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通过物理模拟实验研究板坯连铸流动控制结晶器(flow control moldⅡ,即FC MoldⅡ)电磁制动过程中,磁场强度和分布对结晶器内金属液流动的影响规律.实验中,以水银为模拟工质,在模型拉速为0.41,0.52和0.82 m/min(分别相当于生产拉速1.00,1.30和2.00 m/min),电磁制动的上区磁场强度B_1=0.18,0.36和0.50 T,下区磁场保持B_2=0.50 T不变的匹配(组合)条件下,考察结晶器(模型)内的水银流态和流速分布,并以此分析上、下区磁场强度匹配(组合)对水口出流、液面流动以及结晶器窄面模壁所受冲刷等的影响规律.结果表明,在上述拉速条件下,FC MoldⅡ电磁制动的上、下区磁场强度匹配关系,分别取B_1/B_2=0.36,0.72和1.00时,结晶器中金属液的制动效果最好.
The effects of magnetic field strength and distribution on the flow of molten metal in the mold during the electromagnetic braking of the flow control mold II (FC MoldⅡ) were studied through physical simulation experiments.In the experiment, mercury was used as a simulation Working medium, the pulling speed of the model was 0.41,0.52 and 0.82 m / min (corresponding to the production pulling speed 1.00, 1.30 and 2.00 m / min respectively). The upper magnetic field strength B_1 = 0.18, 0.36 and 0.50 T, Under the magnetic field of B_2 = 0.50 T invariant matching (combination), the mercury flow and velocity distribution in the mold (model) were investigated and the magnetic field strength of the upper and lower zones was matched (combined) Flow and liquid surface flow, as well as the erosion of the narrow mold wall of the mold, etc. The results show that under the conditions of the above-mentioned pulling speed, the matching of the magnetic field intensity of the upper and lower zones of the FC MoldⅡ electromagnetic brake is achieved respectively, and B_1 / B_2 = 0.36, 0.72 and 1.00, the mold metal liquid brake best.