| 摘要 |
PROBLEM TO BE SOLVED: To provide a new coated cemented carbide member which has improved adhesion between a base material made of a cemented carbide and a hard film by forming the surface of the base material into a predetermined 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 transition metal; and the hard film 2 covered on the surface of the base material 10. The surface of the base material 10 covered with the hard 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 12<SP>-</SP>as Y[μm], and the area ratio of the binder phase 11 in the rugged face 10f 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 hard film 2. COPYRIGHT: (C)2011,JPO&INPIT |
