Re: [hobbicast] Foundry myths + shoe protection
- Thanks for the videos.
I had wondered about Al melt into water: pellets vs a solid mass.
I like the abstract nature of the piece.
Also, re shoe / boot protection.
I bought these from Drill Spot.
On Oct 10, 2011, at 10:35 PM, ferrman1001 wrote:
> Over many years I have heard and read about many foundry procedures and methods so I decided to test three of them.
> 1. New crucibles need to be heated up slowly before using to avoid heat shock.
> Every new crucible I have used is put in the furnace and turned up to maximum so it is has the shortest possible melting time, not one crucible has cracked or spalled, A new crucible was put through an extreme test and survived.
> 2. Water must not come in contact with molten metal.
> 3. Molten metal must not come in contact with water.
> Two separate experiments were made to see what would happen, there were no steam explosions. Some alarmists will get excited about these experiments, but unless water is completely surrounded by molten metal and there is no path for the steam to escape then there will be a steam explosion. I made a video of these experiments and put it on you tube. http://www.youtube.com/watch?v=HWUF6wuYDt0
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- On Oct 26, 2011, at 2:12 PM, Lyle wrote:
> Silicon carbide won't last longer for iron."The crucibles that work best with cast iron DO NOT include graphite."