Abstract
In the present investigation, wear of the PVD coated TiAlN carbide insert and the surface finish parameter of the machined Hastelloy C-22 surface have been studied under dry and cryogenic turning. Machining tests were carried out at cutting velocity range of 0.7 - 2.1 m/s, feed of 0.11 and 0.13 mm/rev and a depth of cut of 1 mm. It has been found that the roughness parameter (Ra) was reduced to a maximum of 54 % in cryogenic turning using liquid nitrogen over dry turning. Cryogenic liquid nitrogen cooling enabled substantial improvement in cutting performance of inserts in terms of reduction in wear rate by cooling and lubricating effect at the sources of heat, sliding and interacting regions
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