

Engineering Materials - Engineering
Q1: In a hardening process, the hypo-eutectoid steel isA 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
ANS:B - heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium Explanation: No answer description is available. |


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