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涟钢1号连铸机采用动态轻压下技术生产时,轻压下效果不佳,中心疏松和中心偏析达均到2.0级。通过射钉试验发现,实际液芯长度比模型计算长度短1.6～4.2m,故对铸机凝固末端预报进行了参数化修正,并在基础辊缝的基础上确定了正常与非正常浇铸条件下的轻压下参数,优化后的轻压下使铸坯中心疏松和中心偏析降到0.5级,铸坯横断面上不同位置的碳、锰含量也非常均匀,满足工艺要求。
Lianyang Iron and Steel 1 # continuous casting machine with soft production technology under mild pressure, the effect is not good, center loose and center segregation up to 2.0. Through the nailing test, it is found that the actual length of liquid core is 1.6 ~ 4.2m shorter than the calculated length of the model, so the prediction of the solidification end of the caster is parameterized and corrected. Based on the basic roll gap, the normal and abnormal casting conditions Of soft reduction parameters, under the optimized conditions of slab center loose and center segregation down to 0.5, cross-sectional billet cross-sectional carbon and manganese content is also very uniform, to meet the process requirements.