Chromium is normally added to liquid alloy in the form of different grades of ferrochromium (FeCr) alloys for the requirement of different alloy grades, such as stainless steels, high Cr cast iron, etc.. In this work, inclusions in two commercially produced alloys, i.e., high-carbon ferrochromium (HCFeCr) and low-carbon ferrochromium (LCFeCr) alloys, were investigated. The FeCr alloy/liquid iron interactions at an early stage were investigated by inserting solid alloy piece into contact with the liquid iron for a predetermined time using the liquid-metal-suction method. After quenching these samples, a diffusion zone between the alloys and the liquid Fe was studied based on the microstructural characterizations. It was observed that Cr-O-(Fe) inclusions were formed in the diffusion zone, FeO_x inclusions were formed in the bulk Fe, and an “inclusion-free” zone was detected between them. Moreover, it was found that the HCFeCr was slowly dissolved, but LCFeCr alloy was rapidly melted during the experiment. The dissolution and melting behaviors of these two FeCr alloys were compared and the mechanism of the early-stage dissolution process of FeCr alloys in the liquid Fe was proposed.

铬通常以不同牌号的铬铁（FeCr）合金的形式添加到液态合金中，以满足不同合金牌号的要求，如不锈钢、高铬铸铁等。在这项工作中，两种商业生产的合金中的夹杂物，即研究了高碳铬铁 (HCFeCr) 和低碳铬铁 (LCFeCr) 合金。通过使用液态金属抽吸法将固体合金片插入与液态铁接触预定时间，研究了早期的 FeCr 合金/液态铁相互作用。在对这些样品进行淬火后，基于显微结构特征研究了合金和液态铁之间的扩散区。观察到在扩散区形成了 Cr-O-(Fe) 夹杂物，FeO _x铁块中形成夹杂物，在它们之间检测到“无夹杂物”区。此外，发现HCFeCr缓慢溶解，而LCFeCr合金在实验过程中迅速熔化。比较了这两种FeCr合金的溶解和熔化行为，并提出了FeCr合金在液态Fe中早期溶解过程的机理。