Production preparing method of composite foam aluminum

Abstract

The invention discloses a production preparing method of composite foam aluminum. The method specifically comprises the following steps of S1, making a preliminary foaming sphere, and after drying, carrying out standby application; S2, making a final foaming sphere, and after drying, carrying out standby application; S3, forming oxidized grapheme slurry, and carrying out standby application; S4, forming an aluminum alloy melt; S5, stirring to form a pre-treated aluminum alloy melt; S6, carrying out penetrating casting, and forming a foam aluminum plate blank; S7, removing a mold, carrying outultrasonic immersing for a period of time, and after washing, performing drying under the inert gas protection; S8, attaching the other foam aluminum plate blank to a foam aluminum plate blank sprayedwith graphene oxide slurry, and forming a composite type foam aluminum plate blank; and S9, putting the composite foam aluminum plate blank into a heating furnace, carrying out heating, and rolling to become a final composite foam aluminum plate. The composite foam aluminum prepared through the method has the good mechanical property, the structural strength can be improved, density is small, andheat insulation performance is good.

Description

technical field [0001] The invention relates to the technical field of foamed aluminum production, in particular to a production and preparation method of composite foamed aluminum. Background technique [0002] Aluminum foam material is a new type of functional material, which has been invented for more than 40 years. Up to now, a variety of methods for producing foamed aluminum have been developed at home and abroad, but basically can be divided into two types, one is that the bubbles exist independently, called the independent bubble type, also known as the closed cell type; The bubbles are in a continuous state, which is called continuous bubble type, also known as open cell type. [0003] Aluminum foam, as a buffer energy-absorbing material with great application prospects, has the disadvantage of poor mechanical properties. The mechanical properties of aluminum foam are mainly determined by its density, but the size, structure and distribution of pores are also import...

AI Technical Summary

Problems solved by technology

During the foaming process, since the melting point of aluminum exceeds the maximum decomposition peak temperature of titanium hydride, titanium hydride will decompose uncontrollably and rapidly in a very short period of time just after it is added to the aluminum melt, resulting in insufficient time for titanium hydride to disperse evenly in the aluminum melt , nor can it maintain good foaming ability after stirring evenly, and the finally prepared aluminum foam has uneven pore distribution and irregular pore structure

[0005] When the foaming agent calcium carbonate with a higher decomposition temperature is used for the production of foamed aluminum, its decomposition temperature is 825 ° C, which is much higher than that of the aluminum melt. At the decomposition temperature of calcium carbonate, the viscosity of the aluminum melt is very low, and it is difficult to retain the melt. At the same time, the compatibility between calcium carbonate and aluminum is poor, the prepared foamed aluminum cell wall has poor plasticity and toughness, and the mechanical properties of foamed aluminum are low