| abstract |
The invention relates to a method for preparing a high-strength and high-plasticity aluminum-based composite material, using high-purity Al, industrial pure Mg, industrial pure Zn, Al-50Cu, Al-12Zr master alloy, KBF 4 and K 2 TiF 6 as raw materials, using The in-situ TiB 2 micro-nanoparticle reinforced Al-Zn-Mg-Cu alloy composite was prepared by the method of in-situ melt self-generation control. The extrusion deformation direction of each pass was perpendicular to the previous extrusion direction. The extrusion deformation in the overlapping sheet extrusion die equipment can apply a large amount of cumulative shear strain to the particle reinforced aluminum matrix composite material, and then play the role of mechanical stirring to break up the in situ self - generated TiB2 particle aggregates in the composite material , so that the micro - nano TiB2 particles are uniformly dispersed in the aluminum matrix, and the grain structure of the Al-Zn-Mg-Cu matrix of the composite material can be refined to obtain uniform and fine equiaxed grains. The aluminum-based composite material prepared by the method of the invention can simultaneously have high strength and high plasticity. |