Method of producing fine free carbon dispersion type cemented carbide and coated cemented carbide

摘要

To provide a method of manufacturing a cemented carbide, a coated cemented carbide and a cemented carbide containing free carbon, even if a cemented carbide containing free carbon is used to eliminate or reduce the disadvantage of free carbon , Specifically, even if free cemented carbide is contained in the cemented carbide, it is possible to suppress the decrease in strength by finely dispersing the free carbon, and finely dispersing the free carbon in the cemented carbide to obtain a mirror surface It is also an object of the present invention to provide a cemented carbide and a method of manufacturing a cemented carbide capable of obtaining a clean mirror surface even on a finished surface.SOLUTION: A cemented carbide composed of tungsten carbide (WC) and cobalt (C) containing carbon in a range not containing solid carbon in its liquid phase when present in a liquid phase at a high temperature, which is attributable to free carbon The maximum diameter of the nest is 20 um or less.BACKGROUND OF THE INVENTION