High-temperature tribological tests of composite materials

Abstract

The work is devoted to high-temperature tribological tests of carbon-containing materials during friction on 40Kh13 steel in the temperature range of 20 - 800 ° C. The choice of test temperature is based on prospects of creating spacecraft drives for operation without lubrication in the atmosphere of Venus. The studies have shown that at the same load and temperature with increasing slip speed, the friction coefficient increases. With increasing load, the friction coefficient at a given temperature decreases. At a temperature of 300 ° C for speeds of 0.05; 0.16; 0.25; 0.3; 0.37 m / s with increasing load from 0.3 MPa to 1.0 MPa, the friction coefficient decreases by 1.4; 1.8; 1.1; 1.5; 1.5 times, respectively. At a temperature of 500 ° C in the same range of speeds and loads, the friction coefficient decreases by 1.1; 1.4; 1.5; 1.7; 1.6 times, respectively.