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A Design Study in Centrifugal Steel Castings - Accumulator Cylinder                                  

Benefits of Centrifugal Casting

In centrifugal casting the rapidly spinning mold (>1000 rpm) forces the molten metal against the "cold" wall of the mold. The metal solidifies from the outer diameter (OD) of the casting in towards the inner diameter (ID). 

Centrifugal casting has three primary metallurgical benefits:

  1. The rapid directional solidification from the OD to the ID produces a consistent  grain structure with excellent strength and toughness.

  2. The molten metal on the interior wall feeds the solidification front and shrinkage porosity is minimized without the use of risers or gating.

  3. Under the centrifugal force,  lighter inclusions and gas porosity  in the molten metal strongly migrate to the interior bore. 
    The ID of the cooled casting is then machined  to remove the consolidated casting anomalies -  oxides, impurities, and gas porosity.

Centrifugal casting produces a cast tube that is flaw free through its thickness with excellent mechanical properties.


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Copyright 2004  by the Steel Founders' Society of America   All rights reserved. 
Address comments to: blairr@sfsa.org
Last Modified:April, 2004 by STG

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