METHOD OF PRODUCING CUBIC BORON NITRIDE SINTERED MATERIAL, CUBIC BORON NITRIDE SINTERED MATERIAL, AND CUTTING TOOL INCLUDING CUBIC BORON NITRIDE SINTERED MATERIAL

摘要

A method of producing a cubic boron nitride sintered material includes: forming an organic cubic boron nitride powder by attaching an organic substance onto a cubic boron nitride source material powder; preparing a powder mixture including more than or equal to 85 volume % and less than 100 volume % of the organic cubic boron nitride powder and a remainder of a binder source material powder by mixing the organic cubic boron nitride powder and the binder source material powder, the binder source material powder including WC, Co and Al; and obtaining the cubic boron nitride sintered material by sintering the powder mixture.