OBRABOTKAMETALLOV Vol. 28 No. 1 2026 43 TECHNOLOGY Optimization of fi nishing turning parameters for a metal–composite system with a 2-mm-thick metal external layer based on criteria of thermal load and cutting tool wear Nikolay Lubimyi a, *, Boris Chetverikov b, Mikhail Gerasimov c, Andrey Polshin d, Ardalion Maltsev e, Mikhail Bytsenko f, Alexander Tikhonov g Belgorod State Technological University named after V.G. Shukhov, 46 Kostyukova St., Belgorod, 308012, Russian Federation a https://orcid.org/0000-0002-6131-3217, nslubim@bk.ru; b https://orcid.org/0000-0003-1801-6767, await_rescue@mail.ru; c https://orcid.org/0000-0001-9073-5649, mail_mihail@mail.ru; d https://orcid.org/0000-0001-5809-4458, info@polshin.ru; e https://orcid.org/0000-0002-0878-3658, ardalion_bgtu@mail.ru; f https://orcid.org/0009-0004-2133-885X, b.michutka2005@gmail.com; g https://orcid.org/0000-0003-4450-502X, cherep2240@rambler.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. 2026 vol. 28 no. 1 pp. 29–45 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2026-28.1-29-45 ART I CLE I NFO Article history: Received: 17 November 2025 Revised: 17 December 2025 Accepted: 23 December 2025 Available online: 15 March 2026 Keywords: Metal-composite systems Additive manufacturing Metal-polymer composites Cutting temperature Interface Modeling Optimization Funding This study was supported by grant No. 23-79-10022 from the Russian Science Foundation, https://rscf.ru/ project/23-79-10022/. Acknowledgements The study was performed using the facilities of the High Technologies Center of Belgorod State Technological University named after V.G. Shukhov. ABSTRACT Introduction. The study addresses the challenge of selecting fi nishing turning parameters for a metalcomposite system comprising a thin metal external layer (2 mm thick) produced by selective laser melting and containing an internal metal-polymer fi ller. The relevance of the work is driven by the need to ensure the machining quality of the outer surface while adhering to strict temperature constraints at the metal-polymer interface, imposed by the low thermal resistance of the fi ller material. Purpose of the work is to develop and implement a multi-criteria optimization approach for the fi nishing turning parameters of the metal-composite system. This approach is based on previously developed regression models for the interface temperature and cutting tool wear, and aims to minimize tool wear while satisfying temperature constraints and surface quality requirements. Methodology. The methodology is based on a previously developed 2T3-type regression model for predicting temperature at the metal-metal-polymer interface and a cutting tool wear model formulated as a generalized Fick-Taylor equation for a cemented carbide insert (grade AH6225). Using these models, a mathematical programming problem with a nonlinear temperature constraint is formulated and solved via the sequential quadratic programming (SQP) method within specifi ed ranges of cutting speed, feed rate, and depth of cut. Results and discussion. The numerical implementation of the proposed approach yielded the domains of admissible and optimal fi nishing turning parameters for the metal-composite system, based on criteria of thermal load and tool wear. The depth of cut was identifi ed as the dominant factor infl uencing the temperature at the metal-metal-polymer interface. It was shown that the temperature constraint defi nes the boundaries of the admissible parameter domain. Specifi c combinations of cutting speed, feed rate, and depth of cut were determined that simultaneously satisfy the polymer’s temperature limit and ensure an acceptable wear level for the AH6225 carbide inserts. For citation: Lubimyi N.S., Chetverikov B.S., Gerasimov M.D., Polshin A.A., Maltsev A.K., Bytsenko M.V., Tikhonov A.A. Optimization of fi nishing turning parameters for a metal–composite system with a 2-mm-thick metal external layer based on criteria of thermal load and cutting tool wear. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2026, vol. 28, no. 1, pp. 29–45. DOI: 10.17212/1994-6309-2026-28.1-29-45. (In Russian). ______ * Corresponding author Chetverikov Boris S., Ph.D. (Engineering), Associate Professor Belgorod State Technological University named after V.G. Shukhov, 46 Kostyukova St., 308012, Belgorod, Russian Federation Tel.: +7 951 134-32-43, e-mail: await_rescue@mail.ru
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