Title:
Cutting tool
Document Type and Number:
Japanese Patent JP5927685
Kind Code:
B2
Abstract:
A cutting tool (1) having excellent chip treatability and adhesion resistance is provided. The cutting tool (1) includes a hard sintered body (4) in at least a cutting edge and has a rake face (2) and a flank face (3). The rake face (2) has a chip breaker (5) in a protruded or uneven shape. The hard sintered body contains at least 20% by volume of cubic boron nitride. A region of not more than 20 µm from a surface of the hard sintered body (4) on the rake face side includes A-structures made of cubic boron nitride and B-structures made of at least one selected from the group consisting of hexagonal boron nitride, amorphous boron nitride, and boron oxide. The volume ratio of the B-structures to the sum of the A-structures and B-structures, B/(A+B), is not less than 5% by volume and not more than 90% by volume.
Inventors:
Makoto Setoyama
Akatsuki Kukino
Akatsuki Kukino
Application Number:
JP2015042536A
Publication Date:
June 01, 2016
Filing Date:
March 04, 2015
Export Citation:
Assignee:
Sumitomo Electric Hardmetal Corp.
International Classes:
B23B27/14; B23B27/20; B23B51/00; B23C5/16; B23D77/00; B23G5/06
Domestic Patent References:
| JP2006281386A | ||||
| JP2010228088A | ||||
| JP2010524699A | ||||
| JP2004223648A | ||||
| JP5765658B2 |
Foreign References:
| US5948541 |
Attorney, Agent or Firm:
Fukami patent office
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