Thread: corking molds
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Old 11-18-2019, 09:47 AM
Shawn Everette Shawn Everette is offline
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Unless your mold was a very low temp alloy, or had a contamination, it really should have done nothing in a 900* kiln. A good foundry melt should be pretty consistent throughout the entire product.

You are correct in that the oxide layer melts considerably higher, about 3200*, but the naturally occurring oxide layer is not going to be thick enough to support a hollowed out core under any kind of stress.
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