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You do need to heat it up
Aluminum won't force-forge well like that unless it's pre-heated, and the forging heats it the rest of the way. That's how they get the uniform grain structure, it makes the metal flow.
Unless you raise the speed to "Impact Forging" like making aluminum cans from coined blanks in a few milliseconds to get the heating effects.
Posted on Feb 14, 2012, 12:42 PM
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