Surface-coated cermet cutting tool with hard coating layer...

Details Surface-coated cermet cutting tool with hard coating layer... Surface-coated cermet cutting tool with hard coating layer...

2005-06-30

2008-03-25

Turner, Archene (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C051S307000, C051S309000, C428S336000, C428S698000, C428S699000

Reexamination Certificate

active

07348051

ABSTRACT:
A surface-coated cermet cutting tool with a hard coating layer is provided. The surface-coated cermet cutting tool is formed by coating, on a surface of a tool substrate, the hard-coating layer which includes an upper layer and a lower layer. The lower layer contains titanium compound layers and the upper layer contains an Al2O3layer. One layer of the titanium compound layers in the lower layer includes a TiCN layer which has an average layer thickness of 2.5 to 15 μm and indicates a tilt-angle frequency distribution graph in which the highest peak exists in a tilt angle section ranging 0 to 10° and the total sum of frequencies existing in the range of 0 to 10° occupies a ratio of 45% or more of the total frequencies in the tilt-angle frequency distribution graph.

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