HIGH-STRENGTH, HIGH-ABRASION-RESISTANT DIAMOND SINTERED PRODUCT AND TOOL THEREFROM

摘要

PROBLEM TO BE SOLVED: To provide a diamond sintered product that has excellent abrasion resistance, chipping resistance, shock resistance and high thermal conductivity. SOLUTION: This diamond sintered product contains sintered diamond particles and a rest amount of sintering additives. The content of the sintered diamond particles is 80-99 vol.%. The sizes of the sintered diamond particles are in the range of from 0.1 μm to 70 μm. Adjacent sintered diamond particles directly joint to each other. The sintering additives include at least one selected from the group consisting of tungsten, iron, cobalt and nickel. The proportion of the tungsten in the sintered product is in the range of from 0.01 to 8 wt.%.