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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9884790 B1

PDFFull Text
Date of Patent:
Feb. 06, 2018

Filed:

Nov. 25, 2014

Cutting tool

Applicant:

Sumitomo Electric Hardmetal Corp., Itami-shi, JP;

Inventors:

Nozomi Tsukihara, Itami, JP;

Makoto Setoyama, Itami, JP;

Katsumi Okamura, Itami, JP;

Assignee:

Sumitomo Electric Hardmetal Corp., Itami-shi, JP;

Attorneys:

Venable LLP

Michael A. Sartori

Miguel A. Lopez

Primary Examiner:

Archene Turner

Int. Cl.
CPC ...
C04B 41/87 (2006.01); C04B 35/5831 (2006.01); C04B 41/52 (2006.01); C23C 30/00 (2006.01); C04B 35/58 (2006.01); C04B 35/581 (2006.01); C04B 35/645 (2006.01); C04B 41/89 (2006.01); C04B 41/00 (2006.01); C04B 41/50 (2006.01); C01B 21/064 (2006.01);
U.S. Cl.
CPC ...
C04B 41/87 (2013.01); C01B 21/0648 (2013.01); C04B 35/581 (2013.01); C04B 35/58014 (2013.01); C04B 35/5831 (2013.01); C04B 35/645 (2013.01); C04B 41/009 (2013.01); C04B 41/5062 (2013.01); C04B 41/5068 (2013.01); C04B 41/52 (2013.01); C04B 41/89 (2013.01); C23C 30/005 (2013.01); C01P 2004/61 (2013.01); C04B 2235/386 (2013.01); C04B 2235/3856 (2013.01); C04B 2235/3865 (2013.01); C04B 2235/3886 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01);
Abstract

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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