Performance Evaluation of Carbide Tool Coated with TiCN/Al2O3/TiN in Turning Alloy Steel Under Eco-Machining Technique
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The test results show tool life of multilayer ceramic (TiCN/Al2O3/TiN) CVD-coated carbide tool when using in high speed turning of AISI O1 steel with 240 HV under eco-machining technique is majority determined by the maximum flank wear on zone C and excessive chipping on tool nose region. The results are due to the geometry of cutting tool, mechanical and thermal wears. The use of oil-based cutting fluid in wet gives longer tool life and better surface roughness, Ra, than dry cutting (the eco-machining technique). This result is due to the presence of cutting fluid in supporting the advantages of coating materials. When tool rejection criteria are attained, higher surface roughness under wet cutting is resulted. The rough surface and abused feed marks are observed. They occur since excessive chipping on wet is worse than dry cutting due to the occurrence of thermal shock on the substrate (WC-Co).