Polycrystalline diamond sintered material tool excellent in interfacial bonding strength and method of producing same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11193335
APP PUB NO 20180371846A1
SERIAL NO

15777115

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A polycrystalline diamond sintered material tool includes: a cemented carbide substrate, which is mainly composed of WC and includes Co; and a diamond layer containing a metal catalyst made of Co provided on the cemented carbide substrate. The average layer thickness of a Co rich layer formed in an interface between the cemented carbide substrate and the diamond layer is 30 μm or less. CMAX/CDIA is 2 or less when CDIA is an average content of Co included in the diamond layer and CMAX is a peak value of a Co content in the Co rich layer. D/DO is less than 2 when D is an average grain size of WC particles in a region from the interface between the cemented carbide substrate and the diamond layer to 50 μm toward an inside of the cemented carbide substrate; and DO is an average grain size of WC particles.

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Patent Owner(s)

  • MITSUBISHI MATERIALS CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akaishi, Minoru Tsukuba, JP 12 69
Akhmadi, Eko Wardoyo Naka-gun, JP 8 4
Matsuo, Toshihiko Naka-gun, JP 27 224

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