Annealing is used in a variety of industries where metals are processed into complex structures or processed multiple times. One of the main applications of anneals is reversing the effects of work hardening. Similarly, annealing is used to remove the internal stresses that occur when the weld is solidified. In addition to steel, other metals can also benefit from annealings, such as copper, aluminum, and brass.

Working Principle of Furnaces Annealing:

Annealing is a heating treatments process used to change the chemical or physical properties of metal to make it more malleable & to reduce its hardness. An annealing furnace works by heating an annealing furnace above its recrystallization temperature and cooling it once the sample is maintained at this temperature for a suitable amount of time.

During the annealing process, the atoms within the sample are dispersed in the crystal lattice, and the number of dislocations is reduced, changing the ductility and stiffness properties of the sample. Re-crystallization occurs when the sample cools.

Heating the sample increases the rate of diffusion by providing the energy needed to break the bond. Atomic motion has the effect of redistributing and eliminating dislocations in the sample.