Effects of some factors such as the superheat of molten steel

casting speed and the size of steel strip on feeding speed were investigated.The results reveal that the feeding speed is increased with increasing in casting velocity

and the optimized casting velocity and over-heating temperature of the liquid steel are 1.2

1

.4m/min and 28

3

1℃

respectively.With feeding ratio of approximately 1%

feeding speed is decreased with steel strip size increase.The OM observation shows that the technology can enlarge equiaxed grain zone at center to 45%

5

5% of cross section area

greatly eliminating the center segregation and increasing the compactness of center structure

meanwhile

the macro-structure of the continuous casting billet is improved with the decrease of composition heterogeneity at axial direction and improvement of steel strip quality.In addition

the casting velocity of the caster is increased by 30%

3

5%.