SURFACE COATED SINTERED BODY - SUMITOMO ELEC HARDMETAL CORP

Title:

SURFACE COATED SINTERED BODY

Document Type and Number:

WIPO Patent Application WO/2012/070290

Kind Code:

A1

Abstract:

This surface coated sintered body comprises a cubic boron nitride sintered body and a surface coating layer that is formed on the surface of the cubic boron nitride sintered body. This surface coated sintered body is characterized in that: the cubic boron nitride sintered body contains 20-99.5% by volume of cubic boron nitride and a binder; the surface coating layer comprises an adhesion layer and one or more hard coating layers; the adhesion layer is a metal layer that contains at least W and is formed so as to cover at least a part of the surface of the cubic boron nitride sintered body; the hard coating layers are formed so as to cover the cubic boron nitride sintered body and the adhesion layer; and the ratio of cubic boron nitride particles in contact with the adhesion layer relative to the total number of cubic boron nitride particles in contact with the adhesion layer or the hard coating layers on the surface of the cubic boron nitride sintered body is 0.01-20%.

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Inventors:

SETOYAMA MAKOTO (JP)
OKAMURA KATSUMI (JP)
TSUKIHARA NOZOMI (JP)

Application Number:

PCT/JP2011/069546

Publication Date:

May 31, 2012

Filing Date:

August 30, 2011

Export Citation:

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Assignee:

SUMITOMO ELEC HARDMETAL CORP (JP)
SETOYAMA MAKOTO (JP)
OKAMURA KATSUMI (JP)
TSUKIHARA NOZOMI (JP)

International Classes:

B23B27/20; B23B27/14; C23C14/06

Foreign References:

JP2002144111A	2002-05-21
JP2005213637A	2005-08-11
JP2008024976A	2008-02-07
JPS63286575A	1988-11-24
JP2005047004A	2005-02-24
JP2002144110A	2002-05-21
JP2000129423A	2000-05-09

Other References: