気相合成ダイヤモンド薄板による切削工具の試作及びその性能

概要

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As for application of a diamond film for a cutting tool, diamond coating cutting tool has been proposed ; however the coating cutting tool has the significant problem that the bonding force between the diamond film and the substrate is not sufficient and the diamond film peels off in the cutting. In this paper, the fabrication and the performance of a cutting tool using a thin diamond plate obtained by arc discharge plasma jet CVD has been described. Since the surface of the diamond plate prepared by the method is very rough with many grow-up crystals, the surface was planed and the cutting edge was shaped by YAG laser. Then a cutting tool was fabricated by brazing the diamond plate with tungsten carbide chip and evaluated in cutting Al-12%Si alloy. It is found that the chipping occurs at the gaps introduced at the grain boundaries which exist on the cutting edge according to the increase of cutting distance, but in the serial part of the crystal, any chipping, is not observed and good wear resistance is proved. This shows that the cutting tool with good crystallinity without gaps is able to apply to the cutting for Al-12%Si alloy.
公益社団法人精密工学会の論文
1992-05-05