Improvement of antifriction properties of tribotechnical cermets by treatment in selenium vapor

Abstract

Abstract The issues of the high-temperature tribological tests of cermets during friction against steel 40X13 in the temperature range from + 600°C to +700°C in atmospheric conditions are studied in the article. The choice of temperature and test atmosphere is due to the prospects of creating friction units for operation without lubrication in extreme operation conditions. Studies have shown that when processing cermet in selenium vapor, the friction coefficient in the temperature range of 600 … 700°C is approximately 8-15% lower at a load of 1.0 MPa than the friction coefficient of untreated samples. It was found that the iron chalcogenide at a temperature of 500°C and above releases Se vapors, which are adsorbed at the tribological contact and create a lubricating layer.