Title:
切削工具
Document Type and Number:
Japanese Patent JP5879664
Kind Code:
B2
Abstract:
A cutting tool according to this invention is a cutting tool including 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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Inventors:
Tsukihara Nozomi
Makoto Setoyama
Katsumi Okamura
Makoto Setoyama
Katsumi Okamura
Application Number:
JP2013269437A
Publication Date:
March 08, 2016
Filing Date:
December 26, 2013
Export Citation:
Assignee:
Sumitomo Electric Hardmetal Corp.
International Classes:
B23B27/14; B23B51/00; B23C5/16; B23D77/00; B23G5/06
Domestic Patent References:
| JP64016302A | ||||
| JP2001220268A |
Foreign References:
| WO2007049785A1 | ||||
| WO2012144574A1 |
Attorney, Agent or Firm:
Fukami patent office