Coating hot-pressing reinforcement method of magnesium-aluminum alloy plate

Abstract

The invention relates to a coating hot-pressing reinforcement method of a magnesium-aluminum alloy plate. According to the coating hot-pressing reinforcement method, aiming at the situations of soft texture, low hardness and strength and poor corrosion resistance of the magnesium-aluminum alloy plate, a layer of magnesium-aluminum-erbium alloy coating is formed on the magnesium-aluminum alloy plate through hot-pressing sintering by taking rare earth erbium as a reinforcing agent and using the steps of casting of magnesium-aluminum-erbium alloy, powder forming through ball milling, hot-pressing sintering and low-temperature tempering, wherein firm bonding between the coating and the alloy plate is achieved, therefore strength, hardness and corrosion resistance of the magnesium-aluminum alloy plate are greatly increased, coating hardness reaches 270HV which is increased by 3.55 times, and corrosion resistance of the magnesium-aluminum alloy plate with the magnesium-aluminum-erbium alloy coating is increased by 519 percent compared with that of the magnesium-aluminum alloy plate without the magnesium-aluminum-erbium alloy coating. The preparation method disclosed by the invention has the advantages of advanced process, detailed and accurate magnitude, good coating bonding force, compact metallographical tissues and capability of being applied in multiple industrial fields and is the very ideal coating hot-pressing sintering reinforcement of the magnesium-aluminum alloy plate.

Description

technical field [0001] The invention relates to a coating hot-pressing strengthening method of a magnesium-aluminum alloy plate, which belongs to the technical field of non-ferrous metal strengthening mechanical properties and process preparation. Background technique [0002] Magnesium-aluminum alloy is a non-ferrous metal alloy with low density, high specific strength and specific stiffness, good electromagnetic shielding, and easy processing. It is widely used in the automotive industry, electronic products, and aerospace fields; but the magnesium-aluminum alloy High chemical activity, poor corrosion resistance, easy oxidation in the air to form a loose porous oxide film, and soft texture, low hardness, low strength, poor surface corrosion resistance, these disadvantages limit the application of magnesium aluminum alloy, in order to make magnesium aluminum alloy In order for the alloy to be more widely used, the surface of the magnesium-aluminum alloy must be enhanced. ...

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Problems solved by technology

[0002] Magnesium-aluminum alloy is a non-ferrous metal alloy with low density, high specific strength and specific stiffness, good electromagnetic shielding, and easy processing. It is widely used in the automotive industry, electronic products, and aerospace fields; but the magnesium-aluminum alloy High chemical activity, poor corrosion resistance, easy oxidation in the air to form a loose porous oxide film, and soft texture, low hardness, low strength, poor surface corrosion resistance, these disadvantages limit the application of magnesium aluminum alloy, in order to make magnesium aluminum alloy Alloys are more widely used, and the surface of magnesium-aluminum alloys must be enhanced

[0003] At present, there are many forms of surface treatment methods for magnesium and aluminum alloys, such as electrochemical treatment, chemical oxidation treatment, organic coating, metal coating, although these surface modification methods have certain effects on magnesium and aluminum alloys, but There are also technical deficiencies, some complex processes, large equipment investment, high cost, some coatings have poor bonding with the substrate, and are easy to fall off, and some coatings have insufficient properties and cannot reach the requirements of reinforcement, hardening, and corrosion resistance. purpose, which limits large-scale industrial applications

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