Investigation on Turning Parameters of Austempered Ductile Iron Using Response Surface Methodology Approach

Austempered ductile iron (ADI) is an alternative to hardened steel for machined parts with high hardness, ductility, strength and fatigue strength. The optimal cutting parameters to perform turning operation on ADI with PCBN insert are predicted through the response surface methodology (RSM) approach. Design Expert Software was used to design fifteen experiment trials by changing cutting parameters including speed (N) rpm, feed (f) mm/min, and depth of cut (d) mm. The outcomes of the experiments were then examined. The mathematical model determined in the Analysis of Variance (ANOVA) satisfied output responses concerning the input parameters. The optimal turning parameters, N: 1039.11 rpm, f: .5 mm/min and d: 0.0974 mm is revealed the both responses. The confirmation experiment results revealed that the predicted value of responses is better in agreement with experimented responses. The optimal turning parameters recommended to industries application to machine the ADI with significant production.