Vladimir State University named after Alexander and Nikolay Stoletovs, Vladimir, Russia

E. S. Prusov, Professor, Department of the Functional and Constructional Materials Technology

A. V. Aborkin, Associated Professor, Department of the Technology of Mechanical Engineering

Vladimir State University named after Alexander and Nikolay Stoletovs, Vladimir, Russia¹ ; Wuhan Textile University, Wuhan, China² ; National University of Science and Technology MISiS, Moscow, Russia³
V. B. Deev*, Professor, Chief Researcher¹, Professor of the Faculty of Mechanical Engineering and Automation², Professor of the Department of Metal Forming³, e-mail: deev.vb@mail.ru

*Correspondence author.

This study worked out the temperature-time parameters for processing conditioned waste of cast aluminum matrix composites with exogenous carbide phases through direct remelting. Using mathematical planning of the experiment and statistical analysis, it was found that the main factor influencing the change in the mechanical and tribological properties of composite materials during remelting is the duration of melt exposure before pouring. Using the example of the composite material AlSi12 + 10 vol.% SiC, it was demonstrated that, in general, an exposure duration of up to 15 min does not critically affect the change in the properties of aluminum matrix composites during remelting. However, a further increase in the exposure duration is accompanied by a significant decrease in hardness and compressive strength, as well as a significant scatter of friction coefficient values under dry sliding friction conditions. An analysis of the reasons for the change in the nature of the mechanical and tribological behavior of cast compo site materials at various temperature-time parameters of remelting was carried out based on consideration of the characteristics of the properties of recycled composites in relation to their structure. The results obtained allow us to recommend reducing the duration of liquid-phase contact of the components at elevated temperatures to maximize the preservation of the level of properties of aluminum matrix composites after recycling via remelting.
This research was funded by the Russian Science Foundation (Project № 21-79-10432, https://rscf.ru/project/21-79-10432/).

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