Effect of Final Electromagnetic Stirring Parameters on Central Cross-Sectional Carbon Concentration Distribution of High-Carbon Square Billet
Effect of Final Electromagnetic Stirring Parameters on Central Cross-Sectional Carbon Concentration Distribution of High-Carbon Square Billet
复制标题
最终电磁搅拌参数对高碳方坯中心截面碳浓度分布的影响
DOI：
10.3390/met9060665
复制
发表时间：
2019-06-01
期刊：
影响因子：
2.9
通讯作者：
Zhong, Wei
中科院分区：
文献类型：
--
作者：
Wan, Yong;Li, Menghua;Zhong, Wei
研究了电流强度从300A增加到400A，频率从4 Hz增加到12 Hz时，最终电磁搅拌参数对70钢方坯中心截面的电磁力和碳浓度分布的影响。在10组搅拌参数中，沿液心区中心线方向，电流强度为400A、频率为8 Hz时，距铸坯边缘48 mm处的电磁力最大。而沿液核区的对角方向，对角线中心附近的电磁力最大，电流强度为280A，频率为12 Hz时，电磁力最大。在电流强度为280A、频率为12赫兹的条件下，获得了使70钢铸坯中心截面碳浓度均匀、中心碳偏析最小的最佳电磁搅拌参数。在此搅拌参数下，铸坯中部碳浓度分别为0.66wt%、0.70wt%和0.74wt%的面积比分别达到28.5%、56.9%和10.9%。各采样点的碳分离指数均在0.92~1.05之间。
The effect of final electromagnetic stirring parameters, with current intensity increasing from 300 A to 400 A and frequency increasing from 4 Hz to 12 Hz, on the electromagnetic forces and carbon concentration distribution of the central cross section of a 70 steel square billet have been studied. Along the center line of the liquid core zone, current intensity of 400 A and frequency of 8 Hz achieve the maximum electromagnetic force at the position 48 mm away from the billet edge among the 10 groups of stirring parameters. Nevertheless, along diagonal of the liquid core zone, the electromagnetic force near the diagonal center is the greatest and the current intensity of 280 A and frequency of 12 Hz obtain the maximum electromagnetic force. The optimal final electromagnetic stirring (F-EMS) parameter to uniform the central cross-sectional carbon concentration and minimize the center carbon segregation of 70 steel billet was obtained with a current intensity of 280 A and frequency of 12 Hz. Under this stirring parameter, the area ratios of carbon concentrations of 0.66 wt%, 0.70 wt% and 0.74 wt% in the middle of the billet cross section reached 28.5%, 56.9% and 10.9%, respectively. Moreover, the carbon segregation indexes for all sampling points were in the range of 0.92–1.05.