Material used to combat thermal expansion related defects in the metal casting process
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United States of America Patent
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Sep 6, 2011
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N/A
app pub date -
Oct 1, 2008
filing date -
Oct 3, 2007
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Expired
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Abstract
Thermal expansion defects, i.e. veining, are reduced in iron, steel, and nonferrous castings by adding a lithia-containing material in a sufficient amount to the silica sand mold. Adjusting current formulations to maximize the use of lesser expensive raw materials and minimize the use of more expensive raw materials to lower the overall percentages of lithia/metallic oxide containing additives while still reducing or eliminating thermal expansion related defects in the metal casting process reduces the overall cost to manufacture the product.
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