Preparation method of magnesium-aluminum layered composite plate

Abstract

The invention relates to a preparation method of a magnesium-aluminum layered composite plate, aiming at solving the problems that the magnesium-aluminum alloy plate is light in weight, low in strength and poor in corrosion resistance. The method comprises the steps of: pressing and labeling a layer of aluminum plate on the magnesium-aluminum alloy plate; taking magnesium-aluminum eutectic alloy powder as a pressing and labeling material; pressing and labeling the magnesium-aluminum alloy plate+the magnesium-aluminum eutectic alloy powder+the aluminum plate into a magnesium-aluminum layered composite plate in an open-close through groove mould on a press machine under the temperature of 480 DEG C and the pressure of 30M Pa for 60s; and performing the low-temperature thermal treatment, so that an internal metallographic phase tissue of the magnesium-aluminum layered composite plate is more compact and stable. The method is advanced and reasonable, small in use equipment, short in technological process, and fast in speed. The mechanical property tensile strength of the magnesium-aluminum layered composite plate can reach 24MPa. Compared with the prior art, the mechanical property tensile strength can be improved by 95%, and the corrosion resistant performance can be improved by 94%, therefore, the preparation method of the magnesium-aluminum layered composite plate is very ideal.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-aluminum layered composite plate, which belongs to the technical field of surface pressure bonding and performance enhancement of non-ferrous metal plates. Background technique [0002] Magnesium is the lightest non-ferrous metal with low density, high specific strength, and excellent electromagnetic shielding properties. It has been widely used in aviation, aerospace, electronics, and automobile industries. [0003] The application of magnesium is limited due to its light weight, low strength, low melting point, negative potential, loose and porous oxide film, and poor corrosion resistance. [0004] In order to enhance the mechanical properties and application range of magnesium, magnesium is often mixed with other non-ferrous metals to make magnesium alloys, such as magnesium aluminum alloy, magnesium zinc alloy, etc.; in order to enhance the chemical physical properties and mechanical prop...

AI Technical Summary

Problems solved by technology

[0003] The application of magnesium is limited due to its light weight, low strength, low melting point, negative potential, loose and porous oxide film, and poor corrosion resistance.

[0004] In order to enhance the mechanical properties and application range of magnesium, magnesium is often mixed with other non-ferrous metals to make magnesium alloys, such as magnesium aluminum alloy, magnesium zinc alloy, etc.; in order to enhance the chemical physical properties and mechanical properties of magnesium and magnesium alloys, magnesium is often mixed and magnesium alloys, such as: chemical treatment, coating the surface of magnesium or magnesium alloys to form a passivation film of oxide or metal structure to enhance the corrosion resistance of magnesium. Most of the treatment agents in this method contain chromium or Non-ferrous heavy metals are harmful to the environment and the human body; for example: anodic oxidation method, which can greatly improve the corrosion resistance compared with chemical treatment methods, but this method is less effective than the backward process; for example: metal plating method, which uses fluoride as the active After nickel plating and passivation treatment, the mechanical properties, corrosion resistance and weldability of the surface can be enhanced, but this treatment process is more expensive; at present, the field of science and technology has been looking for a simple process, excellent effect, environmental protection and energy saving method to greatly improve the performance of magnesium and magnesium alloys

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