Abstract: In order to simulate solidification process of the bloom continuous casting under different technological factors ,the solidification process of 82B steel is simulated by using finite element method, and temperature field of 280 mm x 325 mm casting bloom is obtained. The results show that the solidification at f_s=1 and f_s =0 both move backward with the increase of the casting speed from 0. 60 m/min to 0. 76 m/min, but the solidification time of center increases by 9. 8% ； when the superheat increases from 15 °C to 50°C , the solidification end （f_s=1） also moves backward about 1. 1 m. Based on simulation result to improve casting process, as casting speed increasing from 0. 60 m/min to 0. 76 m/min, with adding soft reduction, it is availebe to improve macrostructure quality.

摘要： 为模拟不同工艺条件下的连铸坯的凝固过程,采用有限元法模拟了82B钢连铸的凝固过程,获得280 mm×325 mm连铸坯的温度场。结果表明,随拉速从0.60 m/min增加到0.76 m/min,凝固时f_s=1处与f_s=0处皆后移,但中心凝固时间反而增加了9.8%。随过热度由15℃增加到50℃时,凝固末端f_s=1处同样后移,约后移1.1 m。根据模拟结果改进连铸工艺,当拉速从0.60 m/min增加到0.76m/min,增加轻压下工艺可改善低倍质量。

关键词: 280 mm x325 mm连铸坯, 温度场, 二次冷却区, , 数值模拟, SWRH82B钢