Abstract
The ultrafine WC-14wt%TiC-8wt%Co powders doped different vanadium carbide(VC) content with an average particle size of 270nm were prepared by 72 hours high-energy ball milling. The VC content ranged from 0wt% to 1wt%. The powder was cold isostatic pressed at 280MPa and vacuum sintered at 1380°C. The physical properties and the micrographs of samples were detected. The main conclusions were as follow: the coercivity and hardness increased and the density and Cobalt magnetic decreased with the content of VC increasing; the hardness of alloy with 0.8wt% VC reached 91.8HRA.When the content of VC was less than 0.6wt%, the transverse rupture strength (TRS) increased; the content surpassed 0.8wt%, the TRS was lower than the one without VC. The VC could inhibited the growth of WC grain and the average grain size of WC with 0.8wt% VC was 0.7μm.
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