Preparation method of nano silicon carbide particle reinforced aluminum alloy-based composite material

The invention relates to the field of preparation of metal-based composite materials, and particularly discloses a preparation method of a nano silicon carbide particle reinforced aluminum alloy-based composite material. The method comprises the following steps of clamping nano silicon carbide particles, alloy element powder or sheets among a plurality of aluminum plates, performing rolling at room temperature, performing folding in the rolling direction after rolling, and repeating the rolling-folding process for multiple passes; and heating and rolling a rolled sample repeatedly to obtain the finally completely-densified block aluminum alloy-based composite material. In the multi-pass rolling process, under the action of severe plastic deformation, alloy elements are gradually dissolved and enter an aluminum matrix, the solid alloying effect is achieved, and an aluminum alloy matrix is formed; and meanwhile, the silicon carbide particles are also uniformly dispersed in the aluminum alloy matrix. Equipment r