OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 7 No. 2 2025 Conclusions 1. Performance tests have shown the promising use of ceramic powder of TZ-3Y20AB (Y-TZP-Al2O3) grade, obtained by the technology of cold isostatic pressing followed by high temperature free sintering, for manufacturing of cutting inserts RNGN 120400-01 for turning hardened steel AISI 5135 (HRC 43–48). 2. It is not advisable to use the following cutting modes due to the short-term operation of the cutting edge of the cutting insert: V > 200 m/min; S > 0.4 mm/rev; t > 0.2 mm. The use of an insert with a blunt edge ensures stable turning on a cutting path of at least 3,300 mm when using the following cutting modes: V = 200 m/min; S = 0.25 mm/rev; t = 0.1 mm 3. Electron microscopy of wear and fracture sites demonstrates the dominant mechanism of brittle fatigue fracture caused by the thermal cycling effect of friction and tangential stresses in the cutting region. 4. The Y-TZP-Al2O3 ceramic composition is suitable for use as a tool material intended for dry high-speed turning of heat-treated steels of increased hardness. However, it is necessary to conduct comprehensive studies formalizing the effect of machining modes on the durability and roughness of machined surfaces both when cutting hard steels and wear-resistant cast irons. References 1. Basu B. Toughening of yttria-stabilised tetragonal zirconia ceramics. International Materials Reviews, 2005, vol. 50 (4), pp. 239–256. DOI: 10.1179/174328005X41113. 2. Patel H., Patil H. Tribological performance based machinability investigations of Al2O3-ZrO2 ceramic cutting tool in dry machining of Ti-6Al-4V alloy. Tribology International, 2022, vol. 176, p. 107776. DOI: 10.1016/j. triboint.2022.107776. 3. Perry C., Liu D., Ingel R.P. Phase characterization of partially stabilized zirconia by Raman spectroscopy. Journal of the American Ceramic Society, 1985, vol. 68 (8), pp. C-184–C-187. DOI: 10.1111/j.1151-2916.1985. tb10176.x. 4. Nettleship I., Stevens R. Tetragonal zirconia polycrystal (TZP) – A review. International Journal of High Technology Ceramics, 1987, vol. 3, pp. 1–32. DOI: 10.1016/0267-3762(87)90060-9. 5. ArinM., Goller G., Vleugels J., Vanmeensel K. Production and characterization of ZrO2 ceramics and composites to be used for hip prosthesis. Journal of Materials Science, 2008, vol. 43 (5), pp. 1599–1611. DOI: 10.1007/s10853007-2343-x. 6. Mayer T., Kieren-Ehses S., Kirsch B., Aurich J.C. Comparison of different 3Y-TZP substrates for the manufacture of all-ceramic micro end mills with respect to the cutting edge radius and the tool wear. Manufacturing Letters, 2023, vol. 38, pp. 44–46. DOI: 10.1016/j.mfglet.2023.09.001. 7. Dyatlova Ya.G., Kovelenov N.Yu., Rumyantsev V.I., Ordanyan S.S. Novaya rezhushchaya keramika v sisteme Al2O3–ZrО2(Y2O3)–Ti(C,N) [New cut-ting Al2O3/ZrO2/TI(C,N) ceramics]. Metaloobrabotka = Metalworking, 2014, no. 1 (79), pp. 32–36. 8. Senthil Kumar A., Raja Durai A., Sornakumar T. Machinability of hardened steel using alumina based ceramic cutting tools. International Journal of Refractory Metals and Hard Materials, 2003, vol. 21 (3–4), pp. 109–117. DOI: 10.1016/S0263-4368(03)00004-0. 9. Basha M.M., Basha S.M., Singh B.K., Mandal N., Sankar M.R. A review on synthesis of zirconia toughened alumina (ZTA) for cutting tool applications. Materials Today: Proceedings, 2020, vol. 26, pt. 2, pp. 534–541. DOI: 10.1016/j.matpr.2019.12.134. 10. Smuk B., Szutkowska M., Walter J. Alumina ceramics with partially stabilized zirconia for cutting tools. Journal of Materials Processing Technology, 2003, vol. 133, pp. 195–198. DOI: 10.1016/S0924-0136(02)00232-7. 11. Liang X., Liu Z., Liu W., Li X. Sustainability assessment of dry turning Ti-6Al-4V employing uncoated cemented carbide tools as clean manufacturing process. Journal of Cleaner Production, 2019, vol. 214, pp. 279–289. DOI: 10.1016/j.jclepro.2018.12.196. 12. Liu W., Wu H., Xu Y., Lin L., Li Y., Wu S. Cutting performance and wear mechanism of zirconia toughened alumina ceramic cutting tools formed by vat photopolymerization-based 3D printing. Ceramics International, 2023, vol. 49 (14), pt. A, pp. 23238–23247. DOI: 10.1016/j.ceramint.2023.04.153.
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