Foamed aluminium material

A foamed aluminum and aluminum liquid technology, applied in the field of foamed aluminum materials, can solve the problems of increasing energy consumption, affecting quality and quantity, poor hardness of foamed aluminum materials, etc., achieving fast and uniform percolation speed, reducing preparation costs, and strong sound-absorbing effect Effect

Inactive Publication Date: 2007-08-22
贾修实
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its problems are: the independent bubbles produced by the independent bubble type have very few holes connecting the bubbles in the casting body, the natural absorption volume is poor, there will be a large number of semicircular bodies on the surface, and there are many sound resistance. phenomenon, and the hydride blowing agent is difficult to stir evenly in the metal aluminum liquid
Its disadvantage is that due to the appearance shape and production method of the salt particles, independent bubbles cannot be formed at all
The use of this material is limited by the shape of the foam
In addition, salt particles are used as fillers, and industrial salt is highly corrosive, resulting in poor hardness and bending resistance of foamed aluminum.
Because the particle infiltration method is used in production, the temperature of the infiltrated aluminum liquid should be kept close to that of the salt particles, and the salt particles need to be preheated. Since the salt particles themselves have a large amount of water, they are easy to harden during preheating, and the salt powder will appear. , which greatly affects the quality and quantity of
And when the salt particles are preheated, it takes a long time to remove the moisture of the salt first, and then heat up and preheat before it can be implemented, which invisibly increases the consumption of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mixed rare earths are used as fillers, the mixed rare earths include 80% kaolin, 7% white carbon black, 9% expansive clay and 4% calcium carbonate, by weight, the mixed rare earths are manufactured into rare earths with a granulator Balls, the rare earth balls are naturally air-dried.

[0027] Preheat the mold and rare earth balls. The preheating temperature is 550°C, which is close to the temperature to be infiltrated into the molten aluminum. The size of the mold used is 300mm×300mm. Use an air compressor to pressurize the molten aluminum at 0.5 to 10 Infiltrate into the gap of rare earth balls within seconds, the ratio of rare earth balls to aluminum liquid is 3:1, the aluminum liquid is made of 97% industrial pure aluminum, after cooling, take out the casting, and clean the rare earth balls with an aqueous solution at 45°C to 65°C. All the rare earth balls are washed out from the casting, and then the foamed aluminum material is obtained.

Embodiment 2

[0029] Mixed rare earths are used as fillers, the mixed rare earths include 85% kaolin, 5% white carbon black, 7% expansive clay and 3% calcium carbonate, by weight, the mixed rare earths are manufactured into rare earths with a granulator Balls, the rare earth balls are naturally air-dried.

[0030] Preheat the mold and rare earth balls. The preheating temperature is 600°C, which is close to the temperature to be infiltrated into the molten aluminum. The size of the mold used is 300mm×300mm. Use an air compressor to pressurize the molten aluminum at 0.5-10Mpa. Infiltrate into the gap of the rare earth ball within seconds, the ratio of the rare earth ball to the aluminum liquid is 2.5:1, the aluminum liquid is made of 97% industrial pure aluminum, after cooling, take out the casting, and clean the rare earth ball with an aqueous solution at 45°C to 65°C. A dispersant is added, and the dispersant is 0.1% sodium polyphosphate, and all the rare earth balls are washed out from the...

Embodiment 3

[0032] Mixed rare earths are used as fillers, the mixed rare earths include 92% kaolin, 3% white carbon black, 4% expansive clay and 1% calcium carbonate, by weight, the mixed rare earths are manufactured into rare earths with a pellet granulator balls, and dry the rare earth balls at low temperature.

[0033] Preheat the mold and rare earth balls. The preheating temperature is 650°C, which is close to the temperature to be infiltrated into the molten aluminum. The size of the mold used is 400mm×400mm. Use an air compressor to pressurize the molten aluminum at 0.5-10Mpa. Infiltrate into the gap of the rare earth ball within seconds, the ratio of the rare earth ball to the aluminum liquid is 2.5:1, the aluminum liquid is made of 97% industrial pure aluminum, after cooling, take out the casting, and clean the rare earth ball with an aqueous solution at 45°C to 65°C. A dispersant is added, and the dispersant is 0.1% sodium polyphosphate, and all the rare earth balls are washed ou...

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Abstract

The present invention discloses one kind of foamed aluminum material. The foamed aluminum material is prepared through a particle permeating process, and the preparation process includes the following steps: preparing mixed RE pellet with kaolin, white carbon black, expanded clay and calcium carbonate in certain weight proportion and through mixing, pelletizing and drying; pre-heating the mold and the mixed RE pellet to 550 deg.c-650 deg.c, near the temperature for aluminum liquid to permeate; permeating aluminum liquid at 8-45 MPa into the gaps of mixed RE pellet; cooling and washing the taken casting with water solution at 45-65 deg.c to obtain foamed aluminum material. The foamed aluminum material with separated and continuous foams has excellent sound absorbing effect.

Description

technical field [0001] The invention relates to a foamed aluminum material, in particular to a continuous and independent foamed aluminum material. Background technique [0002] Metal foam is a new type of functional material, and its invention has only a history of more than 40 years. Until today, the United States, Japan, Germany, the United Kingdom, Canada and other countries have successively developed a variety of methods for producing foamed aluminum. But so far, according to the foaming form of aluminum foam in various countries, aluminum foam materials are generally divided into two types of bubbles, one is the independent existence of bubbles, which is called independent bubble type, also called closed cell type. The other is that the bubbles are in a continuous state, which is called continuous bubble type, also called open cell type. [0003] Independent foamed aluminum materials are produced using hydride as a foaming agent. Its problems are: the independent b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/08B22D23/04
Inventor 贾修实
Owner 贾修实
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