SURFACE-COATED CEMENTED CARBIDE CUTTING TOOL HAVING LUBRICATING AMORPHOUS CARBON-BASED COATING FILM EXHIBITING SUPERIOR ABRASION RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide a surface-coated cemented carbide cutting tool having a lubricating amorphous carbon-based coating film exhibiting superior abrasion resistance.;SOLUTION: This surface-coated cemented carbide cutting tool is formed by depositing the lubricating amorphous carbon-based coating film composed of any one or both of an Si carbide layer and an Si nitride layer formed as a film in a magnetic field in a reaction atmosphere composed of mixed gas of nitrogen and Ar or mixed gas of cracked gas of hydrocarbon and Ar by using an Si target as a cathode electrode (an evaporation source) by a magnetron sputtering device, including W: 5 to 20 atomic% and Si: 5 to 20 atomic% by measuring by an Auger spectroscopic analysis device via a close contact joining layer having the average layer thickness of 0.1 to 3 μm, indicating a structure of dispersing and distributing crystalline Si carbide particulates on a basis material of a carbonaceous amorphous body by an observation by a transmission type electron microscope and having the average layer thickness of 1 to 13 μm, on a surface of a cemented carbide base body composed of tungsten carbide group cemented carbide or titanium carbonitride-based cermet.;COPYRIGHT: (C)2007,JPO&INPIT