Abstract An as-cast chromium white cast iron alloy with chromium (Cr) content of 0 wt%, 1 wt%, 2 wt%, 3 wt%, and 4 wt% was prepared via metallurgical smelting and casting processes. The effects of Cr content on the toughness, hardness, and microstructure of (Fe, Cr)3C carbides was evaluated. The results revealed that the microstructure of the as-cast alloys is mainly composed of bulk carbide and the pearlite matrix. The carbide in the alloy without added Cr, i.e., eutectic Fe3C, was characterized by a continuous network structure. With the addition of Cr atoms, the Fe3C-type carbide was transformed into (Fe, Cr)3C, leading to a gradual increase in the fracture toughness of the carbide. This may have resulted from the incorporation of Cr into Fe3C and the consequent crystal-structure transformation of the carbide. When the Cr content of the carbide was lower than the saturation level (

中文翻译：

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铬诱导(Fe, Cr)3C韧性提高对白口铸铁双体磨粒磨损行为的影响

摘要 通过冶金冶炼和铸造工艺制备了铬 (Cr) 含量为 0 wt%、1 wt%、2 wt%、3 wt% 和 4 wt% 的铸态铬白口铸铁合金。评估了 Cr 含量对 (Fe, Cr)3C 碳化物的韧性、硬度和微观结构的影响。结果表明，铸态合金的显微组织主要由块状碳化物和珠光体基体组成。未添加Cr合金中的碳化物，即共晶Fe3C，具有连续的网络结构特征。随着 Cr 原子的加入，Fe3C 型碳化物转变为 (Fe, Cr)3C，导致碳化物的断裂韧性逐渐增加。这可能是由于将 Cr 掺入 Fe3C 以及随之而来的碳化物晶体结构转变造成的。