Process Variables:

The major variables in the centrifugal casting procedure are pouring temperature, rotation speed, mould temperature and pouring speed.

Rotation speed is varied throughout the casting process. At the time of molding the mould is rotated at a speed, which is sufficient to throw molten metal against the mould wall. As soon as the metal attained the opposite end of the mould, the rotation speed is enhanced and kept constant for sometime based upon metal being cast and final wall thickness. The most significant effect of enhanced speed is to promote grain refinement in the structure of metal. The ideal speed of rotation curbs quick adhesion of the molten metal to the mould wall along minimal vibration.

Pouring temperature influence metal solidification. Higher pouring temperatures give go up to columnar grain structure while lower pouring temperatures promote grain refinement and result in equiaxed structure.

The metal being cast regulates pouring speed, as it is essential to complete delivery of the molten metal into the mould before the metal come in mushy state and might lead to faulty castings. Higher speeds might cause turbulence.