Effect of Interfacial Properties on the Agglomeration Characteristics of Inclusions in High‐Manganese and High‐ Aluminum Steels

The product quality of high‐manganese and high‐aluminum steels is closely related to the agglomeration behavior of inclusions. The study first establishes a 3D stability phase diagram of inclusions in high‐manganese and high‐aluminum steels. Based on that, laboratory‐scale experiments with different Mn and Al contents are designed to prepare different inclusions. Furthermore, the change in interfacial properties including contact angle of inclusions and surface tension of molten steel with various Mn and Al contents is evaluated. On this basis, the effect of different steel compositions on the agglomeration characteristics of inclusions is investigated. As Mn content increases, the cavity bridge force between inclusions weakens. As Al content increases, the cavity bridge force of Al 2 O 3 inclusions first increases and then decreases, and the cavity bridge force of AlN decreases. When the Al content is more than 1.58 wt% and <2.46 wt%, as the Mn content increases, the cavity bridge force of Al 2 O 3 inclusions gradually decreases to less than that of AlN. The critical Mn and Al content relationship for changing the order of cavity bridge forces on inclusions is . The study can provide support for inclusion control in high‐manganese and high‐aluminum steel.