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.


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    Title :

    Sliding wear behavior of copper alloy contact wire against copper-based strip for high-speed electrified railways


    Additional title:

    Verschleißverhalten von Kontaktdraht aus Kupferlegierung beim Gleiten gegen Kupferbasis-Band für elektrische Hochgeschwindigkeitszüge


    Contributors:
    Jia, S.G. (author) / Liu, P. (author) / Ren, F.Z. (author) / Tian, B.H. (author) / Zheng, M.S. (author) / Zhou, G.S. (author)


    Publication date :

    2007


    Size :

    6 Seiten, 7 Bilder, 4 Tabellen, 14 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English