| 摘要 |
PROBLEM TO BE SOLVED: To provide a new coated cemented carbide member which is obtained by covering the surface of a cemented carbide with an amorphous carbon film, and has adhesion improved by forming the surface of the base material into a specified rugged face. SOLUTION: The coated cemented carbide member includes: the base material 10 made of a cemented carbide composed of a hard phase 12 containing tungsten carbide and a binder phase 11 containing iron group metal; and the amorphous carbon film 2 covered on the surface of the base material 10. The surface of the base material 10 covered with the amorphous carbon film 2 is a rugged face 10f having a recessed part 12<SP>-</SP>from which the hard phase 12 is lost, and when the average particle diameter of WC is defined as X[μm], the maximum depth of the recessed part as Y[μm] and the area ratio of the binder phase in the rugged face as Z[%], by controlling the values of X, Y and Z to prescribed ranges, an anchor effect improves the adhesion between the surface of the base material 10 and the amorphous carbon film 2. COPYRIGHT: (C)2010,JPO&INPIT
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