Effect of cooling and lubrication conditions on cutting performance and surface integrity of Inconel 718 superalloy in end face milling

Inconel 718 nickel-based superalloy has superior thermal and mechanical properties. Nevertheless, it is a hard-to-machine material, the heat generated by processing excessive. Reasonable cooling lubrication (CL) methods have essential effects on its cutting performance surface integrity. In this study, Dry (DC), flood (FC), cryogenic (CC), minimum quantity (CMQLC), are used to under same parameters. Cutting forces, temperature, tool wear, chip, Ra, microstructure, residual stress (RS) measured. It concluded that combination of CL beneficial for processing. The average temperature obtained CMQLC 55.47% lower than DC. And workpiece measured compared with FC, area chipping reduced 25%, Ra decreased 32.05%, lowest among four methods. As RS, although TRS increased 7.9%, MCRS influence depth subsurface 3.9% 10.2% respectively. Furthermore, machining condition high ratio can obtain more favorable RS state. Generally speaking, shows advantages mild environmental pollution, preferred performance,