INFLUENCE OF ALLOYING ELEMENTS ON UNEVEN SOLIDIFICATION IN CONTINUOUS CASTING MOULD.

Abstract

In carbon steel, uneveness has the maximum value at 0. 11-0. 13% C, and decreases when the carbon content deviates. A bending force is exerted at the upper part of the shell by the different amount of shrinkage between the water-cooled copper plate side and the liquid steel side during solidifying and cooling. This force is encouraged by additional shrinkage accompanying delta yields gamma transformation. When high-temperature strength of shell is good and this force overcomes the ferrostatic pressure, the shell bends toward the liquid steel and an air gap is formed between the shell and mold.