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METHOD FOR MACHINING MATERIAL TO BE MACHINED, MACHINE TOOL, AND METHOD FOR MANUFACTURING MEMBER, BY USING DIAMOND TOOL EQUIPPED WITH NANO POLYCRYSTALLINE DIAMOND OR VAPOR-PHASE SYNTHESIZED MONOCRYSTAL DIAMOND
METHOD FOR MACHINING MATERIAL TO BE MACHINED, MACHINE TOOL, AND METHOD FOR MANUFACTURING MEMBER, BY USING DIAMOND TOOL EQUIPPED WITH NANO POLYCRYSTALLINE DIAMOND OR VAPOR-PHASE SYNTHESIZED MONOCRYSTAL DIAMOND
Provided is a method for machining a material to be machined, by using a diamond tool equipped with a nano polycrystalline diamond or a vapor-phase synthesized monocrystal diamond, wherein: the nano polycrystalline diamond contains 10-1000 ppm of nitrogen atoms, whereas the vapor-phase synthesized monocrystal diamond contains 1-100 ppm of nitrogen atoms; during machining of the material to be machined, the temperature of the diamond tool is 400°C or less at the contact point between the material and the diamond tool; and a spatial region within 3 cm of the contact point has an oxygen concentration of 20% or less.
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