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采用铸渗和热处理工艺相结合的方法,将纯铬丝与白口铸铁进行复合,原位生成(Fe,Cr)7C3颗粒束增强铁基复合材料。使用XRD和SEM对不同保温时间的该复合材料进行物相分析和微观组织观察。结果表明:颗粒束内的主要物相组成为α-Fe,γ-Fe和(Fe,Cr)7C3;随着保温时间的延长,(Fe,Cr)7C3颗粒束的面积逐渐增大,束内组织形态由共晶向亚共晶转变。
In this paper, pure chrome wire and white cast iron are compounded by casting infiltration and heat treatment. In-situ (Fe, Cr) 7C3 particle beam reinforced iron matrix composites are fabricated. XRD and SEM were used to analyze the phase and microstructure of the composites with different holding time. The results showed that the main phase composition in the particle beam was α-Fe, γ-Fe and (Fe, Cr) 7C3. With the increase of holding time, the area of (Fe, Cr) Morphology changes from eutectic to hypoeutectic.