LAUSR

ABSTRACT The objective of this study is to analyse the surface finish achieved during turning of AISI 4340 cylindrical steel components in three machining conditions namely, flooded, near-dry and dry conditions with three separate CNMG 431-PF 4325 800 diamond finish Titanium Nitride (TiN) coated carbide cutting tool. The machining parameters considered in this study are cutting velocity, feed rate and depth of cut. The surface roughness of the machined components is measured using a surface roughness tester and subsequently, a mathematical model is developed for the average surface roughness values through regression analysis. The significance of the selected machining parameters and their levels on surface roughness is found by analysis of variance (ANOVA) and F-test. The results revealed that machining under near-dry condition provides better product surface quality in equivalence with the machined product surface quality under flooded condition.