| 摘要 |
PROBLEM TO BE SOLVED: To provide a segmented structure of a stable and sharp diamond blade without shortening its service life, in solving the problems of the initial sharpness and the grain replacement of a diamond blade product. SOLUTION: Grains approximately equal in diameter to diamond abrasives and having a Knoop hardness of 2500 Kg/mm2 or less at room temperature, made from a material with a melting point higher than a temperature for baking segment chips 2 mounted to the outer periphery of a disc-shaped stock 1, are buried in a cutting surface on the outer periphery of each diamond chip 2 up to a depth that is 1 to 3 times the grain diameter, as measured from the surface of the cutting surface. The ratio of the number of diamond abrasives to that of grains buried is from 2:1 to 1:4. The grains buried are geometrically arranged in this ratio on the outer peripheral surface of each segment chip.
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