Surface Behavior of AISI H13 Alloy Steel Machining under Environmentally Friendly Cryogenic MQL with PVD-Coated Tool

Abstract

Abstract Cooling and lubrication throughout the machining process have a vital impact on final product quality. Use of cutting fluid in the machining process will not control the increased heat generation that is due to frictional resistance, conventionally. Cryogenic machining along with minimum quantity lubrication (CMQL) is a reliable choice to flood cooling in pertinence. It averts the utilization of a large amount of cutting oil and it improves surface integrity. Carbon dioxide provides better cooling to the tool and work material. Additionally, the vegetable oil droplets provide better lubrication at the interface. The investigation results on the response of CMQL on machinability of AISI H13 steel with varying cutting speeds in the range of 45–75 m/min in end milling uses a PVD-AlTiN–coated carbide insert at a constant depth of cut. Machining with CMQL gives 52–53 % and 38–41 %, 65–71 %, and 33–41 % on cutting temperature and surface roughness, respectively, which is a dwindling value when interrelated with dry and flooded cooling environments, in which cutting forces and flank wear were subsequently reduced moderately when compared to dry and wet machining. Application of CMQL provides exceptional lubrication and cooling to the cutting zone.