Annealing (cont.)
Homogenisation
- Generally solute atoms are more soluble in liquid than in solid
- will segregate to the last material which solidified
- heat treat to allow diffusion to equilibrate solute distribution
Normalisation
- Heat steel until complete transformation to fine-grained austenite has just occurred
- Allow to cool in air to produce a fine pearlite
- Standard state for material delivery with good mechanical properties and surface finish