圆坯连铸凝固传热数学模型及应用  

Math Model and Application for Heat Transfer during Solidification of Concasting Round Bloom

作　　者：唐海燕[1] 李京社[1] 韩丽敏[1] 温德松[1,2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]天津钢管集团有限公司炼钢厂,天津300301

出　　处：《特殊钢》2009年第4期5-7,共3页Special Steel

摘　　要：建立了34Mn5V钢Φ400 mm圆坯连铸过程中的凝固传热数学模型,运用该模型计算得到的二冷各区控制点的表面温度与现场实测结果一致。用该模型计算得出,钢水过热度对铸坯表面温度影响较小,拉速和二冷区冷却强度对铸坯温度影响较大。生产实践表明,当生产Φ400 mm铸坯的拉速达到0.4～0.6 m/min时,自动控制的二次冷却制度能满足工业连铸要求,可得到优质铸坯。Math model of heat transfer during solidification of Ф400 mm eoncasting round bloom of steel 34Mn5V has been established and surface temperature values at controlling location of each secondary zone calculated by the model showed no difference to that measured at production ground. It is obtained with calculation by model that the effect of liquid superheating extent on surface temperature of bloom is minor but the effect of casting speed and secondary cooling intensity on temperature of bloom is larger. Production practice showed that the automatic control secondary cooling system met the requirements of industrial concasting Ф400 mm round bloom with cast speed 0. 4 -0. 6 m/min to get quality cast bloom.

关 键 词：二冷控制 传热模型 圆铸坯 表面温度 

分 类 号：TF777[冶金工程—钢铁冶金] TU832.29[建筑科学—供热、供燃气、通风及空调工程]