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Northbysouth
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16. As part of a heat-treating process, an alloy-steel billet, initially at 1032°F, is cooled in a 32°F air stream. The temperature history of the billet is shown in the figure at right.
What is the time constant τ for the cooling process?
I have attached an image of the question.
I have the equation:
T = T∞ + (Ti-T∞)e-t/τ
I know that:
T∞ = 32°F
Ti = 1023°F
But I'm a little uncertain about the time. If I take the max temperature value, 1032°F, and multiply this by 0.368, would this give me the time and temperature at one time constant?
What is the time constant τ for the cooling process?
I have attached an image of the question.
I have the equation:
T = T∞ + (Ti-T∞)e-t/τ
I know that:
T∞ = 32°F
Ti = 1023°F
But I'm a little uncertain about the time. If I take the max temperature value, 1032°F, and multiply this by 0.368, would this give me the time and temperature at one time constant?