Elsevier

Wear

Volume 216, Issue 2, 1 April 1998, Pages 179-183
Wear

Wear mechanism of copper alloy wire sliding against iron-base strip under electric current

https://doi.org/10.1016/S0043-1648(97)00162-2Get rights and content

Abstract

In electric railways, the wear rate of trolley wire decides the life of the wire. In order to search for methods of decreasing the wear rate. laboratory wear test was carried out with three types of wire materials sliding against an iron-base sintered alloy strip under electric current flow condition. The test results indicate that the wear rate of wire is related to beat generated at contact surfaces. The heat is generated by friction force, by electric contract resistance, and by arc when contact loss occurs between wire and strip. Wear rate of trolley wire is expressed with two parameters as a wear map. Three types of wear particle shapes are recognized and they are shown in three regions in the map.

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There are more references available in the full text version of this article.

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    Wang et al. [22] reported that the Cu–Ti–Cr–Mg–Si alloy after the multi-stage thermomechanical treatment has a yield strength, tensile strength, elongation and electrical conductivity of 1072 MPa, 1144 MPa, 6.1% and 24.1 %IACS, respectively. To satisfy the service conditions under current-carrying friction, the increasingly stringent properties are required for the sliding electrical contact Cu alloys, such as good electrical and thermal conductivity, and outstanding wear resistance [23–33]. So far, these methods, such as surface modification, micro-alloying, lubricant addition and precipitation hardening have been proposed to enhance the current-carrying friction and electrical conductivity.

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