Taguchi optimisation of Turning Inconel 600 under dry and MQL condition using uncoated Tool

Abstract

Utilization of super alloys have been prominent in production now-a-days to achieve a superior qualified high strength of low weight products. Advance trends have been performed in order to understand the impact of lubricating and cooling effects while turning these hard to cut alloy steels which produces tremendous amount of heat while machining. Present paper deals with one of those hard-to-cut alloys, Inconel 600 one of the hot working capable nuclear alloy. Turning experiments was performed using an carbide tool insert with varying rake angles (-7, -5 and -3 degrees), speed (50, 75 and 100 mm/min) and feed rate (0.1,0.2 and 0.3 mm/rev). A total of 9 experiments were performed based on the DOE. Surface roughness was measured and comparison of surface roughness is done for both dry and MQL conditions. In order to evaluate the optimum turning condition Taguchi optimisation was employed. It was observed that for dry turning rake angle at -3 degrees, speed at 50m/min and feed at 0.1 mm/rev and rake angle at -3 degree, speed at 50 m/min and feed at 0.3 mm/rev for MQL turning was found to be optimum. A mathematical model for both the cases were also studied for turning operation.