The efficiency of removal of solid alumina inclusions by filtration and the distribution of inclusions captured through the thickness of the filter was investigated for an aluminum killed 316 stainless steel casting. A mold design was developed using modeling software to produce two castings that fill simultaneously, one with a filter and the other without a filter. The design was optimized to produce the filtered casting and unfiltered casting from a single ladle pour, while also matching the fill rates and avoiding turbulence and reoxidation during pouring. Samples from the filters and the castings were analyzed using an SEM with EDS and automated feature analysis to measure the efficiency of inclusion removal for a 10 ppi zirconia foam filter. Results showed that inclusion removal efficiency depends strongly on the initial inclusion concentration and that the alumina inclusions are captured within the filter at the filter web-steel interface. This study also documented that inclusion floatation inside the mold cavity plays a role in reducing the inclusion concentration in the casting. The distribution of alumina inclusions captured through the filter thickness was quantified using elemental mapping and the inclusion distribution was found to decrease exponentially, following first-order capture kinetics.

对于铝镇静的316不锈钢铸件，研究了通过过滤去除固体氧化铝夹杂物的效率以及通过过滤器厚度捕获的夹杂物的分布。使用建模软件开发了模具设计，以生产两个可同时填充的铸件，一个带有过滤器，另一个不带有过滤器。该设计经过了优化，可以从一个钢包浇注中生产过滤铸件和未过滤铸件，同时还可以匹配填充率并避免浇铸过程中的湍流和再氧化。使用具有EDS的SEM和自动特征分析来分析来自过滤器和铸件的样品，以测量10 ppi氧化锆泡沫过滤器中夹杂物的去除效率。结果表明，夹杂物的去除效率在很大程度上取决于初始夹杂物的浓度，氧化铝夹杂物在滤网-钢界面处被捕集在过滤器内。这项研究还证明，模腔内部的夹杂物浮选在降低铸件中夹杂物浓度方面发挥了作用。使用元素映射对通过滤膜厚度捕获的氧化铝夹杂物的分布进行了定量，发现随着一阶捕获动力学，夹杂物的分布呈指数下降。