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
Related Articles
- EP ID EP366490
- DOI -
- Views 51
- Downloads 0
FORCED COOLING OF THE FRICTION UNITS: «HEAT PUMP» EFFECT
A variety of types of brake devices used in the drives of hoisting and transport machines, road and construction machines, vehicles and in other branches of engineering. Friction pairs of brake devices significantly diff...
OPTIMIZATION OF THERMO-MECHANICAL CYCLIC STRESSES AT CRITICAL POINTS OF HOT-SECTION COMPONENTS IN GAS TURBINE ENGINES
Estimation methods of thermo-cyclic durability of high-temperature alloys in critical points of hot part components of gas turbine engine and in conditions of accelerated thermo-cyclic tests are given in the article. The...
THE INFLUENCE OF DOUBLE ELECTRICAL LAYERS IN THE "METAL- ELECTROLYTE-POLYMER" FRICTION PAIR ON ITS ENERGY-LOADING (PART TWO)
The materials of the article illustrate the estimation of the energy loading of a metal friction element in a “metal-electrolyte-polymer” friction pair while forming various types of double electrical layers with the rel...
THE INFLUENCE OF TEMPERATURE AND LOADING CONDITIONS ON WEAR PARAMETERS OF BAINITIC CAST IRON
In this work it was studied the influence of temperature on the wear parameters of bainitic cast iron. The results have showed that the wear resistance decreases significantly with increasing up to 50 and 100oC Wear feat...
THE ISSUE OF DEFINITION OF ELECTRICAL CONTACT RESISTIVITY IN THE TRIBOCOUPLING OF THE METAL-POLIMER FRICTION PAIRS OF THE BRAKING DEVICES
During electrical thermal mechanical frictional interaction of the contact spots of the microprotrusions of the friction pairs of the braking device one of the main operating parameters is the contact resistivity of thei...