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中心偏析和等轴晶率是评价连铸坯内部质量的重要参数,而用于改善内部质量的电磁搅拌、微合金化等技术相对复杂,实施成本高。通过对结晶器插入钢带,通过钢带的熔化吸热有效地降低结晶器内钢液过热度,可以提高铸坯内部质量。讨论了在给定工艺条件下钢带插入对连铸坯质量的影响。计算和生产试验结果表明,插入钢带可以明显降低钢水过热度;插入钢带的连铸坯疏松和等轴晶率等指标均比没有插钢带的连铸坯好,且吨钢插入钢带量增加可以增加等轴晶率,有利于改善钢坯内部质量。
Central segregation and equiaxed grain rate are important parameters for evaluating the internal quality of slab. The technologies such as electromagnetic stirring and micro-alloying to improve the internal quality are relatively complicated and the implementation cost is high. By inserting the mold into the steel strip, the melting endotherm of the steel strip effectively reduces the overheating degree of the molten steel in the mold and can improve the internal quality of the cast slab. The effect of steel strip insertion on the quality of continuous casting slab under given technological conditions is discussed. Calculation and production test results show that the insertion of steel strip can significantly reduce the degree of superheat molten steel; insert slab slab and equiaxed grain rate and other indicators are better than the continuous casting slab does not insert strip, and tons of steel into the strip Increasing the amount can increase the equiaxed grain rate, is conducive to improving the internal quality of the billet.