Magnesium alloy and aluminum alloy connecting method and device

Abstract

The invention provides a magnesium alloy and aluminum alloy connecting method. A matched device is designed aiming at the magnesium alloy and aluminum alloy connecting method. A layer of micron-levelamorphous thin film is sputtered on a to-be-connected part of each sample through the magnetron sputtering technology as a connecting medium; not only is oxidation of the connecting parts avoided, butalso generation of a magnesium-aluminum intermetallic compound is avoided; meanwhile, the defects of pores, macrocracks and the like do not exist between the connecting area of a magnesium alloy andan aluminum alloy and the magnesium alloy as well as between the connecting area of the magnesium alloy and the aluminum alloy and the aluminum alloy; the residual stress in transition layers can be reduced by a large margin through the amorphous thin films serving as intermediate layers; and the transition areas of the amorphous thin films are small, so that the influence on the overall performance of the magnesium alloy and the aluminum alloy is less, the bonding strength of a magnesium-aluminum connector is improved significantly, and magnesium-aluminum connection is firmer.

Description

technical field [0001] The invention belongs to the field of connecting magnesium alloys and aluminum alloys, and in particular relates to a method and a device for connecting magnesium alloys and aluminum alloys. Background technique [0002] As an engineering structural material, aluminum alloy has low density, high strength and good plasticity, and can be processed into various profiles. Because of its excellent electrical conductivity, thermal conductivity and corrosion resistance, it is widely used in automobiles, ships, trains, On vehicles such as space shuttles. With the decline in the price of magnesium alloys, magnesium alloys are increasingly used in automobiles and other industries due to their good processability, shock resistance, and light weight. When the application fields of magnesium alloy and aluminum alloy intersect, it is inevitable to encounter connection problems. Solve the connection problem of magnesium alloy and aluminum alloy, give full play to t...

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Problems solved by technology

However, the inventors found that the method adopted a larger extrusion ratio, resulting in larger deformation of the magnesium-aluminum alloy joint, and the interface is not beautiful; in addition, the thickness of the amorphous alloy sheet is large, and a large intermediate transition will be formed after extrusion layer; and due to the high strength of the amorphous alloy, a large extrusion force is required to realize the connection between the magnesium alloy, the amorphous alloy sheet, and the aluminum alloy, which is easy to cause amorphous crystallization, and after amorphous crystallization Hardness increases, plasticity decreases, and reduces the connection strength of magnesium-aluminum alloys, which is not conducive to the connection of aluminum-magnesium alloys; in addition, the surface of the sample is not coated in this patent application, which is easy to oxidize, and the heating rod and heating mold are used to The sample is heated, the speed is slow (1-2h), and the efficiency is low; for this reason, the inventor has proposed a new method of combining the magnetron sputtering coating technology to connect the magnesium alloy and the aluminum alloy by heating and pressing. method, to overcome the deficiencies in this patent application

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