Method for preparing micro-nano particle hybrid reinforced aluminum matrix composite

The invention belongs to the technical field of aluminum-based composite materials, and particularly relates to a method for preparing a micro-nano particle hybrid reinforced aluminum-based composite material. The preparation method comprises the following steps: carrying out surface treatment on micron SiC particles, proportioning Al and calcined kaolin powder, carrying out ball-milling pre-dispersion, sequentially introducing in-situ nano particles and additional micron particles into an aluminum alloy, stirring an Al-Si alloy melt at a semi-solid temperature, adding mixed powder, carrying out turbulent stirring dispersion by using a planetary double-stirring-paddle stirring device, heating, and carrying out heat preservation, so as to obtain the aluminum alloy. Reacting to generate in-situ nano Al2O3 particles; the preparation method comprises the following steps: firstly cooling to supplement alloy elements, then cooling to a semi-solid temperature, repeating turbulence stirring operation ...