Abstract
The cutting performance of coated carbide tools in hardmilling is investigated. Four kinds of coating films: TiN, TiCN, TiAlN and multi-layered TiAlN/AlCrN: are coated on two types of carbide materials: JIS K20 and P30. The tool flank wear VB depends considerably on the hardness and oxidizing temperature of coating film. In the case of TiN, TiCN and TiAlN, the tool flank temperature θα rises with cutting, but it does not increase in TiAlN/AlCrN. When the base material is K20, θα is lower than that of P30 because of high thermal conductivity. The tool temperature and tool wear has great influence on the surface roughness of workpiece.
