Friction and Wear Mechanism of Sliding Pairs for Incremental Launching Equipment

Abstract:

In order to study the friction and wear performance of sliding pair of incremental launching equipment， a wear test-bed which can simulate the working process of incremental launching equipment is proposed. Tribological tests for the sliding pair composed of acrylonitrile butadiene styrene （ABS） and molybdenum disulfide （MoS₂） reinforced polytetrafluorethylene （PTFE） and 0Cr18Ni9 stainless-steel were conducted on the wear test-bed. At different loads without lubrication， the variation of friction coefficient of friction pair was discussed and the wear mechanism of the friction pair was revealed. The microscopic and chemical composition of the worn surface for the sliding pairs were discussed by using scanning electron microscope （SEM） and energy dispersive spectrometer （EDS）. The results show that， with the increase of sliding times， the friction coefficient of the sliding pair first increases， then decreases， and finally stabileizes. Moreover， the initial value of friction coefficient at heavy load is larger than that at light load， but the final stable value is smaller than that at light load. At light load， the main wear mechanism is abrasive wear and adhesive wear. However， at heavy load， the main wear mechanism is adhesive wear and fatigue wear.

Key words:wear mechanism;coefficient of friction;sliding pair of incremental launching equipment;composite;0Cr18Ni9 stainless-steel