Abstract: The fabrication of the high speed steel matrix composites reinforced by WC particles utilizing the ultrasonic gas atomization and spray-deposition was studied. The change of microstware and mechanical Properties of the composites added WC Particles were investigated and analyzed as well. As some results, the WC particles exhibit two morphologies (spherical and angular) with different content of WC particles; and with the increase of content of WC particles, the hardness of the composites increases, yet the bending strength appears a trend of decreasing.