The Shop > Metal Stuff
Oil fired crucible furnace
vtsteam:
A pretty sight -- an evening pour beginning to cool.
vtsteam:
Thank you Dave! :bow: :beer:
When I think about it, it is kind of amazing to take some old rusty radiators and some waste oil and have it turn into something that looks like that.
vtsteam:
This is yesterday's casting. I decided to try pure (rusty) radiator scrap -- not refined ingots, sprues, prior castings or thicker iron. I did the opposite of what I've been doing recently, and added the metal to the crucible before bringing to a red heat, added charcoal to cover, and added a tablespoon of sodium carbonate (fingers crossed the crucible wouldn't get messed up).
Then I continuously added more Iron as the stuff in the crucible melted. Finally just before the pour, I added about a tablespoon more of the sodium carbonate, stirred and waited another ten minutes. Finally lifted the crucible set it in the shank, scraped the slag off quickly and poured.
Looks as good as the last one -- the little spot is just where a vent wire hit the pattern, but not a structural flaw. This face will be machined and the bore widened.
vtsteam:
Here is the top of the casting. No shrink depression or slag inclusions. Just goes to show you don't need pristine metal to get a pristine casting.
NeoTech:
Sweet looking casting.. You seem to have boiled out all the impurities of the process... =)
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