Tool wear reduction in machining Inconel 718 by using novel sustainable cryo-lubrication techniques

Abstract

Combining different cooling and lubrication strategies to reduce the tool wear and enhance the machinability of Inconel 718 is a new approach to be studied. In this regard, the present article uses two different cooling strategies to increase the machinability of Inconel 718. Six different approaches of cooling strategies, i.e., Cryo-MQL (LCO2 delivers on rake and MQL on Flank), MQL- Cryo, EMQL- Cryo, Cryo -EMQL, EMQL-MQL and MQL-EMQL are used for experiments. The tool wear, specific cutting energy, power consumption, surface roughness, and chip morphology are inspected. The flow of LCO2 on the rake face and the EMQL on the flank face considerably reduce the tool wear, surface roughness, power and specific cutting energy consumption, in comparison to other strategies. This novel combination of LCO2 and EMQL improves sustainability without compromising surface quality in machining Inconel 718.