Author(s)

Z. Kovziridze, N. Nizharadze, G. Tabatadze, E. Nikoleishvili, M. Mshvildadze

Department of Chemical and Biological Technologies, Georgian Technical University, Tbilisi, Georgia.

Goal: Low wolfram-containing cutting composite was obtained by fusion of titanium carbonitride and high melting temperature binding metallic phase. Method: The composite was obtained via compaction and further sintering in vacuum furnace at 1600°C under 10^-3 Pa pressure. Phase analysis was performed on X-ray apparatus “DRON-3”; microstructure was determined by electron microscope NANOLAB-7, microhardness by MUCKE-mark microhardness meter; relative resistance of cutters was evaluated at similar modes of cutting according to distances they passed; experiments were carried out on turning lathe. Results: Physical-mechanical characteristics of the obtained composite are: σ_bend, = 1000 - 1150 MPa, σ_bend1000°C = 600 MPa, HV = 14 GPa; HV₁₀₀₀°C = 6.5 GPa. High speeds of cutting and high temperatures resistance of cutters made by the obtained composites exceeds 1.5 - 2-folds that of cutters made of the known BK8 and KNT20 hard alloys. Conclusion: Its application is recommended in hot steel treatment by cutting, for removal of the so-called burrs, as well as in steel treatment by cutting during pure and semi-pure operations. It can also be used in jet engines, chemical industry apparatuses, electric-vacuum devices, in industry of responsible details of rockets, nuclear reactors, flying apparatuses.

Metal-Ceramic, Composite, Cutting Material, High-Temperature, Heatproof, Micro Hardness

Kovziridze, Z. , Nizharadze, N. , Tabatadze, G. , Nikoleishvili, E. and Mshvildadze, M. (2016) Metal-Ceramic Smart Composite in Ti(C,N)-Ni-Mo-W System. Journal of Electronics Cooling and Thermal Control, 6, 42-51. doi: 10.4236/jectc.2016.62004.