Method for preparing foamed aluminum by foaming melt

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...

AI Technical Summary

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 and cavities with complex shapes. When it is used for regular shaped bodies, regular sandwich structures or regular foamed aluminum alloy fillers, it is not necessary to use secondary The preparation method of foaming, in today's diversified process and product diversification, the above-mentioned secondary foaming preparation method complicates the supposedly simple process, relatively increases the production cost, and cannot meet the diversified requirements of production

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