Manufacturing device and method for high-tenacity nano-particle-reinforced aluminum matrix composite material

Abstract

The invention relates to an aluminum matrix composite material, in particular to a manufacturing device and method for a high-tenacity nano-particle-reinforced aluminum matrix composite material. Themanufacturing device and method is characterized in that based on a designed spiral circulation stirring combination and compression integrated device, firstly an aluminum alloy matrix is placed in aspiral circulation stirring combination device and is heated to certain temperature and molten; an in-situ reactant; in-situ nano-combination is realized by virtue of the effect of spiral circulationstirring; then an in-situ combination melt is directly introduced into a spiral compression device, and is cooled to lower temperature in the spiral compression device; nano-particle cluster breakingand matrix crystal grain refining in the in-situ combined nano-particle-reinforced aluminum matrix combination material are realized by utilizing a large deformation shearing effect which is generatedby movement of a lead screw in the spiral compression device; and finally the material is formed through an extrusion end mould to obtain the high-tenacity nano-particle-reinforced aluminum matrix composite material of a required shape.

Description

technical field [0001] The invention relates to an aluminum-based composite material, in particular to a preparation device and method for a high-strength nano particle-reinforced aluminum-based composite material. Background technique [0002] The in-situ synthesis process of aluminum-based composites is a new technology developed in recent years. In-situ endogenous particle-reinforced aluminum-based composites have the advantages of small reinforcement size, good thermal stability, and high interface bonding strength. They are used in aviation, aerospace, It has a wide range of applications in industrial fields such as automobiles and machinery. Some studies in recent years have shown that when the particle size of the reinforcement is reduced to the nanometer level, the surface area of ​​the nanoparticles per unit volume increases sharply, and the composite strengthening effect is greatly improved, so that the nanoparticle-reinforced aluminum matrix composite has a higher...

AI Technical Summary

Problems solved by technology

However, there are still two major problems with the in-situ-generated nanoparticle-reinforced Al-matrix composites: (1) Due to the huge interfacial energy of the nanoparticles, the in-situ-generated nanoparticles tend to agglomerate, resulting in low strength and toughness of the composite; (2) Generally, the grains of cast aluminum matrix composites are coarse, and the strength improvement is limited

However, the existing technology is difficult to achieve large-scale continuous production. For example, the invention patent of the domestic publication No. CN103668013B "A method for superplastic pretreatment of in-situ aluminum-based composite materials", the in-situ nanoparticle-reinforced aluminum-based composite materials obtained in the as-cast state are processed. Friction stir processing (FSP) treatment makes the distribution of nanoparticles uniform, and obtains ultra-fine-grained aluminum-based composites, which can improve the strength and plasticity at the same time. However, the FSP process is complex and the processing area is extremely limited, making it difficult to realize industrial applications.

Images