Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2004-12-02
2008-08-12
Turner, Archene (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
C051S307000, C051S309000, C428S216000, C428S472000, C428S697000, C428S699000
Reexamination Certificate
active
07410707
ABSTRACT:
The present invention provides a surface-coated cutting tool comprising a coating film on a base, while the coating film comprises a hard layer constituted of a compound selected from a nitride, a carbonitride, an oxynitride and a carboxynitride of at least one primary element selected from a group consisting of the metals belonging to the groups 4a, 5a and 6a of the periodic table as well as B, Al and Si, and the hard layer satisfies the following: (a) (hmax−hf)/hmax is at least 0.2 and not more than 0.7, assuming that hmax represents the maximum indentation depth and hf represents the indentation depth (dent depth) after unloading in a hardness test according to nanoindentation, (b) the thickness of the hard layer is at least 0.5 μm and not more than 15 μm, and (c) the hardness according to nanoindentation is at least 20 GPa and not more than 80 GPa.
REFERENCES:
patent: 4842710 (1989-06-01), Freller et al.
patent: 5580653 (1996-12-01), Tanaka et al.
patent: 5981049 (1999-11-01), Ohara et al.
patent: 6296928 (2001-10-01), Yamada et al.
patent: 6586122 (2003-07-01), Ishikawa et al.
patent: 6767658 (2004-07-01), Yamamoto et al.
patent: 6824601 (2004-11-01), Yamamoto et al.
patent: 7166155 (2007-01-01), Ishikawa
patent: 2003/0148145 (2003-08-01), Yamamoto et al.
patent: 2004/0137281 (2004-07-01), Ishikawa
patent: 08-120445 (1994-10-01), None
patent: 07-310174 (1995-11-01), None
patent: 09-295204 (1997-11-01), None
patent: 11-131216 (1999-05-01), None
patent: 2000-087217 (2000-03-01), None
patent: 2000-297365 (2000-10-01), None
patent: 2000-326108 (2000-11-01), None
patent: 2001-349815 (2001-12-01), None
patent: 2002-337007 (2002-11-01), None
patent: 2003-034859 (2003-02-01), None
patent: 2004-169076 (2004-06-01), None
patent: 2004-176085 (2004-06-01), None
patent: 2004-306228 (2004-11-01), None
S. Veprek et al., “Recent progress in the superhard nanocrystalline composites: towards their industrialization and understanding of the origin of the superhardness1”, Surface and Coatings Technology 108-109 (1998) 138-147; Elsevier Science S.A.
S. Sasaki; “Evaluation of Mechanical Properties of Tribo-Surface with Nano-Indentation Method”; “Tribologist”, vol. 47, No. 3 (2002), pp. 177 to 183, with English translation of the section headings.
Fukui Haruyo
Omori Naoya
Fasse W. F.
Fasse W. G.
Sumitomo Electric Hardmetal Corp.
Turner Archene
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