Purpose of normalizing is to

Explanation:

Normalizing: 

• Heat the steel from 30°C to 50°C above its upper critical temp, held about fifteen minutes, and then allowed to cool down in still air.
• The homogeneous structure provides a higher yield point, ultimate tensile strength, and impact strength with lower ductility to steels.
• The main purpose of normalizing is to refine grain size.

Main objective

• Refine grain size in metal, improve strength and hardness, reduce ductility
• Remove cold work stress.
• Remove dislocations due to hot working.