A kind of preparation method of large size lightweight magnesium-aluminum base amorphous alloy

Abstract

The invention belongs to the field of amorphous alloys, and more specifically relates to a preparation method of a large-sized light-weight magnesium-aluminum-based amorphous alloy. Weigh the powdered magnesium-based amorphous alloy and aluminum-based amorphous alloy according to the target alloy composition ratio, and mix them uniformly to obtain magnesium-aluminum-based amorphous alloy mixed powder; The liquid phase interval overlaps; the magnesium-aluminum-based amorphous alloy is prepared by powder sintering process or laser additive manufacturing technology. The invention uses aluminum-based amorphous as a toughening phase to improve the room temperature plasticity of magnesium-based amorphous alloys or uses magnesium-based amorphous as a reinforcing phase to improve the strength of aluminum-based amorphous, and adopts powder sintering technology or laser additive manufacturing technology to prepare large Lightweight and high-strength magnesium-aluminum-based amorphous alloys in size, thereby solving the problem that the existing technology uses a large difference in the internal structure of the crystal second phase and the amorphous matrix, the deformation mode is quite different, and the interface metallurgical bonding is difficult to achieve, resulting in the preparation of composite materials. Technical issues with poor material performance.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and more specifically relates to a preparation method of a large-sized light-weight magnesium-aluminum-based amorphous alloy. Background technique [0002] New lightweight and high-strength materials are widely used in aerospace, automotive lightweight, national defense equipment, large sea-crossing bridges, high-rise buildings and other fields. Titanium, magnesium, and aluminum are commonly used lightweight structural materials because of their abundant reserves, low density, and good strength properties. The strength of magnesium-based and aluminum-based amorphous alloys is 3 to 5 times that of traditional magnesium alloys and aluminum alloys. At the same time, it has good corrosion resistance, wear resistance, and high-temperature thermoplastic formability. It is a very promising New lightweight high-strength structural material. However, the preparation of amorphous alloys requires a fast co...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for preparing a large-sized lightweight magnesium-aluminum-based amorphous alloy, which uses aluminum-based amorphous as a toughening phase to improve the room temperature plasticity of the magnesium-based amorphous alloy Or use magnesium-based amorphous as a reinforcing phase to improve the strength of aluminum-based amorphous, and use powder sintering technology or laser additive manufacturing technology to prepare large-size, lightweight, high-strength magnesium-aluminum-based amorphous alloys, thereby solving the problem of using crystals in the prior art. There is a large difference in the internal structure of the two-phase and the amorphous matrix, and the deformation mode is quite different. It is difficult to realize the interface metallurgical bonding, which leads to the technical problem that the performance of the prepared composite material is not high.

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