Surface Finish in Hard Machining by PVD-Coated End-Mills Using Solid Lubricant

The paper deals with machining of High C–High Cr die steel with Ti N, TiAlN Coated end mill cutter, using solid lubricant and obtaining a generalised relationship of surface roughness dependent on input parameters, based on response surface methodology. The hardness ratio of the tool and the workpiece, as one of the important parameters, having significant influence under near-dry machining condition, was studied under minimum quantity of oil using solid-lubricant (MOS₂) mixed with base oil SAE-20 in different proportion.