Graph Theory and Matrix Approach for Machinability Enhancement of Cryogenic Treated Cobalt Bonded Tungsten Carbide Inserts

Cryogenic treatment is a sustainable manufacturing process preferred to improve the properties of the material. In the present study, the effect of cryo treated tungsten carbide cobalt bonded insert (WC-Co) measured in terms of tool life and surface finish on dry turning on high strength AISI4340 steel at different machine parametric conditions. The observations of Untreated (UT) and Deep Cryo Treated (DCT) inserts were compared. Formation and the distribution of eta phase carbides are verified by Scanning Electron Micrograph (SEM). The DCT insert shows a reduction in 27.27% tool wear with an acceptable level of surface finish. Taguchi's coupled Graph Theory and Matrix Approach (TC-GTMA) is used to predict the optimum machining condition and to substantiate the results the validation experiment is conducted and found satisfactory.