Title:
HARD COATING FILM AND TOOL COATED WITH HARD COATING FILM
Document Type and Number:
WIPO Patent Application WO/2010/150411
Kind Code:
A1
Abstract:
A hard coating film (20) formed on the cutting part (14) of a ball end mill (10) is provided which includes: a second layer (24) which is constituted of AlCrN or AlCrDN and imparts excellent wearing resistance; and a third layer (26) which is constituted of a nitride, carbonitride, or carbide of one or more metallic elements selected from B, Al, Ti, Y, Zr, Hf, V, Nb, Ta, Cr, and W and imparts high adhesion strength. The coating film (20) further includes a first layer (22), which is a layer obtained by alternately superposing a layer Ia (22a) and a layer Ib (22b) to form one or more cycles so that the outermost layer is a layer Ia (22a). The layer Ib (22b) is constituted of (Cr1-a-bBaXb)(CcOdN1-c-d) and hence has a reduced coefficient of friction to impart excellent unsusceptibility to deposition. The layer Ia (22a) is constituted of AlCrN or AlCrαN and, hence, improves heat resistance. Even when the mill (1) is used under such processing conditions that the coating film (20) heats up to a high temperature as in high-speed cutting or the like, excellent wearing resistance is obtained while maintaining the unsusceptibility to deposition brought about by the layer Ib (22b).
Inventors:
SUGITA HIROAKI (JP)
TOIHARA TAKAOMI (JP)
SUZUKI TAKAMASA (JP)
TOIHARA TAKAOMI (JP)
SUZUKI TAKAMASA (JP)
Application Number:
PCT/JP2009/061785
Publication Date:
December 29, 2010
Filing Date:
June 26, 2009
Export Citation:
Assignee:
OSG CORP (JP)
SUGITA HIROAKI (JP)
TOIHARA TAKAOMI (JP)
SUZUKI TAKAMASA (JP)
SUGITA HIROAKI (JP)
TOIHARA TAKAOMI (JP)
SUZUKI TAKAMASA (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; C23C14/06
Foreign References:
| JP2008302473A | 2008-12-18 | |||
| JP2009056549A | 2009-03-19 |
Attorney, Agent or Firm:
IKEDA HARUYUKI (JP)
Haruyuki Ikeda (JP)
Haruyuki Ikeda (JP)
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