Wear behavior of some cutting tool materials in hard turning of HSS |
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Authors: | MA El HakimMD Abad MM AbdelhameedMA Shalaby SC Veldhuis |
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Affiliation: | a Department of Design and Production, Faculty of Engineering, Ain Shams University, Cairo, Egypt b Department of Mechanical Engineering, McMaster University, Hamilton, Canada |
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Abstract: | This study presents an assessment of the performance of four cutting tool in the machining of medium hardened HSS: polycrystalline c-BN (c-BN+TiN), TiN coated polycrystalline c-BN (c-BN+TiN), ceramic mixed alumina (Al2O3+TiC), and coated tungsten carbide (TiN coated over a multilayer coating (TiC/TiCN/Al2O3)). The Al2O3+TiC and the coated carbide tools can outperform both types of c-BN at high cutting speeds. Raman and SEM mapping revealed an alumina tribo-layer that protects the surface of the Al2O3+TiC cutting tool. The high chemical and thermal stability of Al2O3 tribo-films protects the tool substrate because it prevents the heat generated at the tool/chip interface from entering the tool core. |
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Keywords: | Hard turning Cutting tool materials Tool wear Tribo-layer |
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