A) to a bright red hot and then cooling it slowly
B) to a bright red hot and then cooling it suddenly
C) to a temperature much below redness and cooling it slowly
D) none of the above
Correct Answer: A
Solution :
[a] During the annealing process, the metal is heated to a specific temperature. Where recrystallization can occur. At this stage, any defects caused by deformation of the metal are repaired. The metal is held at the temperature for a fixed period, then cooled down to room temperature very slowly.
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