Method for preparing foamed aluminum by foaming melt

A technology of melt foaming and aluminum foam, which is applied in the field of preparation of aluminum foam, can solve problems such as high requirements for equipment and environmental parameters, failure to meet diversified requirements, and increased production costs, so as to reduce production costs and reduce production costs. Equipment requirements, effect of uniform pore structure

Inactive Publication Date: 2011-04-06
DONGGUAN UNIV OF TECH +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patents 200610088246.4 and 200710133993.X respectively disclose a method for preparing foamed aluminum or aluminum alloy by foaming method. Both of these two preparation methods are secondary foaming of aluminum or aluminum alloy, and the process is relatively complicated, which is harmful to equipment and environment. The parameter requirements are relatively high, and it is more suitable for the preparation or filling of foamed aluminum alloy shaped parts a

Method used

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  • Method for preparing foamed aluminum by foaming melt
  • Method for preparing foamed aluminum by foaming melt
  • Method for preparing foamed aluminum by foaming melt

Examples

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Embodiment 1

[0032] Embodiment one: Such as figure 1 Shown, a kind of method for preparing foamed aluminum by one-shot melt foaming, described method step comprises.

[0033] (1) Cut the aluminum into ingots, put the aluminum ingot into the crucible, start the thermoelectric furnace to heat to 800°C, and keep it warm for 1 to 30 minutes to completely melt the aluminum.

[0034] (2) Add metallic calcium to the molten aluminum when the temperature of the molten aluminum drops to 680°C by adjusting the thermoelectric furnace. The amount of calcium added is between 1% and 4% of the relative weight of aluminum; while adding calcium, use a mixer to stir and stir The optimal time is 1 to 35 minutes, so that the calcium is evenly distributed in the molten aluminum and fully mixed with the molten aluminum so that the surface viscosity of the melt increases.

[0035] (3) Pretreat titanium hydride, and add the pretreated titanium hydride to the melt when the melt temperature drops to 650°C by adj...

Embodiment 2

[0038] Embodiment two: Such as figure 1 Shown, a kind of method for preparing foamed aluminum by one-shot melt foaming, described method step comprises.

[0039] (1) Cut the aluminum into ingots, and the length of the ingots is best controlled at 5-10mm; put the aluminum ingots into the crucible, start the thermoelectric furnace and heat it to 800°C, so that the aluminum is completely melted into aluminum liquid.

[0040] (2) Add metallic calcium to the molten aluminum when the temperature of the molten aluminum drops to 680°C by adjusting the thermoelectric furnace. The amount of calcium added is between 1% and 4% of the relative weight of aluminum; while adding calcium, use a mixer to stir and stir The best time is 1-35 minutes, and the best stirring speed is 4500rpm, so that the calcium can be evenly distributed in the molten aluminum and fully mixed with the molten aluminum to increase the surface viscosity of the melt.

[0041] (3) Pretreatment of titanium hydride by ...

Embodiment 3

[0045] Embodiment three: Such as figure 1 Shown, a kind of method for preparing foamed aluminum by one-shot melt foaming, described method step comprises.

[0046] (1) Cut the aluminum into ingots, and the length of the ingots is best controlled at 5-10mm; put the aluminum ingots into the crucible, start the thermoelectric furnace and heat it to 800°C, so that the aluminum is completely melted and turned into aluminum liquid.

[0047] (2) Add metallic calcium to the molten aluminum when the temperature of the molten aluminum drops to 680°C by adjusting the thermoelectric furnace. The amount of calcium added is between 1% and 4% of the relative weight of aluminum; while adding calcium, use a mixer to stir and stir The best time is 1-35 minutes, and the best stirring speed is 4500rpm, so that the calcium can be evenly distributed in the molten aluminum and fully mixed with the molten aluminum to increase the surface viscosity of the melt.

[0048] (3) Coating titanium hydrid...

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Abstract

The invention relates to a preparation method of foamed aluminum, in particular to a method for preparing the foamed aluminum by primarily foaming a melt, which can prepare a foamed aluminum product by primarily foaming aluminum. The method comprises the following steps of: starting a thermoelectric furnace for heating to 800 DEG C until the aluminum is fully molten; lowering the temperature to 680 DEG C, adding metal calcium into aluminum liquid and stirring so as to increase the surface viscosity of the melt; pretreating titanium hydride, adding pretreated titanium hydride into the melt and stirring to uniformly distribute the titanium hydride in the melt for full decomposing; and heating a mold, putting the melt into the thermally-treated mold, preserving heat and foaming at the temperature of 650 DEG C, taking a prefabricated member out, performing air cooling to shape the high-temperature foam melt in the mold and taking the prefabricated member out for water cooling so as to obtain the foamed aluminum product. When applied to a filling piece of a regular cavity, the method simplifies a process, greatly lowers production cost, is suitable for diversified development of industrial production and brings convenience to the research of specific technology.

Description

technical field [0001] The invention relates to a method for preparing foamed aluminum, in particular to a method for preparing foamed aluminum by foaming the aluminum by one-time melt foaming to obtain foamed aluminum products. Background technique [0002] Foamed aluminum is a new type of composite metal material with a large number of pore structures. The general porosity is 40% to 98%. It has light weight, high specific strength, damping and shock absorption, high impact energy absorption and excellent sound absorption, heat insulation, Various physical properties such as heat dissipation and electromagnetic shielding have been applied in aviation, aerospace, automobile manufacturing, rail transit and other fields. In many practical applications at present, foamed aluminum alloy products are more widely used than simple foamed aluminum materials. Therefore, foamed aluminum and foamed aluminum alloy have become one of the hot materials that many countries are competing to...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C21/00
Inventor 何伟锋陈勇志李荣泳孙振忠
Owner DONGGUAN UNIV OF TECH
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