| This paper aims at researching solidification process in continuous casting of thin slab and by numerical simulation. Temperature distribution and shell growth process of thin slab in solidification are simulated. The impactions of casting speed, measures of secondary cooling zone water, and thickness of billet to the temperature distribution and shell growth have compared. Change measures of secondary cooling zone water have two approaches, be to change streams density of segment and to change secondary cooling zone lengths, respectively. On the basis of the simulation in temperature distributions and shell growth, the shell shrinkage and shell stress flied in the mould are simulated, too. The effects of casting speed and thickness of billet on shell shrinkage and shell stress flied have compared.The model reflects the temperature distributions, shell growth, shell shrinkage, and shell stress flied for the solidification process in continuous casting of thin slab. This simulation results that are true have certain practical value for industry production.The continuous casting speed has high influence on the temperature distribution and shell growth. As the increase of casting speed, the temperature of shell will heighten and the length of liquid core will extend. Also, the casting speed had an enormous impact on the shell shrinkage in the mould.When cooling water of segment changes 22%, surface temperature distribution changes of less than 1% and the solidification position of billet changes less than 0.1m.The influences of streams density of segment on temperature filed and shell growth are limited, when streams density of segment changes 22%.The influences of length of secondary zone on temperature filed and shell growth are more obvious than the streams density of segment. The influence efficiency depends on the casting speed in some extend.The influences of billet thickness on temperature filed and shell growth are intensive. But the influences on the shell shrinkage in the mould are very small and can be ignored. |
