SURFACE COATING CUTTING TOOL WITH EXCELLENT DEFECT RESISTANCE AND ABRASION RESISTANCE

WIPO Patent Application WO/2012/176827

A1

Provided is a surface coating cutting tool with superior defect resistance and abrasion resistance. A surface coating cutting tool having a hard coating layer coated and formed on the surface of a tool substrate by means of a physical vapor deposition method, wherein the hard coating layer is formed of a compound carbonitride layer or a compound nitride layer with an average layer thickness of 0.5 to 8.0 μm expressed by the compositional formula (Al1-x-yTixSiy)(N1-zCz), the hard coating layer contains metallic particles with an average sectional major axis of 0.05 to 0.5 μm in which 90 at% or more of the constituent elements are metallic elements, the metallic particles are dispersed and distributed in the hard coating layer at a longitudinal section area ratio of 3 to 18 %, the constituent elements contain Al of 50 at% or more among the metallic particles, and when the longitudinal sectional area ratio of a particle satisfying conditions such as the aspect ratio of the longitudinal sectional shape being 2.0 or more and the acute angle formed between the sectional major axis and the substrate surface being 45° or less is taken as A%, and when the longitudinal sectional area ratio of another particle is taken as B%, 0.3≤A/(A+B).

SATO SHUN (JP)
SENBOKUYA KAZUAKI (JP)
TANAKA KOICHI (JP)
TANAKA YUSUKE (JP)

PCT/JP2012/065805

December 27, 2012

June 21, 2012

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MITSUBISHI MATERIALS CORP (JP)
SATO SHUN (JP)
SENBOKUYA KAZUAKI (JP)
TANAKA KOICHI (JP)
TANAKA YUSUKE (JP)

B23C5/16; B23B27/14; C23C14/06

WO2012102374A1

2012-08-02

JP2002346812A	2002-12-04
JP2007118126A	2007-05-17

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