Cutting tool

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United States of America Patent

PATENT NO 9884790
SERIAL NO

14784104

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A cutting tool includes a base material and a coating formed on the base material. The base material is a sintered body containing 30 to 80% by volume of cubic boron nitride, and a binder. The surface in contact with the coating, of the base material, has a plurality of convex portions made of the cubic boron nitride and a plurality of concave portions made of the binder. A surface roughness Rsub of the surface in contact with the base material, is 0.1 to 0.4 μm. A surface roughness Rsurf of an outermost surface of the coating is 0 to 0.15 μm. A surface roughness Rasurf of the outermost surface of the coating is 0 to 0.1 μm. The surface roughness Rsub of the surface in contact with the coating, of the base material, is greater than the surface roughness Rsurf of the outermost surface of the coating.

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Patent Owner(s)

  • SUMITOMO ELECTRIC HARDMETAL CORP.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okamura, Katsumi Itami, JP 92 374
Setoyama, Makoto Itami, JP 43 560
Tsukihara, Nozomi Itami, JP 25 41

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