Performance evaluation of AIP-TiAlN coated tool for high speed machining

Ti0.67Al0.33N single-layered and Ti0.52Al0.48N/TiN double-layered coatings were applied to end-mill tools made of WC–Co material by an arc ion plating technique. Their performances under high speed cutting conditions were evaluated about cutting force, tool wear, and surface roughness of workpiece. With Ti–Al–N coatings, tool life and performance were much increased under high speed machining. The Ti0.67Al0.33N single-layer coated tool showed higher wear-resistance due to its higher hardness, while the Ti0.52Al0.48N/TiN double-layer coated tool showed better performance for high metal removal, i.e., high feed per tooth condition due to its higher toughness. The surface roughness of the workpiece was not influenced by the wear of coated tools. It was, however, increased as the experimental conditions became severe, i.e., with increases of cutting speed and feed per tooth. An integrated evaluation system for cutting tools was introduced in this work.