Question: consider the gascarburizing problem for a steel sample with 02...

Consider the gas-carburizing problem for a steel sample with 0.2 w/o carbon. The gas-carburizing is performed at 1000°C with the diffusivity of carbon in steel equal to 1 x10-10m2/sec, and the surface carbon concentration is 0.8 w/o. Calculate the carburizing time required to obtain 0.6 w/o carbon at 1.0 mm below the surface.