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Year 2021 Volume 19, Issue 3 |
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Issues/2021/vol. 19 /Issue 3 |
T. S. Skoblo, S. P. Romaniuk, V. M. Romanchenko, E. L. Belkin, T. V. Maltsev, R. M. Muratov
«Hardening of Thin-Walled Knives by Nanostructured Coating and Their Operating Resistance
»
0547–0558 (2021)
PACS numbers: 62.20.Qp, 68.37.Hk, 79.40.+z, 81.15.Jj, 81.40.Pq, 81.70.-q
A new technological process of hardening thin-walled knives with a thickness of 0.64 mm and with a cutting edge of 0.1 mm, which are used in confectionery production, is proposed. For the hardening of them, the ion-plasma method of applying a nanostructured multilayer TiN coating is used. Statistical studies of the operational resistance of such a tool in industrial production when crushing nuts are carried out. The analysis of the obtained results shows that their operational resistance varies within a wide range from 10 to 210 work shifts. At the same time, the surface hardening coating applied with a thickness of 3.3 microns does not completely wear out. The main reasons for the failure of such a tool in operation are low quality of the metal products and processed products, which is caused by pores and cracks, the intensification of diffusion processes, and the formation of zones of heterogeneity in phase-components’ distribution. The kinetics of changes in the structure, the degree of its heterogeneity in the working layer during diffusion processes, which occur during operation and are responsible for the formation of defects and structural degradation, are investigated. Experimental and theoretical methods for describing structural changes on the friction surface of knives revealed the nature of the development of their damageability based on the formation of zones with different densities of alternating fragments (compression and vacuum zones).
Keywords: nanostructured coating, thin-walled tool, operational resistance, heterogeneity, diffusion of components, defects
https://doi.org/10.15407/nnn.19.03.547
References
1.T. S. Skoblo and S. P. Romaniuk, Khranenie i Pererabotka Selkhozsyr’ya,Iss. 7: 46 (2013) (in Russian).
2.T. S. Skoblo, A. I. Sidashenko, and S. P. Romaniuk, Konstruyuvannya, Vy-robnytstvo ta Ehkspluatatsiya Silskogospodarskykh Mashyn, 45, No. 1: 96(2015) (in Russian).
3.T. S. Skoblo, A. I. Sidashenko, S. P. Romaniuk, and R. M. Muratov, Meta-loznavstvo ta Termichna Obrobka Metaliv, 3, No. 70: 44 (2015) (in Russian).
4.S. P. Romaniuk, O. I. Sidashenko, T. S. Skoblo, Yu. M. Nezovybatko,I. Ie. Harkusha, and V. S. Taran, Sposib Pidvyshchennya EhkspluatatsiynoyiStiykosti Tonkostinnogo Rizhuchogo Instrumentu [The Method of Increasingthe Operational Stability of Thin-Walled Cutting Tools] (Patent 101699 UA.Ñ23Ñ 14/48, Ñ23Ñ 14/16) (Korysna Model?, 18) (2015) (in Ukrainian).
5.S. P. Romaniuk, Problemy Mashinobuduvannia [Journal of Mechanical En-gineering], 22, No. 4: 67 (2019); https://doi.org/10.15407/pmach2019.04.067
6.T. Skoblo, O. Klochko, E. Belkin, and A. Sidashenkî, International Journalof Mineral Processing and Extractive Metallurgy, 2, Iss. 3: 34 (2017);DOI: 10.11648/j.ijmpem.20170203.12
7.T. S. Skoblo, S. P. Romaniuk, A. I. Sidashenkî, I. E. Garkusha, V. S. Taran,À. V. Taran, and N. N. Pilgui, Journal of Advanced Microscopy Research,13, No. 3: 333 (2018); https://doi.org/10.1166/jamr.2018.1399
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