Abstract
The aim of the present investigation is to identify the wear mechanisms of multilayer coated carbide tool under different machining conditions during turning of hardened AISI 4340 steel. The chemical vapor deposited multilayer coated (TiN/MT TiC,N/Al2O3) carbide tool was used. The worn surfaces of the cutting tools were examined under digital optical microscope, scanning electron microscope, and elemental analysis. The investigation results showed a strong correlation between the cutting conditions and tool wear. The cutting speed and feed rate ensure the dominant effects on the tool wear followed by the depth of cut and also the progress of tool wear were verified under different intervals of time. The flank and rake faces of the cutting tool were severely gouged by the hard particles of workpiece material exhibited abrasive wear phenomenon. Intermittently, chipping at cutting edge, notching and catastrophic failure modes were observed in continuous machining.
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ACKNOWLEDGMENT
The authors are thankful to Kennametal India Ltd., Bangalore, India for providing facilities to conduct experiments and also support for the entire work.
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Suresh, R., Basavarajappa, S. & Gaitonde, V.N. Experimental studies on the performance of multilayer coated carbide tool in hard turning of high strength low alloy steel. Journal of Materials Research 30, 3056–3064 (2015). https://doi.org/10.1557/jmr.2015.236
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DOI: https://doi.org/10.1557/jmr.2015.236