The inclusion characteristics in extra low-carbon ferromanganese (ELC-FeMn), low-carbon ferromanganese (LC-FeMn), mid-carbon ferromanganese (MC-FeMn), and high-carbon ferromanganese (HC-FeMn) were evaluated by scanning electron microscopy coupled with energy dispersive spectroscopy. The effect of FeMn alloys on the cleanliness of transformation-induced plasticity (TRIP) steel was studied based on laboratory-scale experiments and thermodynamic calculations. The results show that the main inclusions in ELC-FeMn are MnO–MnS and MnS, and the dominant inclusions in LC-FeMn and MC-FeMn are MnO, MnO–SiO₂, and MnO–SiO₂–MnS. The inclusions in HC-FeMn are diversified. Besides MnO–SiO₂ inclusion, a certain number of Al-, Si-, and Ti-containing inclusions and enrichment phases of Pb, Sn, and P are observed in HC-FeMn. Before FeMn alloy addition, the main inclusion in steel is Al₂O₃. After alloying with the four different grades of FeMn alloy, the main inclusions in TRIP steel are Al₂O₃, AlN, MnS, Al₂O₃–AlN, AlN–MnS, and Al₂O₃–MnS. The MnO and SiO₂ inclusions from FeMn alloys are not detected in TRIP steel.

采用扫描电子对超低碳锰铁（ELC-FeMn）、低碳锰铁（LC-FeMn）、中碳锰铁（MC-FeMn）和高碳锰铁（HC-FeMn）的夹杂物特性进行评价显微镜与能量色散光谱相结合。基于实验室规模的实验和热力学计算，研究了 FeMn 合金对相变诱发塑性 (TRIP) 钢清洁度的影响。结果表明，ELC-FeMn中的主要夹杂物为MnO-MnS和MnS，LC-FeMn和MC-FeMn中的主要夹杂物为MnO、MnO-SiO ₂和MnO-SiO ₂ -MnS。HC-FeMn中的夹杂物是多样化的。除了 MnO-SiO ₂在 HC-FeMn 中观察到一定数量的 Al、Si 和 Ti 夹杂物和 Pb、Sn 和 P 的富集相。在添加FeMn合金之前，钢中的主要夹杂物是Al ₂ O ₃。与四种不同牌号的FeMn合金合金化后，TRIP钢中的主要夹杂物为Al ₂ O ₃、AlN、MnS、Al ₂ O ₃ -AlN、AlN-MnS和Al ₂ O ₃ -MnS。在 TRIP 钢中未检测到来自 FeMn 合金的 MnO 和 SiO _{2夹杂物。}