Prediction of heat removal rate and surface finish in MQL with coconut oil-based NCF for Inconel machining

The environment-friendly minimum quantity lubrication (MQL) technology is used to extend tool life at a low cost. The flow rate in MQL is lower and produces good results when compared to existing cooling techniques. The novel 'CBN TNMG TNMG cutting tool insert for MQL with coconut oil-based SiC-MWCNT nano cutting fluid' is proposed. A cubic boron nitride (CBN) insert is used for machining of Inconel alloy 718 that has high resistance to wear, friction, and compressive stress. This thereby avoids the BUE formation in the workpiece. Silicon carbide (SiC) and multi-walled carbon nano tubes (MWCNT) are added to coconut oil with an appropriate volume fraction for better heat removal rate from the workpiece, and tool during turning. The thermal properties of the proposed nano cutting fluid are compared with those of some existing nano MQL cutting fluids and it was found that the proposed MQL cutting fluid has a high heat removal rate and reduces friction and it improves the surface finish of the workpiece. The result obtained by the proposed model efficiently solved the existing problems with high thermal conductivity, less temperature gradient, and low surface roughness in the workpiece.