Title:
立方晶窒化ほう素基焼結体および切削工具
Document Type and Number:
Japanese Patent JP7161670
Kind Code:
B2
Abstract:
To provide a cBN-based sintered body having excellent crack propagation resistance and toughness as well as rigidity, hardness, and heat resistance, and a cutting tool comprising this sintered body.SOLUTION: The invention provides a cBN-based sintered body having excellent crack propagation resistance and a cutting tool comprising this sintered body. In the cBN-based sintered body, its binder phase involves Ti compound grains (preferably, having an average grain size of 150 nm or over and 500 nm or under), and has a binder phase texture where Ti compound grains including Al compound grains, among the Ti compound grains, exist. Preferably, a volume ratio of the Ti compound grains including the Al compound grains to the binder phase of the cBN sintered body is 5 vol.% or over and 60 vol.% or under, and a volume ratio of the Al compound grains included in the Ti compound grains to the Ti compound grains including the Al compound grains is 3 vol.% or over and 15 vol.% or under.SELECTED DRAWING: Figure 2
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Inventors:
Shiro Oguchi
Yousuke Miyashita
Yano Masahiro
Yousuke Miyashita
Yano Masahiro
Application Number:
JP2018191291A
Publication Date:
October 27, 2022
Filing Date:
October 09, 2018
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C04B35/5831; B23B27/14; B23B27/20
Domestic Patent References:
| JP2015193072A | ||||
| JP2017030082A | ||||
| JP2017014084A | ||||
| JP2018145020A | ||||
| JP3215363A |
Foreign References:
| WO2017204152A1 |
Attorney, Agent or Firm:
Shuichi Kageyama
Yasuyuki Kurachi
Yasushi Yamada
Koichi Kimura
Yasuyuki Kurachi
Yasushi Yamada
Koichi Kimura
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