Preparation method of foamed aluminum material with calcium oxide as seepage particles

Abstract

The invention provides a method for preparing foamed aluminum material with calcium oxide as seepage particles. The steps are: 1) obtaining calcium oxide particles in the required mesh range through grinding and screening; 2) mixing pure ethanol liquid with 300 mesh or more After the calcium oxide fine powder is evenly mixed, it is stirred and mixed evenly with the calcium oxide particles calculated according to the set porosity after sieving; 3) the calcium oxide particles obtained in step 2) are put into a metal mold and pressed into a compact 4) Preheat the metal mold and the prefabricated block at 600-750°C until the internal and external temperatures are uniform; 5) Extrude the molten aluminum to fill the pores of the preheated prefabricated block, and wait for the molten aluminum to After solidification, a composite of calcium oxide particles and aluminum is formed; 6) soak the composite in saturated ammonium chloride aqueous solution to remove calcium oxide particles and soluble calcium chloride, and then obtain a foamed aluminum material with a certain porosity . The porosity of the foamed aluminum material of the invention can be controlled artificially, which further improves its pore structure and performance.

Description

technical field [0001] The invention provides a method for preparing a foamed aluminum material with calcium oxide as seepage particles, belonging to the technical field of metal materials. Background technique [0002] Aiming at the current domestic process of preparing foamed aluminum materials by percolation method, salt or improved granular materials of different materials are generally used as percolation particles to prepare foamed aluminum materials. Patent No. 201510046609.7 discloses a calcium oxide It is a foamed aluminum manufacturing method for percolation particles. This method not only avoids the disadvantages of unstable particle size and corrosion of foamed aluminum materials due to the crystal water contained in salt when using salt as percolation particles, but also overcomes the disadvantages of other materials. The cost of granular materials is high, and the particles are not easy to remove. [0003] For the new method of preparing foamed aluminum materi...

AI Technical Summary

Problems solved by technology

[0002] In view of the current domestic process of preparing foamed aluminum materials by infiltration method, common salt or improved granular materials of different materials are used as infiltration particles to prepare foamed aluminum materials. Patent No. 201510046609.7 discloses a calcium oxide It is an aluminum foam manufacturing method for seepage particles. This method not only avoids the disadvantages of unstable particle size and corrosion to foam aluminum materials when salt is used as seepage particles due to the crystal water contained in salt, but also overcomes the disadvantages of other materials. The cost of granular materials is high, and the particles are not easy to remove, etc.

[0003] For the new method of preparing foamed aluminum materials with calcium oxide as seepage particles, there is a shortcoming that the porosity range of the particles is limited to 70-73% after compaction, which is not easy to adjust, which makes the performance of the foamed aluminum materials single. Limits the range of application of foamed aluminum materials