Zagirov N.N., Loginov Yu.N., Ivanov E.V. Recycling of copper wire scrap into initial long products by metal forming

Abstract

Problem Statement (Relevance): This article describes a technology of making long rods and wire from lump copper by hot deformation of sparse materials. The proposed method may help increase the yield as it eliminates the waste of metal which is a typical feature of the melting operation. Objectives: The objective is to test the energy- and resource-saving method of processing waste copper wire to produce semi-finished and finished products with given mechanical characteristics. Methods Applied: The proposed method is based on such processes as hot briquetting, hot extrusion, cold drawing and annealing, which take place under specified conditions. A conventional tensile test procedure was used to analyse the strength and ductility of copper rods and wire. Originality: This article offers an original approach to waste steel product processing based on the methods that are extensively used in powder and granular technologies, but that are not popular in secondary raw materials recycling industry. Findings: The authors demonstrated the possibility of producing long copper wire from waste fragments exclusively by hot deformation. The behavior of the material at all the stages is similar to that of semi-finished products made from compact copper. It was found that it was possible to vary the degree and the combination of strength and ductility in the resultant wire by changing the total reduction during drawing and the place of recrystallization annealing in the drawing sequence. Practical Relevance: This experience and the results of the research may be a potential basis for popularizing and designing similar metal processing technologies which can also be applicable to non-ferrous metals and alloys.

Keywords

Copper, wire waste materials, briquetting, extrusion, drawing, annealing, mechanical properties, structure.

Nikolay N. Zagirov – Ph.D. (Eng.), Associate Professor

Siberian Federal University, Krasnoyarsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Yury N. Loginov – D.Sc. (Eng.), Professor

Ural Federal University, Yekaterinburg, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Evgeny V. Ivanov – Assistant Professor

Siberian Federal University, Krasnoyarsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

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