sfsa_s.gif (4934 bytes) amc.gif (6172 bytes)

afs.gif (3195 bytes)
A Design Study in Centrifugal Steel Castings - Accumulator Cylinder                                  

Thermal Management

Solidification in the mold is carefully controlled by management of five thermal factors in the casting process.

  1. Preheating the mold to a specified temperature.

  2. Tailoring the composition and thickness of the ceramic coating  on the interior of the mold to control the heat transfer rate into the mold wall. 

  3. Controlling the pour temperature of the molten metal in the ladle.

  4. Water cooling the outer diameter of the mold to accelerate cooling and solidification at the critical point in the casting process.

  5. Adding an exothermic compound ("liquidizer") to the interior of the mold to prevent premature solidification of the interior bore of the casting.


Steam forming from the water spray cooling of the mold.

The controlled directional solidification from the outer diameter to the inner diameter of the cylinder produces a sound casting with uniform grain structure and excellent mechanical properties.


Back


Next

22
 
Copyright 2004  by the Steel Founders' Society of America   All rights reserved. 
Address comments to: blairr@sfsa.org
Last Modified:April, 2004 by STG

arrow_top.gif (1191 bytes)
Page 1

 In cooperation with
 Spuncast, Inc.