CUTTING PERFORMANCE AND SURFACE INTEGRITY IN SUPERALLOY INCONEL 718 END FACE MILLING: THE INFLUENCE OF VARIOUS COOLING AND LUBRICATION CONDITIONS

Abstract

The nickel-based superalloy Inconel 718 is known for its exceptional mechanical and thermal properties. The high temperatures produced during its manufacture make Inconel a difficult material to work with. If you follow the correct cooling and lubrication (CL) procedures, it will cut much more effectively and keep the surface intact. Here we compare and contrast four different ways that Inconel 718 may be cut: cryogenic minimum quantity lubrication cutting (CMQLC), dry cutting (DC), flood cutting (FC), and cryogenic cutting (CC). A number of variables are monitored, including cutting forces, temperature, tool wear, chip size, Ra, microstructure, and RS. Adding CL improves processing, according to the findings. On average, CMQLC produces cooler results than DC. Among the four methods, CMQLC has the lowest effectiveness, reducing the tool chipping area by 25% and surface Ra by 32.05%. There was a 10.2% rise in the subsurface influence depth, a 7.9% increase in the TRS, and a 3.9% increase in the MCRS when considering the RS. Machining in circumstances of a high mechanical thermal ratio may also lead to a better RS state. Cutting performance, workpiece
surface integrity, and environmental pollution are all positively impacted by the CMQLC. Some of the terminology that are relevant are cutting performance, surface integrity, cooling and lubrication (CL), and Inconel 718.