Abstract:

In this study, the Taguchi method has been applied to evaluate the surface integrity features of AISI 316L by using CVD TiAlN/Al2O3/TiCN coated carbide inserts with three different tool geometry under dry milling conditions. Several experiments were conducted using the L18 (2x3x3x3) an experimental design with an orthogonal array on a CNC turning. Analysis of variance (ANOVA) was used to determine the effects of the machining parameters on average surface roughness, circumferential and axial surface residual stresses and degree of work hardening. The depth of cut, cutting tool geometry, cutting speed and feed rate were selected as machining parameters. It was observed that the processing parameters had different effects on the quality properties. The depth of cut was a relatively efficient parameter on surface roughness and had no significant effect on other quality properties. Tool geometry was not affect the average surface roughness. However, it was more effective on the degree of hardening, circumferential and axial surface residual stresses, respectively. It was determined that the cutting speed had a more significant effect on the axial and circumferential surface residual stresses, and the degree of hardening, respectively. While the feedrate had a very high effect on the surface roughness, it was observed that it also had a significant effect on the circumferential and axial surface residual stresses, and the degree of hardening, respectively.

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