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基于ProCast的元胞自动机(Cellular Automaton)-有限元(Finite Element)模型,以Si含量为6.5%的高硅电工钢为研究对象,建立了双辊薄带铸轧凝固组织演变模型,探讨了过热度、铸轧速度、铸辊表面与钢液间的传热系数等因素对薄板凝固组织的影响。结果表明,浇注温度越高,晶粒尺寸越大,柱状晶比例也越大。钢液浇注过热度过高,会使凝固区变小,有漏钢的危险。钢液浇注温度过低,凝固区域变厚,容易导致铸轧事故。随着铸轧速度提高,晶粒尺寸减小,柱状晶比例也减小。铸轧速度过低或过高,均容易导致铸轧事故。晶粒尺寸随着传热系数的增大而增大,柱状晶比例也随着传热系数的增大而增大。
Based on ProCast’s Cellular Automaton-Finite Element model, the evolution model of twin-roll strip cast-rolling solidification microstructure was studied with high-silicon electrical steel with 6.5% Si content. Superheat, casting speed, heat transfer coefficient between casting roll surface and molten steel and other factors on the microstructure of the sheet. The results show that the higher the pouring temperature, the larger the grain size, the larger the columnar crystal ratio. Overheating molten steel is too high, will make the freezing area smaller, there is danger of breakout. Molten steel pouring temperature is too low, thickening of the solidified area, easily lead to casting accidents. With the casting speed increases, the grain size decreases, the columnar crystal ratio also decreases. Casting speed is too low or too high, are easily lead to casting accidents. The grain size increases with the increase of heat transfer coefficient, and the proportion of columnar crystals also increases with the increase of heat transfer coefficient.