Preparation method of magnesium base composite doped with SiC grains

Abstract

The invention relates to a preparation method of a magnesium base composite doped with SiC grains. Due to the fact that the mechanical property of a magnesium alloy is poor, the ceramic SiC grains are doped in a smelting process of the magnesium alloy to prepare a reinforced magnesium alloy block material through smelting, doping, gas shielding, casting, and extruding; the strength and the hardness of a magnesium alloy ingot are improved largely; the Vickers hardness of the composite reaches 70.1, and is increased by 30% compared with a common magnesium alloy; the tensile strength reaches 183 MPa, and is increased by 103.3% compared with the common magnesium alloy; the preparation method is advanced in process, detailed and accurate in data, and is an ideal method of preparing the reinforced magnesium base composite.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material doped with SiC particles, and belongs to the technical field of nonferrous metal material preparation and reinforcement methods. Background technique [0002] Non-ferrous metal magnesium-based composite materials have the advantages of light weight, easy processing, and good gloss. They are often used in machinery, electronics, aviation, spaceflight, and civil decorative products. However, magnesium-based composite materials have low strength, low hardness, and corrosion resistance. The performance is poor, and the application in the industrial field has been greatly limited. [0003] There are also many ways to strengthen magnesium-based composite materials, such as hot pressing, which is pressed in a heated state to increase the density of the metallographic structure to achieve the purpose of strengthening; such as cold rolling, which is to stack magnesium alloy pl...

AI Technical Summary

Problems solved by technology

[0002] Non-ferrous metal magnesium-based composite materials have the advantages of light weight, easy processing, and good gloss. They are often used in machinery, electronics, aviation, spaceflight, and civil decorative products. However, magnesium-based composite materials have low strength, low hardness, and corrosion resistance. The performance is poor, and the application in the industrial field has been greatly limited

[0003] There are also many ways to strengthen magnesium-based composite materials, such as hot pressing, which is pressed in a heated state to increase the density of the metallographic structure to achieve the purpose of strengthening; such as cold rolling, which is to stack magnesium alloy plates together. Carry out cold rolling and extrusion to achieve the purpose of strengthening; for example, the method of adding metal is to add metal alloy during the melting process of magnesium-based composite materials, but due to the difference in melting point, the degree of alloying is very weak; The reinforcement flux is added during the smelting process of the matrix composite material, but the fusion property is poor; for example, the method of adding non-metallic materials, due to the backward preparation process, the reinforcement effect is not good, and the reinforcement purpose cannot be achieved

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