Coated cutting tool

Details Coated cutting tool Coated cutting tool

2011-07-05

2011-07-05

Turner, Archene (Department: 1784)

Stock material or miscellaneous articles

Composite

Of inorganic material

C051S307000, C051S309000, C428S216000, C428S325000, C428S336000, C428S697000, C428S698000, C428S702000

Reexamination Certificate

active

07972714

ABSTRACT:
The present invention relates to a coated cutting tool (1) including a substrate (8) and a coating (9) formed on the substrate (8), wherein the coating (9) includes a first coating (10) composed of TiCN and a second coating (11) composed of α-Al2O3, the first coating (10) is positioned between the substrate (8) and the second coating (11) and has tensile stress S1, the second coating (11) has compressive stress S2, and the tensile stress S1and the compressive stress S2are defined by the following equation (I):in-line-formulae description="In-line Formulae" end="lead"?400 MPa≦|S2−S1|≦3500 MPa  (I).in-line-formulae description="In-line Formulae" end="tail"?

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European Office Action for corresponding EP Application No. 05814749.7, Aug. 18, 2009, UK.

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