PVD-coated cutting tool insert

Details PVD-coated cutting tool insert PVD-coated cutting tool insert

2005-09-09

2010-11-23

Turner, Archene (Department: 1784)

Stock material or miscellaneous articles

Composite

Of inorganic material

C051S307000, C051S309000, C204S192100, C204S192150, C204S192160, C428S336000, C428S698000, C428S699000

Reexamination Certificate

active

07838132

ABSTRACT:
The present invention relates to a coated cutting tool insert of cemented carbide with coating including at least one layer of Ti1-xAlxN deposited by PVD-technique. The layer has x=0.4-0.6 with a compressive residual stress of >4-6 GPa and a thickness of 1.5-5, preferably 2.5-4 μm. Both the I(111) and I(200) are <7.5, preferably <5, times, the intensity average noise level. Good adhesion despite high compressive stress is obtained if the layer is deposited by cathodic arc evaporation technique at a bias in the range −90<U<−50V, preferably −80V<U<−60V.

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Weber et al “Cathodic arc evaporation of (Ti,Al)N coatings and (Ti,Al)N/TiN multilayered coatings- correlation between lifetime of coated cutting tools, structural and mechanical film properties” Surf. and Coat. Tech 177-178 (2004) 227-232.
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