X80板坯传热凝固数值模拟

Numerical Simulation of Heat Transfer and Solidification in X80 Slab

以某钢厂X80钢板坯为研究对象,采用ProCAST软件建立凝固数学模型,模拟了不同连铸工艺条件下230 mm×1 280 mm X80管线钢板坯凝固过程中各点温度及凝固率的变化情况,研究了过热度、拉速和比水量对板坯凝固过程的影响。研究结果表明:过热度对铸坯凝固影响最小,随着过热度增加,铸坯表面温度升高,铸坯液相穴长度随之增加,而两相区则随之减小;拉速对铸坯凝固影响最大,拉速提高,铸坯表面温度、液相穴长度、两相区均增大;比水量增加,铸坯表面温度降低,液相穴长度减小。

The solidification mathematical model was established by using X80 steel slab.The variationof the temperature and solidification rate of the 230 mm×1 280 mm X80 pipeline steel slab was simulated during the solidification process under different continuous casting process conditions.The effects of superheat,casting speed and cooling water on the solidification process of slab were studied.The results showed that the superheat had little effect on the solidification of the slab.With increasing of the superheat,the surface temperature of the slab increased andliquid pool length increased,while the length of two-phase zone decreased.The casting speed has the greatest effect on slab solidification The surface temperature,liquid pool length and the length of two-phase zone were all increased with the increase of the casting speed.Whenthe water ratio was increased,the surface temperature of the slab and liquid pool length decreased.