Hard alloys WC-Zr<sub>1-<i>х</i></sub>W<sub><i>х</i></sub>C<sub>1-<i>у</i></sub>N<sub><i>у</i></sub>- Co
Are received hard alloys with high physicomechanical and operational properties on the basis of system WC-Co with additives complex carbonitrides Zr<sub>1-<i>х</i></sub><i></i>W<sub><i>х</i></sub><i></i>C<sub>1-y</sub>N<sub><i>у</i></sub><i></i>, preliminary synthesized of zirconium carbide, nitride and of tungsten carbide. Parameters of wetting and temperatures of occurrence of liquid phase in system complex carbonitrides-Co are determined. Samples of hard alloys sintered at 1400-1500ºС in vacuum and determined physicomechanical properties. The maximal transverse rupture strength (2100 МПа) the alloy of 75%WC + Zr<sub>0.5</sub>W<sub>0.5</sub>C<sub>0.8</sub>N<sub>0.2</sub> + Co has at temperature of sintering 1430ºС that is much higher than parameters for standard hard alloys of marks ВК (1800 МПа) and ТК (1500 МПа). Trial tests have shown, that at cutting steels and alloys the tool from the developed alloys achieves increase in resistance 1.8-2.1 times in comparison with standard hard alloy Т14К8.