The microstructure and properties of squeezing casting ZL111 aluminum matrix composites with 20% silicon carbide particles by horizontal squeezing casting machine were investigated. The results show that the composites can be prepared by horizontal squeezing casting with specific pressure of 135 MPa and extrusion punches speed of 0.4 m/s as well as pouring temperature of 710 ℃. The silicon carbide particles are uniformly distributed in the microstructure

and absence of aggregation of the SiCp can be observed

so the SiCp content is uniform in the composites samples. In addition

the SiC particles are distributed only in the eutectic structure in the composites samples. Wear resistance of the composite samples is significantly improved

leading to a sharp wear of cutting tool. Meanwhile

the Brinell hardness is in range of 76.7HB～94.4HB

which is basically near to that of ZL111 alloy.