Abstract: The in-line examination and statistics on casting process for 220 ~ 320 mm x 1 800 ~ 2 700 mm wide-thick slab of 0.07% ~0,18% C steel have been carried out for one year at steel work to study the effect of process parameters including casting rate (0.65 ~ 1. 2 m/min), liquid superheating extent (13-35 ℃), mold inlet water temperature (27 -35°C) and mold liquid level (775 -810 mm) on heat flux of mold copper plate during casting process of steel grades containing different C%. Results show that with casting 220 mm slab with increasing casting rate the mold heat flux increases, but as casting rate more than 1. 05 m/min, the heat flux doesn't increase again； for the steel grades with peritectic reaction, with increasing liquid superheating extent the heat flux of wide and narrow face o£ slab increases, but with increasing inlet water temperature the heat flux decreases ； due to the effect of peritectic phase transformation, during casting 0.13% C steel the mold heat flux is lowest.

摘要： 对钢厂0.07%~0.18%C钢220~320 mm×1 800~2700 mm宽厚板的连铸过程进行了一年的在线检测与统计,研究了不同碳含量的钢种的拉速(0.65~1.2 m/min),钢水过热度(13~35℃),结晶器进水温度(27~35℃)和结晶器液位(775~810 mm)等工艺参数对结晶器铜板热流的影响。结果表明,浇铸220 mm板坯的结晶器热流随拉速增加而上升,但拉速>1.05 m/min时热流不再增大;对具有包晶反应的钢种,宽面与窄面热流随钢液过热度的增加而增大,但进水温度升高,热流降低;受包晶相变收缩的影响,浇铸0.13%C钢时结晶器热流最低。