes (preferably 10 minutes);

[0039] In the third step, add foaming agent titanium hydride accounting for 0.2 to 5.0% of the mass of the aluminum alloy and stir at 600 to 900 rpm (900 rpm is optional) for 40 to 60 seconds, wherein the amount of foaming agent added can be 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.5%,...

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Abstract

The invention discloses a low porosity closed cell foam aluminum alloy preparation method comprising the steps of, (1) heating aluminium alloy to melting, (2) charging 0.5-5% thickener, stirring the aluminium alloy to increase thickness, (3) charging foaming agent 0.2-5.0 wt% of aluminium alloy, stirring homogeneously, (4) stirring 10s-180s again, (5) extracting the stirring paddle, (6) subjecting the thermal insulated foam aluminium alloy flux to simultaneous cooling. The invention also discloses a closed cell foam aluminium alloy with low factor of porosity.

Description

1. Technical field [0001] The invention relates to a foamed aluminum alloy and a manufacturing method thereof, in particular to a low-porosity closed-cell foamed aluminum alloy and a preparation method thereof. 2. Background technology [0002] The characteristics of the existing melt foaming method to prepare foamed aluminum alloy: the shape of the hole is polyhedron, the average hole diameter is 3-5mm, the porosity is high (higher than 80%), the strength is low, and the energy absorption capacity is small. For some occasions that require higher strength and greater energy absorption capacity, high-porosity foamed aluminum alloys cannot meet the requirements. 3. Contents of the invention [0003] The invention provides closed-cell foamed aluminum alloy with high strength, spherical or quasi-spherical pores and low porosity and a preparation method thereof. [0004] The present invention adopts following technical scheme: [0005] A method for manufacturing a low-porosit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 何德坪邹毅尚金堂
Owner SOUTHEAST UNIV
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