Simulation of Secondary Dendritic Arm Spacing of Free Cutting Steel 38MnVS

• Published in: Journal of iron and steel research, international international, 2011-06, Vol.18 (6), p.54-60
• Main Authors: XIA, Yun-jin, WANG, Fu-ming, WANG, Jin-long
• Format: Article
• Language: English
• Subjects: Applied and Technical Physics; Computer simulation; Continuous casting; Cutting; Engineering; interdendritic segregation; Iron and steel industry; Iron and steel making; Machines; Manufacturing; Materials Engineering; Materials Science; Mathematical models; Metallic Materials; MiLE method; permeability; Physical Chemistry; Processes; secondary dendritic arm spacing; Segregations; Steels; 二次枝晶臂间距; 拉格朗日; 数值模拟; 易切削钢; 枝晶偏析; 欧拉方法; 连铸过程; 铸造速度
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(11)60078-2

The secondary dendritic arm spacing (SDAS) of free cutting steel 38MnVS during continuous casting process was simulated based on a Mixed Lagrangian and Eulerian Method (MiLE Method) and SDAS model. The simulation results are basically in agreement with measured ones. The effect of composition, superheat and casting speed on SDAS are studied, and the relationship between SDAS and interdendritic segregation is discussed. The results show that SDAS increases with increasing carbon and silicon content, and decreases with increasing manganese and sulfur content. The increase of superheat and casting speed also makes SDAS increase. The permeability of columnar mushy zone which is parallel to the primary dendritic arms is calculated based on Carman-Kozeny relationship, and the increase of SDAS makes the permeability increase, which exacerbates interdendritic segregation of columnar crystal zone.