Process for preparing a test casting and test casting prepared by the process
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United States of America Patent
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Nov 15, 2011
Grant Date -
Mar 10, 2011
app pub date -
Sep 4, 2009
filing date -
Sep 4, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A test casting is useful for predicting the severity of skin that will form when compacted graphite iron or ductile iron is cast using a selected foundry mix. The mold is made from the foundry mix and has a gating system with at least two ingates, and with a hollow cylindrical shape associated with each ingate. The hollow cylindrical shapes are substantially the same height, but the diameter of each varies by at least 20% from the diameter of any of the other cylindrical shapes. Molten metal poured into the gating system fills each of the hollow cylindrical shapes. When the metal cools and solidifies, a solid cylinder of the metal is produced in each hollow cylindrical shape. The solid metal cylinders, each with a distinct diameter, are cut and inspected to measure the skin formed thereon.
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