Coated cemented carbide cutting tool

摘要

A coated cemented carbide cutting tool member having excellent ability to prevent breakage and chipping around its cutting edge, exhibits high wear resistance in severe cutting operations comprises a hard sintered substrate and a hard coating layer deposited on the surface of said substrate, the hard coating layer comprises an alternated multi-layer structure having a total thickness of between 0.5 to 20 mu m and comprising the first thin layer of titanium compounds and the second thin layer of hard oxide materials whose individual thickness is between 0.01 to 0.3 mu m.