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Characterization of fire-refined copper recycled from scrap

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Abstract

Certain properties of fire-refined copper recycled from scrap have been characterized. A method is presented to calculate the half-softening temperature and the annealing temperature that allows 30% elongation to failure, hereinafter referred to as ε30% temperature, on the basis of hardness measurements. The relation between ultimate strain and ultimate elongation has been studied and is described by a mathematicale xpression that seems to be independent of copper composition and annealing temperature. The microstructure of annealed samples reveals that recrystallization begins at half-softening temperature, and is ending at ε30% temperature, although grain growth is not observed. An optimal range of oxygen content has been found that gives the minimum ε30% temperature for each studied composition, and a mathematical expression with which to calculate those minimum temperatures is developed. The influence of cold-working degree on ε30% temperature is also described; these temperatures reach a constant minimum value for each composition at high deformation degrees of cold-working.

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References

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Authors and Affiliations

  1. Department of Chemical Engineering and Metallurgy, University of Barcelona, Martíi Franquès 1, 08028, Barcelona, Spain

    A. Esparducer, M. A. Fernández, M. Segarra, J. M. Chimenos & F. Espiell

  2. La Farga Lacambra S.A., Colonia Lacambra, Ctra N-152, Km 81, 08519, Barcelona, Spain

    M. García & O. Guixà

Authors
  1. A. Esparducer
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  2. M. A. Fernández
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  3. M. Segarra
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  4. J. M. Chimenos
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  5. F. Espiell
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  6. M. García
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  7. O. Guixà
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Corresponding author

Correspondence to F. Espiell.

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Esparducer, A., Fernández, M.A., Segarra, M. et al. Characterization of fire-refined copper recycled from scrap. Journal of Materials Science 34, 4239–4244 (1999). https://doi.org/10.1023/A:1004650702555

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  • DOI: https://doi.org/10.1023/A:1004650702555

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