Machinability study on stainless steel and optimum setting of cutting parameters in turning process using Taguchi design of experiments

Goal of the metal cutting industries is to manufacture high quality products in short time. Surface quality is one of the most specified customer requirements in machining products. Surface quality of roughness is critical to the functional ability of machined components. Austenitic stainless steels (AISI 316) are generally regarded as more difficult to machine material due to their high strength, ductility and high work hardening tendency. Surface roughness (SR) is a vital role requirement in determining the surface quality of the product. The minimisation of SR is essential for the achievement of high quality. In this paper is to analyse the SR produced by CNC turning process on AISI 316 by different cases of coated cutting tool used at dry conditions. Multi-layered coated with TiCN+Al2O3 for first case and single-layered coated with (Ti, Al)N for second case. Experiments were carried out by using Taguchi’s L27 orthogonal array. The effect of cutting parameters on SR was evaluated and optimum cutting conditions for minimising the SR was determined. Analysis of variance (ANOVA) was used for identifying the significant parameters affecting the responses.