Numerical and Experimental Investigation of PVD Coating on Drilling Performance of Inconel 825 Alloy

Abstract

Inconel 825 is a nickel-based superalloy that presents significant difficulties throughout the drilling process because of its material qualities, operating circumstances, and stringent quality standards. Because of its poor thermal conductivity, heat builds up around the tool's tip and is trapped there, leading to premature wear. This research looks at how a high-tech PVD coating affects a drill's efficiency while working with Inconel 825, a nickel-based superalloy. Forces and torque are modelled for various cutting conditions and projected. Drilling performance is compared between coated and uncoated carbide tools methodically by using an analytical model, simulation, and tests to account for surface roughness, thrust force, and torque. Coated tools have been proven to need less force and torque than their uncoated counterparts. Cutting faster using a PVD-coated tool improved the surface quality. Constraints on the free flow of the chip during drilling lead the chip to thicken. The findings reveal that the chip resistance force is less when the tool is coated.