OPTIMIZATION OF THERMOPHYSICAL PROPERTIES OF CUTTING FLUIDS IN METAL MACHINING UNDER MQL CONDITIONS

The article presents a review of recent studies devoted to the thermophysical properties of metalworking fluids (MWFs) and nanomodified lubricants used under Minimum Quantity Lubrication (MQL) conditions in metal machining processes. The main types of MWFs – oil-based, water-based, and emulsified fluids – are considered, along with their thermophysical characteristics and operational requirements under intensive cutting conditions.
Special attention is paid to the effect of adding various nanoparticles (Al₂O₃, TiO₂, SiO₂, ZnO, graphene, etc.) on enhancing the thermal conductivity of MWFs, as well as reducing friction, viscosity, density, and specific heat capacity. The analysis of publications made it possible to evaluate the potential of nanomodified MWFs in MQL technology.
The research findings indicate that the use of nanomodified MWFs increases heat transfer intensity, reduces tool wear, and improves machining efficiency by optimizing fluid consumption. In addition, the need to regulate the MWF composition and nanoparticle concentration to optimize thermal conductivity and viscosity parameters is emphasized.
The article provides a scientific basis for further research and practical application of nanomodified MWFs under MQL conditions, contributing to the development of energy-efficient and environmentally safe metal machining processes.

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