Abstract
The aim of this investigation was to compare the performance of the following commercial coatings system, TiAlN/TiN, AlCrN, and TiSiN/AlCrN, deposited in cemented carbide tools in drilling compact graphite iron (CGI). The drilling tests were conducted adopting two cutting speeds: 80 or 150 m/min. For each test condition, the tool flank wear, the machining feed force, and the circularity and the roughness of the resulting drilled hole were determined. At the cutting speed of 80 m/min, the results revealed that the tool life, in terms of flank wear, was improved for the Cr-based coatings, while the multilayered coatings presented a better performance at the cutting speed of 150 m/min. It was also found that feed force is substantially increased when drilling at a cutting speed of 150 m/min. The holes drilled with the TiSiN/AlCrN at a cutting speed of 150 m/min showed the best circularity. The drill roughness is directly influenced by the coating system wear and iron adhesion. Consequently, it was found that the lowest holes’ roughness was obtained with TiSiN/AlCrN at 80 m/min.
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de Paiva, J.M.F., Amorim, F.L., Soares, P. et al. Evaluation of Hard Coating Performance in Drilling Compacted Graphite Iron (CGI). J. of Materi Eng and Perform 22, 3155–3160 (2013). https://doi.org/10.1007/s11665-013-0601-4
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DOI: https://doi.org/10.1007/s11665-013-0601-4