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Determine the carburizing time (in s) necessary to achieve a carbon concentration of 0.44 wt% at...

Determine the carburizing time (in s) necessary to achieve a carbon concentration of 0.44 wt% at a position 1.9 mm into an iron-carbon alloy that initially contains 0.031 wt% C. The surface concentration is to be maintained at 1.2 wt% C, and the treatment is to be conducted at 1020°C. Assume that D0 = 5.1 x 10-5 m2/s and Qd =154 kJ/mol. You will find the table below useful.

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