电渣重熔1Mn18Cr18N护环钢补缩过程的温度变化规律

以电渣重熔准稳态过程的温度场为初始条件,采用ANSYS与CFX商业软件相结合的方法,研究分析了电渣重熔补缩过程中的温度分布,考察了无补缩操作、直线降流方式和阶梯降流方式三种条件下电渣锭热节的最终位置.结果表明:在无补缩操作条件下,电渣锭热节附近糊状区离渣-金界面的最远距离为162 mm,直线降流方式距离为130 mm,大阶梯降流方式距离为70 mm,而小阶梯降流方式的热节位置几乎保持不变.因此,阶梯降流方式更有利于1Mn18Cr18N护环钢电渣重熔补缩工艺的顺利进行.

Temperature Revolution During Feeding Process in ESR of 1Mn18Cr18N

The temperature field at quasi steady state of electro slag remelting (ESR) was taken as initial condition in the simulation of temperature distribution during ESR in virtue of ANSYS and CFX. Terminal positions of hot spots in the ingot under three feeding conditions (i.e. no feeding， linear current-drop and stair-step current-drop during feeding) were investigated. The results showed that the largest distance of mushy zone around the hot spot were 162mm， 130mm and 70mm away from slag-metal interface， when no feeding， linear current-drop and rapid stair-step current-drop were carried out during ESR feeding process， respectively. The hot spot remained changeless under slow stair-step current-drop. Thus， stair-step current-drop is beneficial for feeding process during ESR of 1Mn18Cr18N.