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Title:
EXCAVATION CHIP, EXCAVATION TOOL, AND METHOD FOR MANUFACTURING EXCAVATION CHIP
Document Type and Number:
WIPO Patent Application WO/2017/183659
Kind Code:
A1
Abstract:
This excavation chip has a chip body provided with a distal-end part which tapers off progressively toward the distal-end side thereof, a hard layer is formed on the surface of the distal-end part of the chip body, an outermost layer of the hard layer is a cBN sintered compact having cBN particles in a ratio of 70-95 vol%, the cross-sectional structure of the outermost layer is observed to have a width of 1 nm to 30 nm and to contain Al, B, and N, and a bonded phase in which the ratio of the O content to the Al content is 0.1 or less is present between adjacent cBN particles.

Inventors:
AKHMADI EKO Wardoyo (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
YANO Masahiro (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
MATSUO Toshihiko (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
AKAHOSHI Yuki (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
TAKEUCHI Yuichiro (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
Application Number:
JP2017/015749
Publication Date:
October 26, 2017
Filing Date:
April 19, 2017
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORPORATION (3-2 Otemachi 1-chome, Chiyoda-ku Tokyo, 17, 〒1008117, JP)
International Classes:
E21B10/46; B22F7/00; C04B35/58; C04B41/89; E21C35/183
Foreign References:
JP2002349173A2002-12-04
JPH02503454A1990-10-18
JPH0616476A1994-01-25
JP2011212832A2011-10-27
JP2004026555A2004-01-29
Attorney, Agent or Firm:
SHIGA Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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