The paper presents the results of a study on the cyclic strength of cutting ceramics: a replaceable polyhedral plate developed at NSTU and VOK-60 cutting ceramics when processing a hardened steel billet made of HVG steel (45 HRC) with two opposite grooves. Turning was performed until the cutting edge of the plates was destroyed. Using the HITACHI S3400N electron microscope, the structure of the destroyed surface layer was investigated and the mechanism of destruction of the cutting edge of tool plates made of cutting ceramics was determined. It has been established that the developed cutting ceramics have a greater resistance to fracture under conditions of intermittent turning of hardened steel compared to the VOK-60 brand. The low operability of the cutting plates made of the developed ceramics under conditions of intermittent turning is mainly caused by the chipping of the cutting edge due to the formation of microcracks at the grain boundaries. A characteristic feature of the mechanism of brittle fracture of cutting ceramics is intergrain tearing and chipping of large Al2O3 grains.
Alexander I. Pronin – PhD (Eng.), candidate of technical sciences, associate professor of the Department OF “Mechanical Engineering”, Komsomolsk-na-Amur State University (ME KnASU), Komsomolsk-on-Amur, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Vladimir V. Mylnikov – PhD (Eng.), candidate of technical sciences, associate professor of the Department of Construction Technologies, Faculty of Civil Engineering, Nizhny Novgorod State University of Architecture and Civil Engineering (TSP ISF NNGASU), Nizhny Novgorod, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Sergey V. Veselov – PhD (Eng.), candidate of technical sciences, associate professor of the Department of “Materials Science in Mechanical engineering”, Novosibirsk State Technical University, (MSiME NSTU) Novosibirsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Dmitry A. Valko – graduate student of the Department of “Mechanical Engineering”, Komsomolsk-na-Amur State University (ME KnASU), Komsomolsk-on-Amur, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
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DOI: 10.14489/glc.2022.06.pp.029-033
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