Nitriding is a process in which nitrogen is diffused into a steel surface to increase the strength of a component. It h

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Nitriding is a process in which nitrogen is diffused into a steel surface to increase the strength of a component. It has been determined that a satisfactory depth of nitrogen layer is obtained on BCC iron after one hour of exposure to 700°C. How long will it take to produce a layer of the same thickness if the process is carried out at 600°C?
?%N ?%N x mm; 7% N
Par de difusión D. (cm/s) 0.23 Cen Fe FCC Cen Fe BCC 0.011 Hen Fe FCC Q (cal/mol) 32,900 20,900 10,300 3,600 34,600 18,300 0.0063 Hen Fe BCC 0.0012 Nen Fe FCC 0.0034 N en Fe BCC 0.0047