Various Types of Heat Treatment Processes

Various types of heat treatment processes are: (a) Annealing (b) Normalizing (c) Hardening (d) Tempering (e) Refining Annealing Annealing is one of the most important heat treatment operation applied to steel. It is the process of heating the steel in a furnace to a point not exceeding 50° above its upper critical point and maintaining the steel at that temperature for a considerable time (30-60 minutes) to convert the whole steel to austenite. Steel is allowed to cool down slowly through a medium of hot sand, hot ashes or hot…

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