碳含量及连铸工艺参数对宽厚板坯结晶器热流的影响  

Effect of Carbon Content and Casting Parameters on Heat Flux of Mold for Wide-Thick Slab during Concasting Process

作　　者：王旭东[1] 尹少华[1] 孔令伟[1] 姚曼[1] 张晓兵[2] 陆洪周 王雄[2] 倪涛[2] 

机构地区：[1]大连理工大学材料科学与工程学院,大连116024 [2]江苏沙钢集团,张家港215625

出　　处：《特殊钢》2014年第4期37-40,共4页Special Steel

基　　金：国家自然科学基金项目(51004012);国家高技术研究发展计划(863)项目(2009AA04Z134);中国博士后科学基金项目(2012M520621/2013T60511)资助

摘　　要：对钢厂0．07％～0．18％C钢220～320mm×1800～2700mm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（0．65～1．2m／min），钢水过热度（13～35℃），结晶器进水温度（27～35℃）和结晶器液位（775—810mm）等工艺参数对结晶器铜板热流的影响。结果表明，浇铸220mm板坯的结晶器热流随拉速增加而上升，但拉速〉1．05m／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。The in-line examination and statistics on casting process for 220～ 320 mm × 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 in- cluding casting rate （0. 65～ 1.2 m/min）, liquid superheating extent （13 -55℃ ）, todd inlet water temperature （27 ～ 35 ℃ ） and mold liquid level （775～810mm） on heat flux of mold copper plate during casting process of steel grades contai- ning 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/rain, 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.

关 键 词：0 07%~0 18%C钢 宽厚板坯 碳含量 连铸工艺 结晶器热流 在线检测 

分 类 号：TF777[冶金工程—钢铁冶金] TF341.6