Title:
COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2015/005364
Kind Code:
A1
Abstract:
Provided is a coated cutting tool which is suppressed in growth of a crack occurred in the coated cutting tool, thereby having excellent chipping resistance, excellent fracture resistance and a long service life.
A coated cutting tool which comprises a base and a coating layer that is formed on the surface of the base, and wherein the coating layer has an upper layer and a lower layer. The lower layer is formed on the surface of the base, and is configured of one or more layers of a compound that is formed of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Si and at least one element selected from the group consisting of C, N, B and O. The average value (X) of crack intervals in the lower layer is 10-80 μm. The upper layer is formed on the surface of the lower layer, and contains an aluminum oxide layer. The average value (Z) of crack intervals in the aluminum oxide layer is 20-100 μm, and X and Z satisfy the relational expression Z - X > 0.
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Inventors:
HIRANO YUSUKE (JP)
TAKAHASHI KINYA (JP)
TAKAHASHI KINYA (JP)
Application Number:
PCT/JP2014/068245
Publication Date:
January 15, 2015
Filing Date:
July 09, 2014
Export Citation:
Assignee:
TUNGALOY CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16
Domestic Patent References:
| WO2013042790A1 | 2013-03-28 |
Foreign References:
| JPH08158052A | 1996-06-18 |
Attorney, Agent or Firm:
TSUKUNI & ASSOCIATES et al. (JP)
Patent business corporation Tsukuni (JP)
Patent business corporation Tsukuni (JP)
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