This paper presents reduction of surface roughness in dry turning of Aluminum 8019 alloy using TiN-TiCN-Al2O3-ZrCN multilayer coated cemented carbide & uncoated cryo-treated inserts. Effect of cutting velocity, feed rate, depth of cut and machining duration is studied on the surface roughness. Taguchi's design of experiment is used to find the optimum factor levels. From this experiment we came into a conclusion that the feed rate has much effect in producing lower surface roughness followed by speed. The depth of cut has lesser role on surface roughness. The result of Taguchi method shows that cutting speed of 2000 rpm, feed rate of 0.2 mm/rev and depth of cut of 0.75mm should be maintained as optimal parameter settings for both coated and uncoated tools.
Cryogenic, Dry Turing, Surface roughness, Taguchi Method
