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利用自耗电极直流电弧原位冶金的方法,获得了碳化钨增强铁基复合材料。采用SEM、EDS、XRD等研究了复合材料的组织,利用显微硬度计测试了其显微硬度。结果表明:W在富C的过热液相中混合扩散,发生原位冶金反应生成WCp。WCp和鱼骨状(Fe,W)6C组织弥散分布在由Fe、Cr、Ni、Mn、C等元素组成的粘结相中,这种强硬质相、辅助硬质相与基体的弥散分布和交叠组合是获得良好力学性能的基础。
The tungsten carbide reinforced iron matrix composites were obtained by means of in-situ metallurgy of consumable electrode DC arc. The microstructure of the composites was studied by SEM, EDS and XRD. The microhardness of the composites was tested by microhardness tester. The results show that W is mixed and diffused in supercritical liquid phase rich in C, and in situ metallurgy reaction takes place to form WCp. WCp and fishbone (Fe, W) 6C are dispersed in the binder phase composed of Fe, Cr, Ni, Mn, C and other elements, and the strong hard phase assists in the dispersion of the hard phase and the matrix And overlapping combinations are the basis for good mechanical properties.