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根据济钢Ｒ６－１０００型连铸机板坯表面纵向裂纹的特征，从钢水成分、工艺操作、机械设备等方面进行分析，指出控制Ｃ含量避开亚包晶钢范围，Ｍｎ含量控制在中上限；合理设计浸入式水口，插入深度控制在１３５±５ｍｍ；采用专用保护渣，降低裂纹指数；拉速控制在０．８２ｍ／ｍｉｎ，稳定负滑动时间；控制ＭＤ进出水温差在７℃，可以预防板坯表面纵向裂纹的产生。
According to the characteristics of longitudinal cracks on slab surface of R6-1000 continuous casting machine of Jinan Iron and Steel Company, the composition of steel, process operation, mechanical equipment and other aspects were analyzed. It was pointed out that the C content should be controlled to avoid the sub-peritectic steel range and the Mn content should be controlled in the upper limit ; Reasonable design immersion nozzle, the insertion depth control at 135 ± 5mm; using special mold flux to reduce the crack index; pull speed control at 0.82m / min, stable negative sliding time; control the MD inlet and outlet temperature difference at 7 ℃, can be prevented Slab surface longitudinal cracks.