Modeling and analysis of surface roughness on machining of Nimonic C-263 alloy by PVD coated carbide insert

The effects of the cutting parameters (cutting speed, feed rate and depth of cut) on the surface roughness in machining the Nimonic C-263 alloy were investigated. The experiments were conducted using Taguchi's experimental design. The effect of cutting parameters on surface roughness was evaluated and the optimum cutting conditions for minimizing the surface roughness were determined. A second order model was established between the cutting parameters and surface roughness, using the response surface methodology. The experimental results revealed that among the parameters considered, the feed rate is the most significant which influences the surface roughness, followed by the cutting speed. The predicted values and measured values are fairly close, which indicates that the developed model can be effectively used to predict the surface roughness in machining the Nimonic C-263 alloy. The predicted values are validated using the additive law.

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