鉄複ほう化物系サーメットの合金鋼を相手にしたすべり摩耗特性

Abstract

A ring on block type Ogoshi wear test was conducted in air to study the dry sliding wear behavior of both Mo2FeB2 base cermets against various alloy steels and the mating materials (alloy steels) compared with those of cemented carbides.The main results obtained were as follows:(1) Both the boride cermets and cemented carbides against, SUJ2 and SKH3 were less worn than SKD11 and SUS440C. The boride cermets yielded less wear of all tested mating materials than cemented carbides.(2) The wear behavior of the boride cermets against SKD11 and SUS440C showed the non-adhesive wear (oxidative wear) up to the sliding velocity of 0.94 m/s, thereafter it changed to the adhesive wear.(3) The wear behavior of the cemented carbides against SKD11 and SUS440C showed the non-adhisive waer at the velocity of 0.62 m/s and the severe wear above the velocity of 0.94 m/s, where the wear rate of not only mating materials but also the cemented carbides drastically increased.(4) Against SKD11 and SUS400C an increase of the wear rate of both the cermets in adhesive range was thought to be attributed to the self mated wear caused by the adhesion of the mating materials to the counterspecimens.