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采用铸造和热处理相结合的工艺,使钛丝与灰铸铁原位合成TiC颗粒增强铁基复合材料。用SEM、XRD对复合材料的显微组织和物相组成进行分析,并对复合材料在不同热处理时间的耐磨性能进行测试。结果表明:复合材料相组成为TiC和α-Fe;TiC颗粒尺寸在2-5μm之间,形态呈近四方状或近球状;保温12h的复合材料耐磨性最好,相对耐磨性为5.26;主要的磨损机理为显微犁削机制。
Casting and heat treatment using a combination of technology, titanium wire and gray cast iron in situ synthesis TiC particles reinforced iron-based composite materials. The microstructure and phase composition of the composites were analyzed by SEM and XRD, and the wear resistance of the composites at different heat treatment time was tested. The results show that the phase composition of the composites is TiC and α-Fe. The grain size of TiC ranges from 2μm to 5μm. The morphology of the composites is almost square or nearly spherical. The wear resistance of the composites is the best, with a relative wear resistance of 5.26 The main wear mechanism is micro-plowing mechanism.