Metal-Ceramic Smart Composite in Ti(C,N)-Ni-Mo-W System
| Autor: | G. Tabatadze, N. S. Nizharadze, E. Nikoleishvili, Zviad Kovziridze, M. Mshvildadze |
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| Rok vydání: | 2016 |
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| Zdroj: | Journal of Electronics Cooling and Thermal Control. :42-51 |
| ISSN: | 2162-6170 2162-6162 |
| DOI: | 10.4236/jectc.2016.62004 |
| Popis: | 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: σbend, = 1000 - 1150 MPa, σbend1000°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. |
| Databáze: | OpenAIRE |
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