The authors have evaluated eco-friendly base fluids for hardening steel such as canola oil and soybean oil to identify alternative renewable quenchants using basestocks available in Ukraine. Meso- and nanofluids were prepared by the discrete-pulse input of energy (DPIE) method. It has been established that the cooling intensity of these quenchants depends not only on the composition of the base fluid and the meso- or nanoparticles but also on the methods of preparation. The influence of the DPIE method on cooling characteristics of vegetable oils was studied. High-temperature cooling properties within the temperature range of 200°C–850°C exceed the observed properties of traditional mineral oil-based quenchants.
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