鉄複硼化物系サーメットの銅とのすべり摩耗特性

概要

論文の詳細を見る
In this investigation, the friction and sliding wear characteristics of new Mo2FeB2 complex boride base cermets against copper were studied, compared with a tool steel and cemented carbides. Two types of wear tests were carried out under lubricated and unlubricated conditions. The main results obtained are as follows; (1) Under a fluid lubricated condition, lapped surfaces of all materials do not show any significant frictional coefficient difference. In all tested sliding velocity from 0.06 to 1.2m/s, the frictional coefficient of all materials increases with increasing surface roughness. With increasing sliding velocity, the frictional coefficient of the tool steel drastically increases. On the other hand, that of the boride base cermet and the cemented carbide decreases after showing a maximum at 0.3m/s. (2) Under a mild friction without lubrication, as same as the cemented carbide, the boride base cermet has a little higher frictional coefficient, but shows much lower wear volume than the tool steel. (3) Under a severe friction without lubrication, the wear of the boride base cermets is less than that of the tool steel and the cemented carbide. Concerning the wear resistance against pure copper under these conditions, the boride base cermet is superior to the cemented carbide.