Nov 14, 2006 · I suppose you could do it at low temperature but 250-300 F would be faster to dry it out. It wouldn't hurt to heat it higher .Some things like ceramics don't like thermal shock [i …

Oct 30, 2015 · Mr. Zuiderwik, Are you talking about silicon carbide pots ? I've never heard of silicon graphite crucibles. I agree that silicon carbide crucibles will outlast clay graphites for …

Dec 7, 2017 · Pure graphite is the most expensive, doesn't need tempering before use, and is the sturdiest. It will be hard to find a pure graphite crucible big enough for your wants at a price …

Dec 31, 2013 · I did an experiment once with an empty crucible sitting about half way into the charcoal. While I heated the charcoal to well over 1300C (bright white), the inside of the …

Jan 10, 2015 · Crucible Charge: - Clay Graphite crucible - Charge with Sorel cast iron and atomised iron powder mixed to 1.7% carbon content - Add flux of crushed glass and 1" square …

Oct 22, 2010 · So untill I finalize my research on new crucible composition I strongly recommend the following components\ratios. 6 parts Virgin Mullite, 3 parts EPK Kaolin, 1 part graphite …

Feb 11, 2006 · I am always amazed at how much carbon I get from graphite. The electro smelt buttons always spark test with good carbon but I do not ad any to the process. I just use …

Jun 24, 2006 · I would do this in a clay or clay-graphite crucible to avoid silicon pickup fron the SiC. Bottom line is 90% Tamahagane, 10% W-2 (for V) , just enough carbon to reach 1.5% C …

Jan 7, 2016 · In that case a little change in chemistry can greatly affect the patina causing problems. Best balance of caution would probably be to get a crucible and cast your ingots in …

May 14, 2021 · I made many a crucible that was tough, could handle thermal shock and was fine for non-ferrous materials and even cast iron. But, steel is a different ball game. Yes, I did make …