This paper reports the study of the sliding wear behavior of the Cu-Ag-Cr wire. Cu-Ag-Cr alloy is a promising contact wire material for high-speed electrified railways, which has an excellent combination of mechanical strength and electrical conductivity. Wear tests were conducted under laboratory with a special sliding wear apparatus, which simulated the tribological conditions of sliding current collectors on overhead wires in the railway system. The Cu-Ag-Cr alloy wire was slid against a copper-based powder metallurgy strip under unlubricated conditions. The same strip as those in the train systems were used. Worn surfaces of the Cu-Ag-Cr alloy wire were analyzed by SEM (scanning electron microscopy) and EDS (energy dispersive X-ray spectrum). Within the studied range of electrical current, normal pressure and sliding speed, the wear rate increased with the increasing electrical current and the sliding distance. Compared with a Cu-Ag contact wire under the same conditions, the Cu-Ag-Cr alloy wire had much better wear resistance. Adhesive wear, abrasive wear and arc erosion were the dominant mechanisms during the electrical sliding processes.
Sliding wear behavior of copper alloy contact wire against copper-based strip for high-speed electrified railways
Verschleißverhalten von Kontaktdraht aus Kupferlegierung beim Gleiten gegen Kupferbasis-Band für elektrische Hochgeschwindigkeitszüge
2007
6 Seiten, 7 Bilder, 4 Tabellen, 14 Quellen
Aufsatz (Zeitschrift)
Englisch
Elasticity of contact wire catenary fastenings on electrified railways
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