Both rotor aluminiums are manufactured from virgin aluminium and are preferably used in the manufacture of rotors for cage anchor motors. The rotor aluminium is preferably processed in the die casting process (AI99,79) or the coquille casting process (AI99,5R). They are also cast in sand and slip casting. The outstanding feature of both alloys is the high level of electrical conductivity. Conductivity values of 34.8 m/Wmm² (ROTOR ALUMINIUM-Al99,7R) and 34.0 m/Wmm² (ROTOR ALUMINIUM-Al99,5R) as possible in coquille cast parts with proper processing and avoidance of porosity.
The tendency to hot cracks is reduced to a minimum through the precisely set ratio of the iron and silicon content. Weldability and corrosion resistance of both alloys are very good, machinability is satisfactory. |
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