Friction and wear performance of sliding bearing seat of reactor pressure vessel

Abstract

This paper systematically studies the friction and wear properties between the friction plates and the support platform of the marine nuclear power plant reactor. The friction performance between SA508 steel and three different kinds of graphite is studied with a commercial reciprocating sliding friction and wear tester. The variation of friction coefficient of materials under different temperature and load is analyzed, and the wear mechanism is analyzed to decide whether these graphite materials can be applied to marine nuclear power station. The results show that in this experiment, the change trend of friction coefficient with time is increasing at first, then decreasing and finally increasing slowly; and the higher the temperature, the larger the friction coefficient; the larger the load, the smaller the friction coefficient. The wear rate of graphite materials increases with temperature and load. The wear mechanism of the material under low temperature and low load is mainly adhesion wear, accompanied by a small amount of abrasive wear, and as the temperature increases and the load increases, the abrasive wear will increase. The friction coefficient of the material exceeds the predetermined value under a certain temperature or load, so it cannot be applied to a marine nuclear power plant.