| 摘要 |
PROBLEM TO BE SOLVED: To provide a diamond-coated cutting tool which has low cutting resistance and excellent abrasion resistance in cutting a hard-to-cut material. SOLUTION: The diamond-coated cutting tool has a diamond coating of diamond crystal grains wherein peaks of a particle size distribution are observed at a position of an average particle diameter of 0.05-0.5μm and at a position of the average particle diameter of 0.8-5μm when the particle size distribution of diamond crystal grains is observed in a plane vertical to a film thickness direction of the diamond coating, in addition an area ratio of grains with the average particle diameter of 0.05-0.5μm occupies 20-40% of the entire area, and an area ratio of grains with the average particle diameter of 0.8-5μm occupies 40-80% of the entire area. Thus, smoothness of the coating is improved, and also the abrasion resistance is improved concurrently. COPYRIGHT: (C)2011,JPO&INPIT
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