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针对薄带铸轧过程冷却速率大的特点 ,采用微观偏析模型对碳钢在薄带铸轧过程中溶质元素的微观偏析进行了模拟 ,通过模拟给出了铸轧凝固过程中固相率随温度的变化规律 ,固相率仅在很窄的温度范围内迅速增加·同时给出了冷却速率对溶质元素偏析的影响规律 ,随冷却速率的增加 ,溶质元素晶间偏析增大 ,而晶内偏析较小·在此基础上给出了碳钢薄带双辊铸轧过程中凝固终了温度值 ,为确定铸带凝固终了点的位置及铸轧过程的稳定性提供了有效的数据 ,为铸轧薄带的质量分析提供了理论依据·
In view of the large cooling rate in the process of strip casting and rolling, the microsegregation model was used to simulate the micro-segregation of solute elements in the process of strip casting with carbon steel. The relationship between the solid fraction and temperature The rate of solid phase increases rapidly only in a very narrow temperature range. Meanwhile, the influence of cooling rate on the segregation of solute elements is given. With the increase of cooling rate, the intergranular segregation of solute elements increases, while the intragranular segregation Smaller · On this basis, given carbon steel strip twin-roll casting process of solidification end temperature value, in order to determine the solidification of the solidification point of the end position and the stability of the casting process provides effective data for the casting and rolling The quality analysis of the strip provides the theoretical basis