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What is the correct answer?
4
Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called
A.
Tempering
B.
Hardening
C.
Annealing
D.
Normalising
Correct Answer :
C. Annealing
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