| 摘要 |
The object of the present invention is to provide a cutting tool consisting of a suface-coated high pressure phase type boron nitride sintered compact, having a markedly improved adhesive strength of a hard coated layer to a cBN sintered compact substrate. The feature consists in a surface-coated boron nitride sintered compact tool, in which at least a part of the tool edge related with cutting is based on a substrate of a high pressure phase type boron nitride, and a surface-coated layer is allowed to be present on the surface thereof, the said surface-coated layer comprising an intermediate layer present in continuous manner to the interface of the said high pressure phase boron nitride sintered compact substrate and a hard coated layer formed further thereon, the said intermediate layer consisting of at least one element selected from the Group 4a, 5a and 6a of Periodic Table having a mean thickness of 0.005 to 0.05 mu m. <IMAGE> |
