Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Reexamination Certificate
2006-12-26
2006-12-26
Turner, Archene (Department: 1775)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
C051S307000, C051S309000, C428S336000, C428S628000, C428S701000, C428S702000
Reexamination Certificate
active
07153562
ABSTRACT:
The present invention relates to a cutting tool insert particularly for turning of steel comprising a cemented carbide body, a coating with a post treatment witha first, innermost layer system of one or several layers of TiCxNyOzwith x+y+z≦1 with a total thickness of 0.7–4.5 μma second multilayer system consisting of a totally 5–31 alternating Al2O3and TiCxNyOz(x+y+z≦1), preferably κ-Al2O3and TiN, the Al2O3-layers having an individual layer thickness of <0.5 μm and the TiCxNyOz-layers 0.01–0.2 μm with a total thickness of the multilayer of 1.0–4.0 μm. The multilayer is exposed along the edge line and into the rake and flank face, at least 0.02 mm, from the edge line on the rake face, preferably the contact length of the chip at most 0.9 mm, and 0.02–0.20 mm on the flank face.
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K. Dreyer et al., “Development and tool like behaviour of super-wear-resistant multilayer coatings on hardmetals,” pp. 112-117.
S. Ruppl et al., “Microstructure and deposition characteristics of κ-Al2O3,”J. Phys. IV France9 (1999), pp. 349-355.
Andersson Gunilla
Jonsson Anders
Lagerquist Mikael
Lindholm Mikael
Nordgren Anders
Drinker Biddle & Reath LLP
Sandvik Intellectual Property AB
Turner Archene
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