【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。更多还原

【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℃) 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 doesnt increase again;for the steel grades with peritectic reaction,with increasing liquid superheating extent the heat flux of wide and narrow face of 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.更多还原