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Continuous cast Cu:Mg alloys controlled finely
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Rautomead International product story
Edited by the Manufacturingtalk editorial team
Dec 19, 2007
A novel resistance-heated continuous casting furnace design enables magnesium to be accurately controlled and uniformly distributed in copper-magnesium alloys.
Continuous casting technology specialists, Rautomead, of Scotland, have signed a contract with NKT Cables, of Cologne, Germany, to supply a copper-magnesium casting machine to NKT's wholly-owned subsidiary company in Changzhou, China.
Through their European operations at HFB Hettstedter Fahrleitungs-und Bronzedraht, NKT Cables group has been using Rautomead technology for production of copper-magnesium wire rod for over fifteen years.
This is used principally as the contact wire in high-speed rail systems in the European market.
NKT Cables group's latest investment for manufacture in China reflects the enormous scale of development of the transport infrastructure in the country and also recognition by the Chinese railway authorities of the advanced technology available in this field from Europe.
* Outstanding properties - with its superior balance of tensile strength, electrical conductivity, good wear and environmentally neutral properties, copper-magnesium is the preferred alloy in many countries for contact wire in high-speed rail systems with running speeds of 300km/h and more.
* Accurate control of magnesium - magnesium is a light and volatile element, where even a very small variation in alloy content causes unacceptable changes in key physical properties of the product, said Rautomead to manufacturingtalk.com.
It is, therefore, technically difficult to achieve the necessary consistency of quality in the manufacturing process.
Rautomead's unique resistance-heated continuous casting furnace design enables the magnesium to be accurately controlled and uniformly distributed in the alloy.
The new Rautomead machine will be installed in the second quarter of 2008.
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