Investment casting refractory material
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United States of America Patent
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Jan 10, 2017
Grant Date -
Jul 10, 2014
app pub date -
Jan 7, 2013
filing date -
Jan 6, 2012
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Abstract
An investment casting method involves producing a casting shell by applying a hardenable refractory material to a sacrificial pattern. The casting shell having a plurality of phosphate bonds in the hardenable refractory material, which provide increased structural integrity during casting and improved frangibility during shell removal. The casting shell may also have a plurality of gaseous pockets suspended in the refractory material, which do not degrade the structural integrity during casting and provide improved frangibility during shell removal.
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