Patent ID: 6623850
Filing Date: 2003-09-23
Classification: C04B,C23C,Y10T

Abstract:
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 a metallic 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 only one or more metallic elements selected from the Group 4a, 5a and 6a of Periodic Table and having a mean thickness of at least 0.005 &mgr;m to at most 0.05 &mgr;m.