Metal Temp vs. Time
Metal Temp vs. Time
(OP)
Please help me before I actually test this out with an infared thermometer.
I'd like to chart the temperature drop per second for:
8 lbs. of Aluminum (A380 specifically) in a ladle container where the top is exposed but heat will radiate from sides.
1250F starting metal temp.
72F ambient air replenished so 72F always.
For every second, the temperature will be: _____F?
I'd like to chart the temperature drop per second for:
8 lbs. of Aluminum (A380 specifically) in a ladle container where the top is exposed but heat will radiate from sides.
1250F starting metal temp.
72F ambient air replenished so 72F always.
For every second, the temperature will be: _____F?





RE: Metal Temp vs. Time
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RE: Metal Temp vs. Time
I work for a die caster and they don't have the answer.
I can use an infared thermometer but it only goes up to 950F...so, my knowledge of thermo and transfer doesn't give up the answer.
Seems easy right? Hot metal in a container losing heat to the surrounding air at a rate of X degrees per second.
RE: Metal Temp vs. Time
Alternately, you might look into some material that you can place in front of your pyrometer to reduce the flux to the detector, to capture the initial temperature behavior, but you'd need to have a good idea of how the device actually works. You might get some help from the manufacturer of the device.
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RE: Metal Temp vs. Time
Good idea, but it can easily be done be reducing the view factor to the IR detector.or equivalently reduce the solid angle.
RE: Metal Temp vs. Time
Tata
RE: Metal Temp vs. Time
Correction, not valid for a IR thermometer, but for a naked detector.
Zoomer,
Many of the IR detectors have thermocouple atachments for the higher temp measurements. If so, then get your company to get one at modest cost. Doing this analytically is not a good idea if you have the testing means.
RE: Metal Temp vs. Time
The reason I ask is even with a thermocouple the variations in temperature throughout a 8 lb mass will be significant, Making it difficult to accurately measure repeatedly.
And as stated above this isn't a linear answer. If you just want a ballpark number relative to that specific temperature range use a thermocouple with a repeatable positioning setup relative to the ladle for a few samples and plug data into excel for a linear fit t vs deg F.
RE: Metal Temp vs. Time
I know that letting the ladle dwell for X seconds will reduce the temperature down to ___F.
X is 30 seconds
T1 is 1250F metal start temperature
T2 is ____F after 30 seconds.
I'd like to say: T2 = 1200F, you lost 50F by not pouring on time. Or, you lost 200F by not pouring on time.
Introducing the plant to engineering principles.
I have an old graph for ferrous metal but not for Aluminum.
This type of data doesn't exist, but I'd like to plug and chug.
RE: Metal Temp vs. Time