| 摘要 |
<p>A coated cutting tool member having a hard coating layer and exhibiting excellent life characteristics thanks to the hard coating later. The hard coating layer composed of a Ti-Y composite nitride layer is formed on a tungsten carbide-based cemented carbide base, a titanium carbonitride-based cermet base, or a cubic boron nitride-based sintered material base to a whole average layer thickness of 1 to 15 µm by physical vapor deposition. The hard coating layer has a component concentration distribution structure in which Y-component maximum content points (Ti-component minimum content points) and Y-component not-containing points (TiN points) are alternated along the layer thickness at predetermined intervals, and the Y-component content continuously varies from the Y-component maximum content point to the Y-component not-containing point and from the Y-component not-containing point to the Y-component maximum content point. The Y-component maximum content point satisfies a composition (Ti1-xYx)N (where x is 0.005 to 0.15 in atomic ratio), and the interval between adjacent Y-component maximum content point and Y-component not-containing point is 0.01 to 0.1 µm.</p> |
