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Drilling tip, drilling tool, and method of manufacturing drilling tip
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.
Drilling tip, drilling tool, and method of manufacturing drilling tip
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.
Drilling tip, drilling tool, and method of manufacturing drilling tip
YANO MASAHIRO (author) / AKHMADI EKO WARDOYO (author) / MATSUO TOSHIHIKO (author) / AKAHOSHI YUKI (author) / TAKEUCHI YUICHIRO (author)
2021-12-23
Patent
Electronic Resource
English
Drilling tip, drilling tool, and method of manufacturing drilling tip
| European Patent Office | 2021
DRILLING TIP, DRILLING TOOL, AND METHOD OF MANUFACTURING DRILLING TIP
| European Patent Office | 2023