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针对连铸过程中水口吹Ar工艺导致的铸坯缺陷,利用Cu质水冷插针进行物理模拟实验,研究了气泡在连铸坯固/液界面处的运动行为.通过观察气泡在固/液界面的运动行为,研究气泡被铸坯捕获机理.同时,对现场铸坯进行了取样分析,发现弯月面处生长的枝晶是气泡被凝固坯壳捕获的一个重要因素,进而提出生产中采用水口电磁制动和结晶器窄面处电磁搅拌的方法来改善铸坯质量,减少气泡凝入铸坯.
Aiming at the defect of casting billet caused by blowing Ar process during the process of continuous casting, physical simulation experiments were conducted by using Cu water-cooled pin to study the moving behavior of air bubbles at solid / liquid interface of continuous casting slab. , And the bubble trapping mechanism was studied.At the same time, the slab samples were analyzed by sampling and found that the dendrite grown on the meniscus was an important factor for the capture of the bubbles by the solidified shell, and then put forward that using the nozzle Electromagnetic brake and mold narrow surface electromagnetic stirring method to improve the quality of slab, reducing the air bubbles into the slab.