CUBIC BORON NITRIDE SINTERED COMPACT

A cubic boron nitride sintered material comprises 30% by volume or more and 80% by volume or less of cubic boron nitride grains and 20% by volume or more and 70% by volume or less of a binder phase, the binder phase including: a simple substance, an alloy, an intermetallic compound consisting of one or more elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element of the periodic table, aluminum, silicon, iron, cobalt and nickel; or at least one selected from the group consisting of a compound consisting of at least one element selected from the group consisting of a group 4 element, a group 5 element and a group 6 element of the periodic table, aluminum, silicon, iron, cobalt and nickel and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and a solid solution derived from the compound, the cubic boron nitride grains having a dislocation density of 3 × 1017/m2 or more and 1 × 102°/m2 or less.