Heat Treatment

Heat treatment is the controlled heating and cooling of metals for the purpose of altering their properties because both mechanical and physical properties can be alterede by heat treatment and it is one of the most important and widely used manifacturing processes.the designer who select material and the engineer who determines its processing must be aware of the possible changes in properties.

some heat treatments for steel are;

spheroidizing annel
recyrstallization annealing
stress relief annealing
full annealing
normalizing

and if you want to see annealing temperatures on carbon-temperature diagram ;