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Abstract

A cBN sintered body including cBN and a binder phase, wherein a content ratio of the cBN is 80 to 94 volume %, a content ratio of the binder phase is 6 to 20 volume %, the binder phase contains a metal phase, a V compound, and an Al compound, the metal phase contains one or more selected from the group consisting of Ni, and a Ni-containing alloy and solid solution, the Ni-containing alloy and solid solution each contain Ni and one or more elements selected from the group consisting of Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, and Co, the V compound contains one or more selected from the group consisting of VN, VCN, and VC, the Al compound contains one or more selected from the group consisting of Al₂O₃, AlN, and AlB₂, a maximum peak position 2θ of a 200 plane of the metal phase is less than 51.60°, and I₁/(I₁+I₂) is 0.40 to 0.80, where I₁ denotes an X-ray diffraction peak intensity of a 220 plane of the V compound, and I₂ denotes an X-ray diffraction peak intensity of a 200 plane of the metal phase.

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