Normalizing ;
1. Refines most part of the steel.
2. To remove internal stresses.
3. Reduce brittleness caused by cold working.
4. Restore toughness of metal reduced by prolonged hot working.
5. To obtain finer grain structure and relatively higher value of yield point and impact strength.
Process :-
Heating plain carbon steel above upper critical temperature 50 deg. celsius
Holding at that temp. for a short while depending upon the section thickness.
Cooling the steel in still air.
Effects :-
Hearting removes internal stresses and slow cooling refines grain structure and improves strength and toughness.
Read More : Heat Treatment
