A Comparative Study on the Cutting Performance of Uncoated, AlTiN and TiCN-Al2O3 Coated Carbide Inserts in Turning of Invar 36 Alloy
Abstract
The present work focuses on a comparison of the performance of, a two-layer (TiCN-Al2O3) coated, the single-layer (AlTiN), and uncoated inserts in the machining of Invar 36, which is a difficult material to cut. The cutting performance of these tools has been appraised regarding cutting force (Fc), surface roughness (Ra), tool wear (Vb), and power consumption (Pc). Statistical analyzes were applied to determine the sustainable processing parameters of Invar 36. The outcomes of this study show that the two-layer (TiCN-Al2O3) coated insert performs a significant exhibiting in improving the cutting performance of Invar 36 alloy comparison with uncoated and single-layer (AlTiN) coated inserts. The tool wear is about 30% and 60% better using the two-layer (TiCN-Al2O3) coated insert than the single-layer (AlTiN) coated and uncoated inserts, respectively. The statistical analysis results, on the other hand, show that the ideal level groups for the lowest Fc, Ra, Vb, and Pc were A3B3C1, A3B3C1, A3B1C1, and A3B1C1, respectively. Moreover, the models developed to estimate the output parameters (Fc, Ra, Vb, and Pc) give successful results with high coefficients of determination (R2) of 93.18%, 98.79%, 98.05%, and 98.11%, respectively.
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