Effect of combined cryogenic cooling and minimum quantity lubrication on machining characteristics of SS 316L
Authors :- Makhesana M.; Patel K.; Khanna N.
Publication :- Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, Sage, 2025
Implementing new approaches, such as cryogenic cooling, can solve the temperature-related challenges in machining while eliminating disposal problems, hazardous emissions, and associated problems. In this context, the comprehensive machinability evaluation of SS 316L utilizing hybrid minimum quantity lubrication (MQL) + LCO2 is presented by comparing the results of measured machining responses with dry, flood, MQL, and LCO2 cutting environments. Hybrid machining significantly reduced Ra values by up to 40.63, 32.15, 9.53, and 17.37%, compared to dry, flood, MQL, and LCO2 conditions. Similarly, compared to dry machining, approximately 44% reduction in cutting temperature is achieved with improved cooling and lubrication during MQL + LCO2. The outcomes demonstrated that the MQL + LCO2 application efficiently reduced frictional forces and reduced tool wear by up to 30.77% compared to dry machining. Relatively small diameter helical chips with surfaces free from scratches are produced under MQL + LCO2. The outcomes demonstrated the efficacy of MQL + LCO2 in improving the machining performance of SS 316L. The sustainability aspect of the presented approach is evaluated by considering total machining costs and carbon emissions.