Can carburization be avoided in a propane fired furnace?
Can carburization be avoided in a propane fired furnace?
(OP)
We have a requirement that certain castings be heat treated in a vacuum and/or inert gas atmosphere furnace. However, one casting is too large for the supplier's atmosphere controlled furnace, and is proposing to use a propane fired furnace instead, stating that this is effective at avoiding excessive carburization as well as the atmosphere controlled furnace. They provided a propane certification citing low sulfur content (8 ppm by weight) for partial justification. The casting material is CA6NM.
Is there a significant difference between using the vacuum/inert gas furnace vs. the propane furnace? Also, what does the sulfer content have to do with it? I have found no reference to sulfur regarding carburization during heat treatment. Thanks in advance for any assistance with this question.
Is there a significant difference between using the vacuum/inert gas furnace vs. the propane furnace? Also, what does the sulfer content have to do with it? I have found no reference to sulfur regarding carburization during heat treatment. Thanks in advance for any assistance with this question.





RE: Can carburization be avoided in a propane fired furnace?
RE: Can carburization be avoided in a propane fired furnace?
RE: Can carburization be avoided in a propane fired furnace?
RE: Can carburization be avoided in a propane fired furnace?
These parts would need to be pickled after anneal in order to clean them.
The parts annealed in the propane furnace will probably see faster cooling rates, which may actually help the properties.
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Corrosion, every where, all the time.
Manage it or it will manage you.
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RE: Can carburization be avoided in a propane fired furnace?
EdStainless: What is the purpose of the excess air--does this just ensure complete combustion minimizing CO?