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Title:
CERMET, METHOD FOR PRODUCING THE SAME, AND CUTTING TOOL
Document Type and Number:
Japanese Patent JP2013010997
Kind Code:
A
Abstract:

To provide a cermet that is excellent in wear resistance and chipping resistance and also is excellent in thermal shock resistance and welding resistance, and a method for producing the same.

The cermet is obtained by binding hard phases using a binder phase. The hard phases are classified into: a first hard phase 1 which only comprises Ti (C, N); a second hard phase 2 which comprises a solid solution of a composite carbonitride including at least titanium and tungsten; and a third hard phase 3 which comprises the same elements as the second hard phase and has higher tungsten concentration than the second hard phase. When in an optional cross-sectional surface which bisects the volume, area ratios of a first square area centering on the point of 150 μm deep and a second square area centering on the point of 5 μm deep are Sx and Sy respectively, Sy/Sx<0.75 is satisfied. Also in the optional cross-sectional surface above, there is no exposed layer of the binder phase which continues with a thickness of at least 1 μm and with a length of at least 1 μm in the width direction orthogonal to the thickness direction in the case surface.


Inventors:
MATSUDA KAZUOMI
HIROSE KAZUHIRO
Application Number:
JP2011144976A
Publication Date:
January 17, 2013
Filing Date:
June 29, 2011
Export Citation:
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Assignee:
SUMITOMO ELEC HARDMETAL CORP
International Classes:
C22C29/04; B22F3/10; B23B27/14; B23P15/28
Domestic Patent References:
JPH08174310A1996-07-09
JPH09111390A1997-04-28
JPH09239605A1997-09-16
JPH0293036A1990-04-03
JP2005350707A2005-12-22
JPS54101704A1979-08-10
JP2005213599A2005-08-11
JP2004115881A2004-04-15
Attorney, Agent or Firm:
Hiroshi Yamano