The Role of Cold Drawing on Electrical and Mechanical Properties of Copper Cables
Nofal Al- araji, Haydar M. AL-Tamimi and Wissam T. Alshammari
Abstract
The aim of this paper is to evaluate the effect of drawing process on the electrical and mechanical properties of copper wire. Electrical high tension network required cables to conduct electrical flow from one location to the next. The specific electrical and mechanical properties of the cable are affected by the forming that takes place during the drawing processes. The effects of cold drawing on electrical and mechanical properties of (99.9% Cu) copper wire are examined as a function of drawing ratio. Mechanical cold affected the electrical conductivity in copper wire; the result shows that electrical conductivity increased up to (R_A=22%) at five passes. Also, the microhcrduses (Hv) increased the surface with the increases in reduction area. The investigation shows that the strength of copper wire is explained by the effect of work hardening due to the refining process of microstructure, also the surface temperature copper wire affected by the number of drawing passes.
Keyword
Copper alloy, conductivity, reduction area, wire drawing, friction coefficient.