Al-Si鋳造合金切削におけるダイヤモンド焼結工具の工具磨耗について

概要

論文の詳細を見る
Carbide tools of P10 and K10, a CBN tool and two kind of sintered diamond powder tool (hereinafter referred to as DC tool) were used to dry-cut copper silumin (AC4B-T6) and two kinds of hypersilumin (Al-17%Si-T6 and Al-23%Si-F), and their wear was observed. Furthermore the detail of wear mechanism of DC tool, which showed the highest wear resistance among the tools used, was examined by EPMA. The following results were obtained. The wear of DC tool was small in comparison with carbide tools and CBN tool in any cutting condition. At low cutting speed, the wear of DC tool was extremely small because it is caused only by the adhesive wear process of silicon grains. At high cutting speed, however, it is caused by the following two processes: One is the falling-off of diamond grains which is attributable to the decrease in its binding force, resulting from the bonding of the work material with cobalt binder during cutting. The other is the same as that discribed above for the case of low cutting speed. DC tool which has the small diamond grain size and the narrow distribution of grain size showed greater wear resistance.
社団法人日本材料学会の論文
1984-07-15