Effect of Machining Environment on Turning Performance of Austempered Ductile Iron

The turning experimental work carried on 700/3 grade austempered ductile iron using coated tungsten carbide insert using cutting speed from 50 to 200 m/min, feed from 0.1 to 0.3 mm/rev and depth of cut from 0.1 to 1.0 mm. The microstructure, surface roughness, wear mechanism and chip characteristics examined using Leica Microscope, Nikon Measuroscope and Mitutoyo Surface Roughness Tester. The adhesion and abrasion wear observed on tool in different machining environment. Nose wear observed in flood environment at 200 m/min cutting speed while chipping observed in minimum quantity lubrication (MQL) and dry environment. The comparison of dry, MQL and flood coolant environment studied on basis of analysis of extreme level of cutting parameters. The comparative study revealed MQL environment has lower tool wear and surface roughness value, therefore percentage increase in surface roughness and tool wear of dry and flood environment over MQL examined. The sustainability assessment suggested MQL effective machining environment for moderate machining parameters.