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| oscillation marks on continuously cast semifinished product; oscillation marks on strand (【技】结晶器振动在连铸坯表面产生的横向痕迹。振痕处易形成裂纹和成份偏析，并且随着振痕深度的增加而加重。因此减小振痕深度有利于改善铸坯表面质量。研究表明，振频高、振幅小、拉坯速度大、负滑脱时间短、保护渣黏度大及消耗量少，振痕深度就浅。同时，采用一些新型结晶器，例如钻石形结晶器、曲面结晶器、抛物线结晶器等，也有利于减小振痕深度。) | |||
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