Foam aluminum metallurgy connecting method

Abstract

The invention relates to a foam aluminum metallurgy connecting method. The method specifically comprises the following steps that firstly, an oxidization layer on a foam aluminum butt joint or lap joint face is removed through a mechanical or chemical method, and surface roughness is improved; secondly, to-be-connected foam aluminum is arranged in zinc-aluminum alloy melt to be subjected to immersion plating, and a uniform immersion plating layer is formed on the foam aluminum butt joint or lap joint face; thirdly, the foam aluminum butt joint or lap joint face obtained after immersion plating is attached and subjected to hot pressing, after hot pressing is finished, cooling is conducted to the room temperature, and metallurgy combining connection is formed. Compared with the prior art, the foam aluminum metallurgy connecting method has the beneficial effects that the technology is simple, and metallurgy connection is reliable. A foam aluminum connecting panel has mechanical strength higher than mechanical strength of a base material, and fatigue resistance, high temperature resistance and good weather resistance are achieved. The foam aluminum metallurgy connecting method is suitable for metallurgy connection of different specifications of foam aluminum plates, connection is reliable, performance is stable, and the foam aluminum metallurgy connecting method is suitable for engineering machining and large-scale production.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a foamed aluminum metallurgical connection method. Background technique [0002] The porous aluminum foam material has the characteristics of low density, light weight, high specific strength and high specific surface area, and also has many physical properties such as vibration reduction, damping, sound absorption, sound insulation, heat insulation, and electromagnetic shielding. However, due to its porous hollow structure, it cannot be connected by conventional welding processes, which limits the application range of aluminum foam. Therefore, how to solve the problem of aluminum foam connection or overlap is one of the problems that need to be faced in the engineering application of foam aluminum materials. [0003] At present, the connection methods of aluminum foam mainly include brazing method, diffusion welding, powder metallurgy and adhesive bonding method. ...

AI Technical Summary

Problems solved by technology

Due to the influence of the oxide film on the surface of the aluminum foam and the veneer aluminum plate, it is difficult for the solder to eliminate the oxide film on the surface of the two surfaces and infiltrate each other at the interface, resulting in insufficient bonding strength

Diffusion welding requires higher pressure to achieve interfacial atomic diffusion, but aluminum foam is easily deformed under higher strength

In addition, the brazing method and diffusion welding method have high cost and complicated operation

The powder metallurgy connection method is a direct connection method through high-temperature foaming by presetting prefabricated bodies between foamed aluminum connectors, but the foaming conditions of this technology are not easy to control, the technology is not mature enough, and the cost is high

The above methods are difficult to implement large-scale foamed aluminum connection, and are not suitable for large-scale connection of foamed aluminum and its plates

In addition, the adhesive bonding method relies on the adhesive layer to realize the connection between the aluminum foams. The process is simple, but the adhesive bonding method will cause connection failure due to the melting, deterioration or aging of the adhesive layer under conditions such as high temperature, corrosion or cyclic stress.