通过有限元数值模拟，讨论了两段式结晶器上半段长度、感应线圈的位置、液面位置对结晶器内部磁场的影响规律，并深入分析了两段式结晶器整个系统的电磁场分布规律。结果表明：两段式结晶器上半段越长，其透磁效果越好；线圈位置越靠上，结晶器透磁效果越好；液面位于线圈中心偏上20 mm时，内部磁场的作用效果最佳。在本研究条件下，两段式结晶器透磁效果良好，磁感应强度主要集中在结晶器上半段钢液弯月面区域。纵向磁场在结晶器上半段高度范围内逐渐增强，在结晶器下半段高度范围迅速衰减；周向磁场在钢液表面均匀分布；径向磁场由钢液表面向内部逐渐衰减。通过两段式结晶器与切缝式结晶器的比较发现，两段式结晶器内部磁场分布更均匀，易于在生产中实现。
Some parameters such as length of the top half of mold, coil location and meniscus level in the two-stage slitless soft contact mold were analyzed through the 3-D FEM numerical simulation method. The distribution of electromagnetic field in the whole two-stage slitless mold system was also studied. Magnetic flux density in mold increased with the length of the top half increasing. Coil should be placed near the top of mold to increase the magnetic field. Initial meniscus level should be controlled between the center and the top of coil to obtain the ideal soft contact effect. The alternating magnetic field could penetrate mold wall then impose on metal strand under the given conditions in this research. Magnetic field on vertical direction mainly acted on metal strand meniscus location. The magnetic flux density increased in the top half of mold, but decreased greatly in the down half of mold. The uniformity of magnetic flux density was good in circumferential direction and degenerate to boundary in radical direction. The magnetic field in the two-stage mold was more uniform than that in the slit mold, as was better for industry use.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%