Method for preparing complex high strength aluminum alloy by adopting laser-induced electric arc additive manufacturing technology

Abstract

The invention relates to a method for preparing a complex high strength aluminum alloy by adopting a laser-induce electric arc additive manufacturing technology. The method comprises the following steps of (1) adopting an atomization pulverization process for powdering aluminum, magnesium, zinc, copper, zirconium and scandium respectively; (2) mixing the powder according to the proportion, rollinga high strength aluminum alloy into a tubular shape, and filling the powder into a tube core of the tubular high strength aluminum alloy so as to obtain an aluminum alloy flux core aluminum wire; (3)building a part three-dimensional model, and guiding into a laser-induce electric arc additive manufacturing and forming device; (4) guiding the aluminum alloy flux core aluminum wire into a weldinggun, melting the aluminum alloy flux core aluminum wire under a laser-induce electric arc, and forming the complex high strength aluminum alloy on a base plate according to a hierarchical path track through a robot; (5) separating a parts from the base plate, and putting the parts into a muffle furnace so as to be subjected to annealing, solution strengthening and aging treatment. The method provided by the invention can be used for forming the high strength aluminum alloy parts with complex structure and shape through additives, and has the advantages of quickness, accuracy in manufacturing,short manufacturing period, and low cost.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for preparing complex high-strength aluminum alloys using laser-induced arc additive manufacturing technology. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. Because of its outstanding characteristics such as high specific strength, high toughness, good corrosion resistance, and non-magnetic properties, it has a wide range of applications in aerospace, military chemical, medical and other fields. application. For example, in the selection of materials, whether it is military aircraft or civil aircraft, high-strength aluminum alloys occupy an important position. Among them, aluminum alloys account for 70% to 80% of the weight of structural materials in civil aircraft. With the development of the aerospace industry and the fact that aerospace materials are subjected to various envi...

AI Technical Summary

Problems solved by technology

Therefore, although the above-mentioned new high-strength aluminum alloys can be used for casting according to the ratio, there are still problems such as pores, cracks, and low dimensional accuracy when directly applied to additive forming.

In addition, due to the large difference in the physical properties of the elements in the alloy, elements with low melting points are prone to segregation due to evaporation under the action of a high-energy composite heat source, which affects the performance of parts

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