Explains what is Annealing The Steps involed in Annealing Procedure of Annealing Need and the advantages for annealing The cooling graphs are also included in the slides Best for presenting this slide along with some additional content.

1. Full Annealing
ASWANTH SELVA PRAGATHEESWARAN

2. Firstly, What’s Annealing?
 The term annealing refers to a heat treatment in which a material is
exposed to an elevated temperature for an extended time period and then
slowly cooled.

3. Why?
Annealing is carried out to
 Relieve stresses
 Increase softness, ductility,and toughness
 Produce a specific microstructure.

4. How’s it done?
1. Heating to the desired temperature,
2. Holding or ‘‘soaking’’ at that temperature
3. Cooling, usually to room temperature
Any annealing process consists of three stages:
Time and temperature are important parameters in these procedures.

5. Types of annealing
 There are many types of annealing and full annealing is one of it.

6. When do we use Full Annealing?
 Full Annealing process is often utilized in low and medium carbon steels
that will be machined or will experience extensive plastic deformation
during a forming operation.

7. The Full-Annealing procedure
 The alloy is austenitized by heating to 15° to
40°C above the A or A lines as indicated
until equilibrium is achieved.
 The alloy is then furnace cooled; that is, the
heat-treating furnace is turned off and both
furnace and steel cool to room temperature
at the same rate, which takes several hours.
 The microstructural product of this anneal is
coarse pearlite (in addition to any
proeutectoid phase) that is relatively soft
and ductile.

8. Full – annealing cooling procedure
 The full-anneal cooling procedure as
shown in the figure alongside is time
consuming (slow cooling curve)
 But even then, a microstructure
having small grains and a uniform
grain structure results which are the
required physical properties.

9. Thank You