Актуальные проблемы в машиностроении. Том 11. № 1-2. 2024 Материаловедение в машиностроении ____________________________________________________________________ 89 INCREASING THE MICROHARDNESS OF THE COMPOSITE IRON-BASED COATINGS Zhachkin S.Yu.1, D. Sc. (Engineering), Professor, e-mail: zhach@list.ru Trifonov G.I.2, Ph.D. (Engineering), senior researcher, e-mail: trifonov_gi@mail.ru 1Voronezh State Agrarian University named after Emperor Peter the Great, 1 Michurina str., Voronezh, 394087, Russian Federation 2 Federal State Official Military Educational Institution of Higher Education «Military Educational and Scientific Centre of the Air Force N.E. Zhukovsky and Y.A. Gagarin Air Force Academy», 54a Old Bolsheviks str., Voronezh, 394064, Russian Federation Abstract In this work, the results of a study of a composite material based on a powder PR-X11G4SR with a fraction of 40–64 μm containing a filler of titanium carbide (TiC) are obtained. The aim of the study is to determine the optimal composition of the material for plasma spraying with maximum microhardness of coatings. A multifactorial experiment was conducted on a central compositional rotatable plan to achieve this goal. Filler size (30–70 μm) and filler concentration (10–30 %) were selected as independent variables. The adhesion strength of the coating to the specimen base was chosen as a response function. The morphology and chemical composition of the resulting coating are analyzed. As a result, aspects are identified that explain the improvement of the microhardness of the coating during its plasma surfacing. Keywords microhardness, composite coating, plasma spraying, matrix, filler, experiment.
RkJQdWJsaXNoZXIy MTk0ODM1