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采用搅拌熔铸法制备Al-Fe-Si/Al原位复合材料。利用X线衍射仪(XRD)、扫描电镜(SEM)、能谱分析(EDS)、光学显微镜、XHV-1000数字式显微硬度计、MFT-4000多功能材料表面性能试验仪研究Fe含量对原位复合材料的微观结构、硬度和耐磨性的影响。结果表明:Fe的质量分数为2%时原位复合材料的组织是以长针状的金属间化合物的β-Al5Fe Si为主,并含有少量Al0.3Fe3Si0.7;随着Fe含量的增加,原位复合材料中长针状的β-Al5Fe Si逐渐由长针状长大成粗棒状最后长大成块状;当Fe的质量分数为6%时,复合材料的硬度最高,为108.64HV,约为纯铝的3倍,约为ZL102的1.5倍;表面摩擦性能最佳,摩擦因数最小,为0.288。
Al-Fe-Si / Al in-situ composites were prepared by stirring casting method. The effect of Fe content on the surface of the matrix was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), optical microscope, XHV-1000 digital microhardness tester and MFT-4000 multifunctional material surface property tester. Bit composite material microstructure, hardness and wear resistance. The results show that the microstructure of the in-situ composites is predominantly β-Al5FeSi with long needle-like intermetallics and contains a small amount of Al0.3Fe3Si0.7 with the mass fraction of Fe being 2%. With the increase of Fe content, The long-acicular β-Al 5 Fe Si in the in-situ composites gradually grew into long lumps and grew into a massive rod. When the mass fraction of Fe was 6%, the hardness of the composites was the highest (108.64HV) Pure aluminum 3 times, about 1.5 times ZL102; surface friction best, the smallest friction factor, 0.288.