圆坯连铸凝固传热数学模型及应用  

Math Model for Solidification Heat-transfer in Continuous Casting of Round Bloom and Application

作　　者：孙开明[1] 付继成[1] 李京社[2] 温德松[1,2] 

机构地区：[1]天津钢管集团股份有限公司,天津300301 [2]北京科技大学,北京100083

出　　处：《钢管》2009年第3期23-27,共5页Steel Pipe

摘　　要：建立了Φ400mm大断面圆坯连铸凝固传热的数学模型。应用该模型计算了过热度、拉速以及冷却强度等因素对铸坯温度、坯壳厚度、凝固终点的影响,为现场生产确定了合理的二冷工艺参数。生产实践证明,当生产Φ400mm铸坯的拉速达到0.4～0.6m/min时,自动控制的二次冷却制度满足工业连铸要求,可得到优质铸坯。The math model for solidification heat-transfer in continuous casting of Φ400 mm round bloom is established. It has been used to make calculation concerning the influences by elements as degree of superheat, withdrawal speed and cooling intensity on bloom temperature, shell thickness and solidification end-point, and thus proper process parameters of secondary cooling for actual site operation are determined. Relevant operation practice has demonstrated that in case of casting Φ400 mm round bloom, with a withdrawal speed up to 0.4-0.6 m/min, the automatically-controlled secondary cooling schedule is satisfactory to the requirements for commercial production of quality blooms.

关 键 词：圆坯连铸 二冷控制 传热模型 铸坯表面温度 冷却强度 

分 类 号：TF777.4[冶金工程—钢铁冶金]