结晶器正弦振动模式下,250 mm厚连铸坯振痕深度较深,通过试验3种非正弦振动模式找出了最优的非正弦振动参数.优化后的非正弦振动方式下铸坯振痕深度最小为0.16 mm;碳含量主要通过影响钢的高温强度来影响振痕的深度;随着铸坯拉速的提高,振痕有减轻的趋势;结晶器振动方式和参数的选取要综合考虑保护渣消耗等因素.
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