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Homework Help: Help me with this question

  1. Mar 31, 2009 #1
    1. The problem statement, all variables and given/known data

    13) Consider the gas carburizing of a gear of 1018 steel (0.18 wt%) at 927 C.
    Calculate the time necessary to increase the carbon content to 0.35 wt% at 0.40 mm below the surface of the gear. Assume the carbon content at the surface to be 1.15 wt% and that the nominal carbon content of the steel gear before carburizing is 0.18 wt%. D at 927 C = 1.28x10-11 m2/s. [56.6 min]

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
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