Preparation method and device of metal foam material

Abstract

The invention discloses a preparation method and a device of a metal foam material. The preparation method comprises the following steps: mixing 93-99 wt% of aluminium matrix, 0.5-5 wt% of additive and 0.5-2 wt% of foaming agent uniformly to form a shaped foamable precursor material, putting the foamable precursor material in a foaming furnace with infrared heating to foam the foamable precursor material fast under infrared radiation, then taking the foam material out from the foaming furnace and cooling, wherein, the aluminium matrix is pure aluminium, aluminium powder or aluminium alloy, the foaming agent is titanium hydride, zirconium hydride, or calcium carbonate, and the additive is calcium, carborundum powder, or alumina powder. The device is a foaming furnace with infrared heating,has the advantages of fast foaming the precursor material, eliminating the hole gradient, easily controlling the foaming and cooling process, making the product have reproducibility and maneuverability, and improving cellular uniformity. According to the invention, metal foam sandwich panels can be prepared directly, and the mechanical properties of the aluminium-based foam material are improved.

Description

technical field

[0001] The invention relates to a method for preparing a metal foam material, in particular to a method and a device for preparing a closed-cell metal foam material. Background technique

[0002] Closed-cell metal foam is a new multifunctional structural material, which has the characteristics of low relative density, large specific surface area, high specific mechanical properties, and good damping and shock absorption performance. It can be widely used in aerospace, military industry, ships, and rail trains. , automobiles and construction, machinery and many other fields;

[0003] The preparation methods of closed-cell metal foam mainly include melt stirring casting method and powder metallurgy method.

[0004] The melt stirring casting method first melts aluminum at a certain temperature, and adds additives that can increase the viscosity of the melt to the aluminum melt, and then adds a foaming agent to the aluminum melt and disperses it evenly by stirri...

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