Al-Mg-Si alloy wire for added material manufacturing and preparation method thereof

Abstract

The invention relates to the technical field of metal material preparation, and in particular, discloses an Al-Mg-Si alloy wire for added material manufacturing and a preparation method thereof. The acute plastic deformation is performed on Al-Ti-B intermediate alloys generated with TiB2 particles in situ to obtain Al-Ti-B intermediate alloys containing nanometer TiB2 particles; the Al-Ti-B intermediate alloys containing the nanometer TiB2 particles are used as basal body raw materials, and other metal or intermediate alloys are fed for smelting to obtain alloy melts; the alloy melts are manufactured as wire blanks; and the hot rolling, the drawing, the intermediate annealing and the surface treatment are performed on the wire blanks to obtain nanometer and submicron-scale TiB2 particle reinforced Al-Mg-Si alloy wires. After the Al-Mg-Si alloy wire prepared through the method is molten, the alloy structure can be prominently refined, the solidification hot crack sensitivity is reduced,and meanwhile, the alloy casting strength can be prominently improved; and the Al-Mg-Si alloy wire can be used for added material manufacturing and welding of high-strength alloy structural parts.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to an Al-Mg-Si alloy wire for additive manufacturing and a preparation method thereof. Background technique [0002] Additive manufacturing, commonly known as 3D printing, laser additive manufacturing technology is a type of 3D printing, which uses lasers as heat sources to construct entities through layer-by-layer manufacturing; laser additive manufacturing technology uses laser solid forming (laser solidforming, LSF) and selective laser melting (selective laser melting, SLM) are relatively mature, and both of these two processes are manufactured with metal (non-metal, metal matrix composite) powder as raw material. [0003] Aluminum alloy has the advantages of good electrical and thermal conductivity, high strength-to-mass ratio, corrosion resistance and damage resistance, and is widely used in aerospace, rail transit, automobile and many other fields, but compa...

AI Technical Summary

Problems solved by technology

[0005] However, for high-strength aluminum alloys, there is still a problem of relatively high thermal crack tendency during the solidification process (additive manufacturing process), that is, obvious cracks will appear in high-strength aluminum alloys in laser-arc composite additive manufacturing, and there are still alloys after solidification The problem of low strength, which seriously affects the performance of high-strength aluminum alloy components

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