The annealing process’ purpose is to restore magnetic properties and reduce core losses.
Cores are loaded into continuous furnace and heated up to a specific temperature that is determined by the type of annealing required. Cores are then soaked at this temperature for a prescribed period of time. After soaking, cores are slowly cooled down while moved towards the end of furnace.
The advantages of annealing are to remove stresses, induce softness, alter ductility, toughness or other physical properties. Annealing is also used to form a strict micro-structure and to restore the crystalline structure.