OPERATING PROPERTIES OF ANTIFRICTION MATERIALS BASED ON DISPERSION-STRENGTHED COPPER BY USING THEM AS CURRENT COLLECTORS OF TRAMS
Journal Title: Проблеми тертя та зношування - Year 2018, Vol 78, Issue
Abstract
The tribotechnical and operational properties of composite materials based on dispersion- strengthened copper were investigated in comparison with the known ones used as current col- lectors in electric public transport. Products made with studied materials were produced in two technological variants. According to the first variant, the initial mixture of dispersion- strengthened copper, iron and graphite powders was pressed at a pressure of 350 MPa, and then they were sintered at a temperature of 980 °C for 60 minutes. According to the second variant, the samples were heated to a temperature of 950 °C after pressing the samples were stamped in a heated state on an arcstator press for energy of 0,160 kJ / cm3. It was discovered that the highest operational properties have the tram tire inserts, which are made of a material based on dispersion-strengthened copper by hot stamping. The last one is due to its low coefficient of friction and a small wear rate of both in material and counterface. This is due to the fact that in the case of disperse strengthening there is an increase in the strength of materials, which leads to a decrease in the coefficient of friction and increase wear resistance.
Authors and Affiliations
O. S. BOGATOV, A. M. STEPANCYUK
Keywords
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