抄録
The carbide powders (WC, VC, Cr3C2) having usual particle size of 1-2.5μm were finely ballmilled under a prescribed condition. Using these fine carbide powders (<0.2μm), WC-VC-Cr3C2-13mass%Co submicron cemented carbides (VC≤10mass% and Cr3C2≤8mass% in binder, respectively) were vacuum-sintered at 1320-1350°C and finally HIP-ed. Microstructures, hardness and transverserupture strength of the alloys were mainly examined.
It has been found that the properties of submicron alloys obtained in the present study are by no means inferior to those of commercially available alloys. It was noted that the ball-milled carbide powders showed a narrow particle distribution, nearly the same as that of commercial powders for preparing submicron alloys.
