The foundry engineer uses chills
to produce sound castings by controlling thermal gradients and the location and direction
of solidification in the casting.
A chill is a block of material (sand or metal) which
has a high heat capacity and/or thermal conductivity, which accelerates the rate of heat
extraction in a critical area of the casting.
Chills Induce Solidification Between Risers
Chills placed on a wall or
plate sections will improve the effectiveness of the riser in feeding molten metal to the
casting.
The chill produces an “end-effect” (a
portion of the casting that solidifies first) that insures that directional solidification
occurs between risers.
This insures that the risers feed into the casting and
don’t feed into each other.
Copyright
2001 by the
Steel Founders' Society of America
All rights reserved.
Address comments to: blairr@sfsa.org
Last Modified:September, 2001 by STG
