The invention discloses a preparation method of an aluminum-based
composite material reinforced by particles through uniform dispersion. The preparation method includes the following specific steps that a
metal Al-Si
alloy is added in a
graphite crucible, and the
alloy is made to be in the
molten state by conducting electromagnetic inducting heating through
electromagnetic field generation devices; and the reinforcing particles accounting for 4.5%-5.5% of the volume of the
molten alloy are taken, preheated to 300 DEG C and slowly added in the
molten alloy, the reinforcing particles and the
molten alloy are mixed under cooperative stirring of a mechanical stirrer and the
electromagnetic field generation devices, the temperature of the
alloy is kept within the eutectic area of the Al-Si alloy by controlling the intensity of electromagnetic fields, part of Si
crystal particles are separated out, Si crystals which are separated out are sufficiently mixed with the reinforcing particles under the synergistic effect of mechanical and
electromagnetic stirring, reinforcing particle clusters are broken, and therefore the reinforcing particles can be evenly dispersed in an
alloy substrate. Bymeans of the preparation method, the problem that because mechanical stirring is independently used, dead zones in a melt are caused is solved, and meanwhile the phenomenon that because
electromagnetic stirring is independently used, the reinforcing particles are gathered on the surface of the
alloy substrate is also avoided.