Discussion :: Engineering Materials
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In a hardening process, the hypo-eutectoid steel is
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A.
heated from 30° C to 50° C above the upper critical temperature and then cooled in still air
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B.
heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
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C.
heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace
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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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