CBN sintered body
AssigneeMitsubishi Materials Corporation
InventorMasahiro Yano
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Abstract
A cBN sintered compact comprises: cubic boron nitride grains and a binder phase, wherein 1) the binder phase comprises a Ti—Al alloy containing at least one element selected from the group consisting of Si, Mg, and Zn, and further comprises Ti2CN and TiB2; 2) the ratio ITi2CN/ITi-Al in XRD is 2.0 or more and 30.0 or less where ITi2CN represents the peak intensity of Ti2CN appearing at 2θ angle from 41.9° to 42.2° and ITi-Al represents the peak intensity of the Ti—Al alloy at 2θ angle from 39.0° to 39.3°; 3) areas where Ti and B elements overlap have an average aspect ratio of 1.7 or more and 6.5 or less and an area rate of 0.025% or more and 0.120% or less, in a mapping image of the Ti and B elements by Auger electron spectroscopy.
Claims1
A cBN sintered compact comprising:
- cubic boron nitride grains;
- and
- a binder phase, wherein
- 1) the binder phase comprises;
- a Ti—Al alloy,
- Ti2CN, and
- TiB2,
- the Ti—Al alloy containing at least one element selected from the group consisting of Si, Mg, and Zn,
- 2) a ratio ITi2CN/ITi—A1 in XRD is 2.0 or more and 30.0 or less, where ITi2CN represents the peak intensity of Ti2CN appearing at 2θ from 41.9° to 42.2° and ITi—Al represents the peak intensity of the Ti-Al alloy at 2θ angle from 39.0° to 39.3°, and
- 3) areas where Ti and B elements overlap have an average aspect ratio of 1.7 or more and 6.5 or less and an area rate of 0.025% or more and 0.120% or less, in a mapping image of the Ti and B elements by Auger electron spectroscopy.
Dependencies are inferred from the claim text.