BILLET TEMPERATURE in Aluminum Extrusions

BILLET TEMPERATURE in Aluminum Extrusions
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Posted by: maharajan ^®

08/01/2004, 21:43:00

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Hello All:

I would like to know the appropriate temperature to which the billet needs to be heated. Is it dependent on the temper value of the extrusion ? (like T1, T2, T5, T6 etc). Or is it also dependent on the cross sectional area of the product that is extruded ?

We have a billet heater with 3 zones. They are maintained at 3 different temperatures. For a T6 alloy, temperature is maintained at:

Zone 1 - 810 F
Zone 2 - 860 F
Zone 3 - 920 F

The combination of the 3 temperature values varies with the die's temper requirement. For a T5 alloy, it could be:

Zone 1 - 780 F
Zone 2 - 820 F
Zone 3 - 900 F

But the press operators are not very sure about the exact temperature to be maintained. As a result, different workers in different shifts heat the billet at different temperatures.

More information on this would be very helpful.

Thanking you,
Maharajan

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