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Pore structure modulating through-hole porous aluminum and aluminum alloy and preparation method thereof

A technology of aluminum alloy and porous aluminum, applied in the field of porous aluminum and aluminum alloy and its preparation, to achieve the effect of good sound absorption performance and excellent noise reduction performance

Inactive Publication Date: 2009-06-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the research focuses on the preparation and properties of unmodulated porous aluminum alloys, but porous aluminum alloys with axial gradient distribution or layered periodic distribution have not been reported.

Method used

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  • Pore structure modulating through-hole porous aluminum and aluminum alloy and preparation method thereof
  • Pore structure modulating through-hole porous aluminum and aluminum alloy and preparation method thereof
  • Pore structure modulating through-hole porous aluminum and aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing porous aluminum and aluminum alloy with modulated pore structure, including the following steps:

[0024] The first step is to use soluble chloride or carbonate as the filler particles and divide them into groups according to the particle size; along the height of the mold 1, according to the axial gradient distribution of the particle size, it is loaded into the mold 1 in layers. Keep the temperature for 30 minutes at ℃ to make the temperature of the filler particles uniform;

[0025] The second step is to heat the aluminum alloy to melt, keep the temperature of the aluminum alloy melt at 700 ℃ ~ 820 ℃, and then place the mold 1 on the suction cup base 2 of the negative pressure device 3 at a pressure of -2 kPa, and melt the aluminum alloy The body is cast into the mold 1 to make the aluminum alloy melt penetrate into the filler particles;

[0026] In the third step, after the aluminum alloy is solidified, when the aluminum alloy melt is cooled to ro...

Embodiment 2

[0028] A method for preparing porous aluminum and aluminum alloy with modulated pore structure, including the following steps:

[0029] In the first step, soluble chloride or carbonate is used as filler particles, which are divided into groups according to the size of the particle size; along the height direction of the mold 1, according to the axial gradient distribution of the pore size, it is loaded into the mold 1 in layers at 580℃ Keep holding for 30 minutes to make the temperature of the filler particles uniform;

[0030] The second step is to heat the aluminum alloy to melt, keep the temperature of the aluminum alloy melt at 700°C to 820°C, then place the mold 1 on the suction cup base 2 of the negative pressure device 3 at a pressure of -20kPa, and melt the aluminum alloy The body is cast into the mold 1 to make the aluminum alloy melt penetrate into the filler particles;

[0031] In the third step, after the aluminum alloy is solidified, when the aluminum alloy melt is co...

Embodiment 3

[0033] A method for preparing porous aluminum and aluminum alloy with modulated pore structure, including the following steps:

[0034] The first step is to use soluble chloride or carbonate as the filler particles, and divide them into groups according to their particle size; along the height direction of the mold 1, according to the axial gradient distribution of the pore size, it is loaded into the mold 1 in layers at 660°C Keep holding for 30 minutes to make the temperature of the filler particles uniform;

[0035] The second step is to heat the aluminum alloy to melt, keep the temperature of the aluminum alloy melt at 700 ℃ ~ 820 ℃, and then place the mold 1 on the suction cup base 2 of the negative pressure device 3 at a pressure of -40 kPa, and melt the aluminum alloy The body is cast into the mold 1 to make the aluminum alloy melt penetrate into the filler particles;

[0036] In the third step, after the aluminum alloy is solidified, when the aluminum alloy melt is cooled ...

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Abstract

The invention discloses a preparation method of porous aluminum and aluminum alloy with pore structure-variable pores, which comprises: the first step: using soluble chloride or carbonate as filler particles and dividing into several groups according to the particle size, packing into dies in the order of particle size, and incubating at 500-660 DEG C for 30-60 min; the second step: heating an aluminum alloy until molten, keeping the temperature of molten aluminum alloy at 700-820 DEG C, and placing the dies on the pedestal of a sucking disk of a vacuum device (with a pressure of -2 to -40 KPa), and casting molten aluminum alloy in the dies; and the third step: allowing the solidification of molten aluminum alloy, taking out the composite of filler particles and aluminum alloy, and removing the filler particles, to obtain porous aluminum and aluminum alloy with pore structure-variable pores.

Description

Technical field [0001] The invention relates to the field of metal material processing, in particular to a porous aluminum and aluminum alloy and a preparation method thereof. Background technique [0002] The porous aluminum alloy with connected pore structure realizes the light weight of the structural material and the multi-functional compatibility of sound, heat, damping, and energy absorption. So far, the preparation and properties of unmodulated porous aluminum alloys have been the focus of research, and porous aluminum alloys with pore diameters distributed according to axial gradient or layered periodic distribution have not been reported. [0003] Porous aluminum alloy has excellent acoustic properties due to its large specific surface area and good circulation performance, including sound absorption and noise reduction properties. The existing theory shows that the pore structure affects its sound absorption effect, and the pore size is 10 -1 In the order of magnitude, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22D23/04B22D21/04
Inventor 何德坪黄可刘伟伟何思渊王联凤顾菲菲
Owner SOUTHEAST UNIV
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