非金属介在物を利用した片状黒鉛鋳鉄高速切削時の快削化 : 高速旋削加工時におけるサーメット工具への摩耗抑制効果

概要

論文の詳細を見る
This study aims to improve the machinability of a gray cast iron using nonmetallic inclusions in the work material in high-speed cutting. In this research, small quantities of Al and Mg were added to conventional gray cast irons without influencing these mechanical characteristics and castability to investigate the effects of those nonmetallic inclusions in gray cast irons on tool wear of a cermet tool in high-speed cutting. When high speed turning of Al added gray cast iron, a protective layers consisting of Al, Si, Mn, S and O were detected on flank face and rake face of the tool, and flank and crater wear were significantly reduced compared to turning of conventional gray cast iron. Furthermore, in turning of Al and Mg added gray cast iron, layers consisting of Al, Mg, Si, Mn, S and O were observed on flank face and rake face of the tool, and flank and crater wear were reduced drastically even compare to cutting the Al added gray cast iron. The effect of inclusions on tool wears increased with the increase of cutting speed, and the smallest flank and crater wears were observed at cutting speed of 700m/min.
2005-06-05