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: 2008-01-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for through-hole porous aluminum and aluminum alloy with pore structure modulation, comprising the following steps:

[0024] In the first step, soluble chlorides or carbonates are used as filler particles, which are divided into groups according to the size of the particles; along the height direction of the mold 1, layered into the mold 1 according to the axial gradient distribution according to the size of the particles, at 500 Keep warm at ℃ for 30 minutes 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°C to 820°C, then place the mold 1 on the suction cup base 2 of the negative pressure device 3, the pressure is -2kPa, and melt the aluminum alloy The body is cast into the mold 1 to infiltrate the aluminum alloy melt into the filler particles;

[0026] In the third step, after the aluminum alloy is solidified and the alu...

Embodiment 2

[0028] A preparation method for through-hole porous aluminum and aluminum alloy with pore structure modulation, comprising the following steps:

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

[0030] The second step is to heat the aluminum alloy until it melts, and 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 infiltrate the aluminum alloy melt into the filler particles;

[0031] In the third step, after the aluminum alloy is solidified and the aluminum all...

Embodiment 3

[0033] A preparation method for through-hole porous aluminum and aluminum alloy with pore structure modulation, comprising the following steps:

[0034] In the first step, soluble chlorides or carbonates are used as filler particles, which are divided into groups according to the size of the particles; along the height direction of the mold 1, they are loaded into the mold 1 in layers according to the axial gradient distribution according to the pore size, and the temperature is 660 ° C. Keep it warm for 30 minutes to make the temperature of the filler particles uniform;

[0035] The second step is to heat the aluminum alloy until it melts, and 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 -40kPa, and melt the aluminum alloy The body is cast into the mold 1 to infiltrate the aluminum alloy melt into the filler particles;

[0036] In the third step, after the...

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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 interconnected pore structure realizes light structural material and multifunctional compatibility of sound, heat, damping and energy absorption. 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. [0003] Porous aluminum alloy has excellent acoustic performance, including sound absorption and noise reduction performance, due to its large specific surface area and good flow performance. The existing theory shows that the pore structure affects its sound absorption effect, and the pore size is 10 -1 It has better high-frequency sound absorption ability at the order of magnitud...

Claims

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Application Information

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Patent Type & Authority Applications(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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