Experimental Study on the Temperature Rise of a Carbon Strip and Its Influence on the Wear Performances of the Carbon Strip

A series of experimental tests on the temperature rise of a carbon strip under different electric sliding parameters were carried out using a high-speed electric sliding test machine. The results show that the temperature rise increased with increasing sliding speed, electric current and arc discharge energy, while it decreased with increasing contact force. The observation of the worn surfaces of the carbon strip indicates that the temperature rise of the carbon strip had a large influence on the morphology of the carbon strip, i.e. the higher the carbon strip, the severer the wear of the carbon strip. The wear mechanisms of the carbon strip were different under different temperature rises. At a temperature rise of 50 ℃, the wear of the carbon strip was mainly caused by exfoliating mechanical wear. At a temperature rise of 90 ℃, the main wear of the contact strip was mechanical wear with slight electric ablation. The arc erosion wear was the main wear mechanism at temperature rises between 180 ℃ and 200 ℃ with a large arc erosion area.When the temperature rise was up to 300 ℃, fatigue cracks were observed and arc erosion was the main wear mechanism.