(tasks), such as the cutting performance and wear resistance properties of the workpiece is to prevent melt-stick, press, stable and good as to provide the tool with a cutting tool and a holder having a hard coating which can exhibit. ; (solving means), the cutting tool (1) is, for example, JIS standard cemented carbide K10 equivalent of ( a substrate made of a hard material of WC-Co cemented carbide of the system), ISO standard geometry by machining and polishing of SPGN120312, the throwaway tip to form a hard coating on the surface. That is, the cutting tool (1) is, as the inclined upper side of Fig. 1 (main surface side) side of the large plate-shaped positive tip merchant, the substrate surface has a thickness in the range of TiAlN based 1~5 , for example, Ti / Al ratio = the first hard coating is formed. In particular, the coarse particles having a size greater than the thickness of the hard coating is present on the cutting tool is no more than 5% by area, and the hard film has a surface roughness (Ra) of less than 0.1 and also the surface roughness (R2) is 1 or less.
展开▼
