Study The Effect Of Cryogenic Cooling On Machinability Characteristics During Turning Duplex Stainless Steel 2205

In this study, the influence of cryogenic cooling using liquid nitrogen as a coolant on cutting temperature, cutting forces, roughness value, chip morphology and tool wear were investigated. For this purpose, duplex stainless steel 2205 was machined under dry cutting condition and cryogenic cooling environment. Turning process is carried out for three different cutting speeds (72, 119, 197 m/min) while 0.111 mm/rev feed rate and 1 mm cutting depth are to be constant. It was found that while turning duplex stainless steel 2205 with PVD coated Nano-multilayer TiAlN cutting tool insert under cryogenic cooling, the reduction in cutting temperature was 53 - 58 %, the decrease in cutting forces were 30 - 43 %, and the improvement in roughness value by about 18 - 23 % when compared with dry turning. It was also observed that reduced tool wear and saw tooth formation of chip under cryogenic cooling. The experimentally observed results indicated that the machinability indices of duplex stainless steel 2205 under cryogenic cooling by liquid nitrogen have shown better results than dry cutting conditions. (C) 2017 Elsevier Ltd. All rights reserved.