A deep understanding of the behavior of nonmetallic inclusions is essential for steel cleanliness control. The behavior of alumina inclusions at the liquid iron/argon gas interface is investigated using a high‐temperature confocal scanning laser microscope. The obtained images are used to determine the moving velocity of the inclusions on the interface. The obtained experimental data are quantitatively evaluated using the lateral capillary interaction model for multipole orders established by Danov–Kralchevsky while taking into account the resistive drag force. The attraction forces calculated from these data are in the range between ≈10−13 and ≈10−11 N. The best‐fitting model is assigned for each case. The multipole models almost counterbalance the drag force, indicating a good interpretation of the interaction between the inclusions. Moreover, the acting length of this interaction is examined and compared to the previous work on Ce2O3 inclusions. It is found that alumina inclusions generally exhibit a larger acting length at a large critical radius and a smaller acting length at a small critical radius when comparing them to their counterpart cerium oxide inclusions. Considering the particle shapes, high shape irregularity is better interpreted by higher orders of the multipoles.

中文翻译：

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液态铁/氩气界面处氧化铝夹杂物之间的相互作用：接触线波动的作用

深入了解非金属夹杂物的行为对于钢的洁净度控制至关重要。使用高温共焦扫描激光显微镜研究了液态铁/氩气界面处氧化铝夹杂物的行为。获得的图像用于确定界面上夹杂物的移动速度。使用 Danov-Kralchevsky 建立的多极级横向毛细管相互作用模型对获得的实验数据进行定量评估，同时考虑阻力阻力。根据这些数据计算出的吸引力在 ≈10 之间−13和 ≈10−11N. 为每种情况分配最佳拟合模型。多极模型几乎抵消了阻力，表明对夹杂物之间相互作用的良好解释。此外，还检查了这种相互作用的作用长度，并与之前关于 Ce 的工作进行了比较。2氧3夹杂物。研究发现，与对应的氧化铈夹杂物相比，氧化铝夹杂物通常在大临界半径处表现出较大的作用长度，在小临界半径处表现出较小的作用长度。考虑到颗粒形状，高形状不规则性可以通过更高阶的多极子更好地解释。