Influence of alloying elements on central billet quality of continuous casting

Abstract

The influence of carbon content and alloying elements on the central billet quality of continuous casting has been studied. In plain carbon steels the higher central equiaxed zone (CEZ) value (the area, expressed as a percentage, of equiaxed crystals) is obtained for medium carbon content. For lower and higher carbon contents, this value becomes smaller. However, the decrease is more pronounced in the latter situation than in the former and it is associated with a deterioration of the central quality of the billet. A difference in the CEZ behaviour was found between plain carbon steel and low alloy steels. This difference can be explained by the modification that alloying elements produce in the percentage of material that transforms from δ-ferrite into austenite during the peritectic reaction.

MST/796