Research on Microstructure of In-situ Production of (Fe,Cr)_7C_3 Particulate Bundles Reinforced Iron Matrix Composite
In-situ production of(Fe,Cr)7 C3 particulate bundles-reinforced iron matrix composite was prepared by infiltration casting between pure Cr wires and white cast iron plus subsequent heat treatment.The composite under different heat time was comparatively characterized by XRD and SEM.The results show that the particulates bundle mainly consist of α-Fe,γ-Fe and(Fe,Cr)7 C3 particulates.The area of particulates bundle gradually increases with the heat treatment time increasing.The microstructure morphology of particulates bundle transforms from eutectic into hypoeutectic.