Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2006-12-19
2006-12-19
Turner, Archene (Department: 1775)
Stock material or miscellaneous articles
Composite
Of inorganic material
C051S307000, C051S309000, C428S216000, C428S336000, C428S697000, C428S699000, C407S119000
Reexamination Certificate
active
07150925
ABSTRACT:
The invention provides a coated cutting tool made of cemented carbide in which a hard coating layer has excellent wear resistance in high-speed cutting operation, wherein (a) a crystal orientation hysteresis layer which consists of a carbonitride compound layer and (b) a hard coating layer which consists of a layer of nitride compound and has a well defined crystal orientation and/or degree of crystallinity are formed on the surface of a cemented carbide substrate, preferably on the surface of a tungsten carbide based cemented carbide or titanium carbonitride based cermet by physical vapor deposition, wherein the crystal orientation hysteresis layer is deposited between the surface of a cemented carbide substrate and the hard coating layer. In one specific example, (a1) the carbonitride compound layer has an average thickness of 0.05 to 0.5 μm and is preferably a Ti—Al carbonitride compound layer expressed by the composition formula as (Ti1−XAlX)(N1−YCY), wherein X ranges from 0.05 to 0.20 and Y ranges from 0.01 to 0.15 by atomic ratio and (b1) the nitride compound layer has an average thickness of 2 to 15 μm and is preferably a Ti—Al nitride compound layer expressed by the composition formula as (Ti1−ZAlZ)N, wherein Z ranges from 0.45 to 0.65 by atomic ratio. In another specific example, (a2) the carbonitride compound layer has an average thickness of 0.05 to 0.5 μm and is preferably a Ti—Al carbonitride compound layer expressed by the composition formula as (Ti1−XAlX)(N1−YCY), wherein X ranges from 0.01 to 0.15 and Y ranges from 0.01 to 0.15 by atomic ratio and (b2) the nitride compound layer has an average thickness of 2 to 10 μm and is preferably a Al—Ti—Si nitride compound layer expressed by the composition formula as (Al1−(A+B)TiASiB)N, wherein A ranges from 0.35 to 0.55 and B ranges from 0.05 to 0.20 by atomic ratio.
REFERENCES:
patent: 5580653 (1996-12-01), Tanaka et al.
patent: 6071560 (2000-06-01), Braendle et al.
patent: 6274249 (2001-08-01), Braendle et al.
patent: 6395379 (2002-05-01), Braendle
patent: 63-89202 (1988-04-01), None
patent: 6-116731 (1994-04-01), None
patent: 7-310174 (1995-11-01), None
patent: 8-209336 (1996-08-01), None
patent: 9-170068 (1997-06-01), None
patent: 10-317123 (1998-12-01), None
patent: 10-330914 (1998-12-01), None
patent: 11-131216 (1999-05-01), None
patent: 11-310867 (1999-11-01), None
patent: 2001-234328 (2001-08-01), None
Kondo Akihiro
Nakamura Eiji
Sato Kazunori
Takaoka Hidemitsu
Tanaka Yusuke
Mitsubishi Materials Corporation
Mitsubishi Materials Kobe Tools Corporation
Turner Archene
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