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Title:
SURFACE-COATED BORON NITRIDE SINTERED COMPACT TOOL
Document Type and Number:
WIPO Patent Application WO/2015/163059
Kind Code:
A1
Abstract:
　In a surface-coated boron nitride sintered compact tool according to the present invention, at least a cutting blade portion includes a compound sintered compact and a coating layer provided on a surface of the compound sintered compact. The compound sintered compact includes cubic boron nitride particles and binder particles. The compound sintered compact includes the cubic boron nitride particles in a ratio of 45 vol% to 80 vol%. A first particle size distribution curve of the cubic boron nitride particles has one or more peaks in the particle diameter range of 0.1 µm to 0.7 µm. A second particle size distribution curve of the cubic boron nitride particles has a first peak having a maximum peak height in the particle diameter range of 2.0 µm to 7.0 µm. In the second particle size distribution curve, the integral value ratio (Io/It × 100) is 1 to 20, where Io represents the integral value in the particle diameter range of 0.1 µm to 0.7 µm, and It represents the integral value for the entire range.

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Inventors:
MATSUDA YUSUKE (JP)
OKAMURA KATSUMI (JP)
SANO KENTA (JP)
TSUKIHARA NOZOMI (JP)
SETOYAMA MAKOTO (JP)
Application Number:
PCT/JP2015/058475
Publication Date:
October 29, 2015
Filing Date:
March 20, 2015
Export Citation:
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Assignee:
SUMITOMO ELEC HARDMETAL CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; C04B35/626
Domestic Patent References:
WO2014034923A12014-03-06
WO2012005275A12012-01-12
Foreign References:
JP2000247746A2000-09-12
JPS63145726A1988-06-17
JP2008528413A2008-07-31
Other References:
See also references of EP 3000547A4
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
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