Annealer curve characteristics of electrolytically refined tough pitch copper (Cu-ETP) and oxygen free up-cast copper (Cu-OF) for electrical cable wires
- Authors: Banganayi, C. , Nyembwe, K. , Mageza, K.
- Date: 2020
- Subjects: Cu-OF , Cu-ETP , Percentage elongation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/462603 , uj:41255 , Citation: Banganayi, C., Nyembwe, K. & Mageza, K. 2020. Annealer curve characteristics of electrolytically refined tough pitch copper (Cu-ETP) and oxygen free up-cast copper (Cu-OF) for electrical cable wires. , DOI: https://doi.org/10.1016/j.rinma.2020.100146
- Description: Abstract: Annealing is a critical step during the wire drawing of copper to produce wires with the required ductility and conductivity for electrical applications. In this investigation, the characteristics of commercial annealers for wire drawing of electrolytically refined tough-pitch copper (Cu-ETP) and oxygen-free upcast copper (Cu-OF) wires were assessed through annealer curves with respect to applied voltage and resulting percentage elongation of final products. Experiments were carried out on three M315 Niehoff machines of varying speeds used for medium wire drawing from 2.2 mm diameter to 0.66 mm and 0.53 mm diameters. The results show similarities and differences between annealer curve characteristics of wire drawing machines regarding the required voltage for minimum and maximum elongation of wires without oxidation depending on the type of copper raw material used. In particular, the minimum 18% required elongation of wires was achieved with the same applied voltage irrespective of the machine speed and type of copper. In addition, Cu-OF reached higher maximum percentage elongation without oxidation of the wire compared to Cu-ETP.
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Foundry localisation strategy implementation as a vehicle to South African industrialisation : MCTS contribution
- Authors: Mulaba-Bafubiandi, A. F. , Mageza, K. , Varachia, M. F.
- Date: 2017
- Subjects: Localisation strategy , Foundries , State Owned Enterprises
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/259236 , uj:27271 , Citation: Mulaba-Bafubiandi, A.F., Mageza, K. & Varachia, M.F. 2017. Foundry localisation strategy implementation as a vehicle to South African industrialisation : MCTS contribution.
- Description: Abstract: Localisation strategy is one of the South Africa government strategies aimed at promoting economic growth and re-industrialization of the country through local content programme. The foundry sector is one of the foundation stones for metal related manufacturing and fortunately has been selected as one of the focus industries for localisation programme. However the economic sustainability of South Africa foundries have been in dramatic decline, South Africa had about 450 foundries in the 1980s, just over 200 were found in 2003 and about 170 were left in 2014. This dismal decline in foundries is due to years of underinvestment, a widening skills gap and import leakage. The South African government through its state departments had introduced localisation strategy initiative to promote procurement of local content produced locally for use in government initiated projects such as State Owned Enterprises (SOE) Infrastructure programme as a means of supporting local foundries’ competitiveness. This paper highlighted the role of the MCTS in the broader South Africa Industrialisation strategy such as; human capital development, technology transfer, product and process improvement.
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