SURFACE COATING CEMENTED CARBIDE MADE CUTTING TOOL HAVING CUTTING BLADE SURFACE WITH SMALL FRICTIONAL RESISTANCE AGAINST CHIP

摘要

PROBLEM TO BE SOLVED: To provide a surface coating cemented carbide tool having a cutting blade surface frictional resistance against chips of which is small.;SOLUTION: Oxygen in heating decomposition reaction gas of a hydrogen group or a hydrogen-argon group diffuses an intrudes without being materially reacted with a Ti compound layer of a hard coating layer and a diffusion- intruded oxygen included band average content of the diffusing-intruded oxygen on the top surface of which is 1-25 atom % in measurement by an Auger spectral analysis device is formed along at average depth equivalent to average layer thickness of 5-20% of the hard coating layer constituting a coating cemented carbide tool from the top surface on at least a cutting blade surface of the coating cemented carbide tool made by chemically evaporating and/or physically evaporating the Ti compound layer made of one layer or a multiple layer of at least two layers out of a TiC layer, a TiN layer and a TiCN layer as a hard coating layer at average layer thickness of 0.5-15 μm on a surface of a cemented carbide base body.;COPYRIGHT: (C)2001,JPO