Process Annealing:
In this process, steel is heated to a temperature below the LCT, and is held at this temperature for sufficient time and then cooled. Since it is sub critical annealing, cooling rates are of little importance. The purpose of this is to reduce hardness and to increase ductility, of cold worked steels so that further working may be carried out easily. It is also termed as in-process annealing. Complete recrystallization of cold worked steel may or may not take place in this process. That’s the difference of this process with re crystallization annealing. This process is being frequently applied to parts manufactured by cold forming operations such as stamping, extrusion, drawing etc, as an intermediate step.
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