OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 1 2025 Improving the performance characteristics of grey cast iron parts via ion implantation Olga Usanova 1, a, Anna Ryazantseva 1, b, *, Marina Vakhrusheva 2, c, Marina Modina 3, d, Yulia Kuznetsova 3, e 1 Moscow Polytechnic University, 38 B. Semenovskaya str., Moscow, 107023, Russian Federation 2 Bratsk State University, 40 Makarenko Str., Bratsk, 665709, Russian Federation 3 Admiral Ushakov Maritime State University, 93 Lenin Ave., Novorossiysk, 353924, Russian Federation a https://orcid.org/0000-0002-4399-5074, olus2000@mail.ru; b https://orcid.org/0000-0002-6558-3089, rav300576@mail.ru; c https://orcid.org/0000-0002-6118-9527, mvahr@yandex.ru; d https://orcid.org/0000-0003-2482-5472, marishamodina@yandex.ru; e https://orcid.org/0000-0002-1388-6125, julx@bk.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2025 vol. 27 no. 1 pp. 143–154 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2025-27.1-143-154 ART I CLE I NFO Article history: Received: 30 September 2024 Revised: 19 October 2024 Accepted: 21 November 2024 Available online: 15 March 2025 Keywords: Cast iron Ion implantation Microstructure Microradiometric analysis Phase composition X-ray diffraction analysis ABSTRACT Introduction. Cast iron is a material that is widely used in various industries. It possesses high heat capacity, relatively high hardness, and a number of other physical, mechanical and technological properties. Due to the significant operational stress experienced by the working surfaces of cast iron parts and its frequent exposure to aggressive environments, additional surface treatment is required to enhance wear resistance, corrosion resistance, and other properties. There are many different methods of surface modification. One of the most promising and modern ones is ion implantation with various ions. The purpose of the work is thus to study the effect of ion implantation on the surface of cast iron and the resulting changes in its mechanical properties. Methods. Cast iron samples were implanted with nitrogen ions of different doses (optimal dose of implanted nitrogen ions as a nitride-forming element). The surface microstructure of cast iron samples was investigated using a scanning electron microscope Stereoscan S-180 at a magnification of ×2,900 and ×5,000. Microdurometry analysis of the samples was carried out using a Neophot-2 metallographic microscope equipped with an attachment for measuring microhardness, at a load of 10 g after implantation of cast iron samples with various doses of nitrogen ions. In addition, X-ray diffraction analysis was performed on a DRON-3 diffractometer to determine the phase composition and fine structure of modified cast iron samples. Results and Discussion. Ion implantation of cast iron samples significantly increases microhardness. Thus, the conducted study reveals that the best mechanical properties (specifically microhardness) are observed in cast iron samples after implantation by N+ ions with a dose of 5×1017 ions/cm2 with energy of 40 KeV. X-ray diffraction analysis demonstrated that the ion implantation with nitrogen results in the formation of Fe2N and Fe2N nitrites, and also revealed changes in fine structure (average dislocation density and size of mosaic blocks). For citation: Usanova O.Yu., Ryazantseva A.V., Vakhrusheva M.Yu., Modina M.A., Kuznetsova Yu.S. Improving the performance characteristics of grey cast iron parts via ion implantation. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2025, vol. 27, no. 1, pp. 143–154. DOI: 10.17212/1994-6309-2025-27.1-143-154. (In Russian). ______ * Corresponding author Ryazantseva Anna V., Ph.D. (Engineering), Associate Professor Moscow Polytechnic University, 38 B. Semenovskaya str., 107023, Moscow, Russian Federation Tel.: +7 967 114-12-30, e-mail: rav300576@mail.ru Introduction Cast iron has a number of properties that make it indispensable in the manufacture of various parts [1], such as piston rings, bushings, turbine parts, etc. The strength characteristics of cast iron enable its use in manufacturing components subjected to heavy loads and parts that can withstand water and steam. However, there is a problem of improving the surface properties of cast iron (wear resistance, corrosion resistance, etc.).
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