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  1. In a hardening process, the hypo-eutectoid steel is

  2. A.
    heated from 30° C to 50° C above the upper critical temperature and then cooled in still air
    B.
    heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
    C.
    heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace
    D.
    heated below or close to the lower critical temperature and then cooled slowly

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    Answer : Option B

    Explanation :

    No answer description available for this question.


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