OBRABOTKAMETALLOV Vol. 24 No. 1 2022 TECHNOLOGY Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2022 vol. 24 no. 1 pp. 6–22 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2022-24.1-6-22 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Normal force infl uence on smoothing and hardening of steel 03Cr16Ni15Mo3Ti1 surface layer during dry diamond burnishing with spherical indenter Viktor Kuznetsov 1, 2, 3, a,*, Aleksey Makarov 1, b, Andrey Skorobogatov 3, c, Polina Skorynina 4, d, Sergey Luchko 1, e, Vitalij Sirosh 1, f, Nikolay Chekan5, g 1 M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, 18 S. Kovalevskoy str., Ekaterinburg, 620108, Russian Federation 2 Ural Federal University named after the fi rst President of Russia B.N. Yeltsin, 19 Mira str., Ekaterinburg, 620002, Russian Federation 3 Federal State Budgetary Institution “National Ilizarov Medical Research Centre for Traumatology and Ortopaedics” Ministry Healthcare, Russian Federation, 6 M. Ulyanova st., Kurgan, 640014, Russian Federation 4 Institute of Engineering Science Ural Branch, Russian Academy of Sciences, 34 Komsomolskaya st., Ekaterinburg, 620049, Russian Federation 5 Physical-Technical Institute of National Academy of Sciences of Belarus, 10 Akademika Kuprevicha st., Minsk, 220141, Belarus a https://orcid.org/0000-0001-8949-6345, wpkuzn@mail.ru, b https://orcid.org/0000-0002-2228-0643, avm@imp.uran.ru, с https://orcid.org/0000-0001-7447-1962, ufo2log@gmail.com, d https://orcid.org/0000-0002-8904-7600, polina.skorynina@mail.ru, e https://orcid.org/0000-0002-2368-0913, serojaluchko@gmail.com, f https://orcid.org/0000-0002-8180-9543, sirosh.imp@yandex.ru, g https://orcid.org/0000-0002-3339-9922, chekan@phti.by ART I CLE I NFO Article history: Received: 15 December 2021 Revised: 03 January 2022 Accepted: 15 January 2022 Available online: 15 March 2022 Keywords: Austenitic steel Finish turning Diamond burnishing Burnishing force Roughness Microhardness Funding The research was supported by the Russian Foundation for Basic Research and the Belarusian Republican Foundation for Fundamental Research (Project No. 20-58-00057) and carried out within the state assignments of the Institute of Metal Physics, RAS (Ural Branch) on the topic No. АААА-А18-118020190116-6 and the Institute of Engineering Science, RAS (Ural Branch) on the topic No. АААА-А18-118020790148-1. Acknowledgements Research were partially conducted at core facility “Structure, mechanical and physical properties of materials” ABSTRACT Introduction. Sliding burnishing minimizes roughness and hardens of the steel surface. Quality of the formed surface and strength characteristics of the surface layer are determined by the burnishing speed, force and feed. Due to the danger of the surface micro-destruction during burnishing, the problem of selecting the favorable value of the normal force at a given feed arises. The current investigation aims to study the effect of normal force during dry diamond burnishing with a spherical indenter on smoothing the surface microprofi le and strain hardening of the 03Cr16Ni15Mo3Ti1 austenitic steel surface layer. Research methods. Profi lometry, scanning electron microscopy (SEM), microdurometry are used. Results and discussion. As the result of dry burnishing of deformation-stable austenitic steel 03Cr16Ni15Mo3Ti1 with a spherical indenter with a 2 mm radius made of natural diamond at a sliding speed of 10 m/min and feed rate of 0.025 mm/rev, it is found that in the investigated variation range of the burnishing normal force (100...200 N) the value of the smoothing coeffi cient of the initial steel surface microprofi le after fi nish turning is 79...90 %, the greatest smoothing with a decrease in the average roughness parameter Ra from 1.0 to 0.1 μm is achieved at a force of 150 N; during diamond burnishing the initial (after fi nish turning) surface is hardened by 15...43 % (up to 382...444 HV), as the burnishing force raises from 100 to 175 N, a non-monotonic increase of the average microhardness from 409 to 444 HV 0.05 takes place; burnishing with a load of 175 N forms a gradient-hardened layer with a thickness of 300...350 μm with the appearance of individual microfractures in the form of beadings and micro-cracks on the surface, the maximum hardening is caused by the formation of a highly dispersed surface layer of 30...40 μm thick with a structure of highly dispersed austenite and the corresponding activation of grain-boundary and dislocation strengthening mechanisms. The results can be used when selecting the diamond burnishing parameters of parts made of corrosion-resistant austenitic steels according to the criteria for obtaining low surface roughness without signifi cant microfractures and effective strain hardening of the surface layer. For citation: Kuznetsov V.P., Makarov A.V., Skorobogatov A.S., Skorynina P.A., Luchko S.N., Sirosh V.A., Chekan N.M. Normal force infl uence on smoothing and hardening of steel 03Cr16Ni15Mo3Ti1 surface layer during dry diamond burnishing with spherical indenter. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2022, vol. 24, no. 1, pp. 6–22. DOI: 10.17212/1994-6309-2022-24.1-6-22. (In Russian). ______ * Corresponding author Kuznetsov Viktor P., D.Sc. (Engineering), Professor Ural Federal University named after the fi rst President of Russia B.N. Yeltsin, 19 Mira st., 620002, Ekaterinburg, Russia Tel.: 8 (982) 422-17-77, e-mail: wpkuzn@mail.ru
RkJQdWJsaXNoZXIy MTk0ODM1