1974 Volume 60 Issue 5 Pages 486-500
Macro-and micro-structure of continuously cast slab are studied. Macro-structure is mainly dependent on casting temperature. Because of its high solidification rate, macro-segregation hardly takes place. Macro-structure is composed of columnar dendrite, brached dendrite and equiaxed crystal. Micro-segregation takes place not only between dendrite stem and interdendrite, but also inside and outside of equi-axed crystal. Micro-segregation is causative of center line segregation of continuously cast slab when solute enriched melt is squeezed from interdendrite into cavity which is formed by solidification shrinkage or bulging of solidified shell by ferrostatic pressure.