依托板坯连铸机,对铸坯的展宽现象进行工业研究。通过5个连铸工厂结晶器设置的调查,对铸坯展宽的普遍性进行研究;在提出衡量铸坯展宽指标的基础上,利用仪器在线监测铸坯的展宽。结果显示: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%;且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。 Relying on the slab caster, the slab broadening phenomenon for industrial research. Based on the investigation of mold setting in five continuous casting factories, the universality of cast slab broadening was studied. On the basis of the measurement of cast slab broadening index, the broadening of cast slab was monitored online by the instrument. The results showed that the target broadening range of X60 steel ranged from 1.25% to 3.63% with an average of 3.01%. The target broadening range of Q235 steel ranged from 0.77% to 2.91% with an average of 2.04%. The broadening and pulling speed of slab were obvious The consistency of pulling speed is constant, the stretching is basically stable, the pulling speed is reduced, the broadening is reduced, and vice versa; the change of broadening lags behind the pulling speed.