材料期刊网

本文依托板坯连铸机，对铸坯的展宽现象进行工业研究。通过五个连铸工厂结晶器设置规律的调查发现 ，连铸过程的展宽现象具有普遍性；在提出衡量铸坯展宽指标的基础上，利用仪器对铸坯在出铸机位置在线监测，数据显示：X60钢的目标展宽率范围为：1.25%~3.63%，平均为3.01%；Q235钢目标展宽率范围为：0.77~2.91% ，平均为2.04%；铸坯的展宽和拉速有明显的一致性，拉速恒定，展宽也基本保持稳定，拉速降低，展宽减小，反之亦然；展宽的变化略微滞后于拉速的变化；

The phenomenon of broadening of slab was studied based on several continuous casting manufactures. The investigations of setting of mold in five continuous casting manufactures indicated that the phenomenon of broadening of slab commonly exists in the process of continuous casting.On the basis of putting forward the target of slab broadening, the apparatus is utilized to watching the slab in the exit of caster and some data are achieved, which indicates that the ultimate ratio of X60 steel-broadening ranges from 1.25% to 3.63%, 3.01% on average. The data also shows that the ultimate ratio of Q235 steel-broadening ranges from 0.77% to 2.91%, 2.04% on average. The slab-broadening has nice correlation with cast speed that the broadening stays stable when the cast speed is settled and the broadening decreases when cast speed is reduced, and vice versa, but the change of broadening is later than the change of cast speed.