Question:-
Heating the hypo eutectoid steels to 30°C above the upper critical temperature line, soaking at the temperature and then cooling slowly to room temperature to form a pearlite and ferrite structure, is known as
Option (A)
Hardening
Option (B)
Normalising
Option(C)
Tempering
Option(D)
Annealing
Correct Option:
(D)
Question Solution:
Slow cooling signifies cooling in furnace so it refer annealing process
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