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采用粉末冶金液相烧结法制备了Fe-Al/Al原位复合材料,应用X射线衍射仪、扫描电镜、摩擦磨损试验机研究了烧结温度对Fe-Al/Al原位自生复合材料微观组织及耐磨性能的影响。结果表明:原位自生Fe3Al增强相的颗粒尺寸随着烧结温度的升高先减小后增大,硬度及耐磨性呈先上升后下降的趋势。当烧结温度为440℃时,短棒状Fe3Al增强颗粒数目最多,弥散分布在基体上。硬度达到63.3 HV,约为纯铝的2倍;磨损率达到0.73%,与纯铝相比降低了2.4倍,并且磨损形貌以磨粒磨损为主。
The in-situ Fe-Al / Al composites were prepared by powder metallurgy liquid-phase sintering method. The effects of sintering temperature on the microstructure of Fe-Al / Al in-situ composites and the microstructure of the in-situ composites were investigated by X-ray diffraction, scanning electron microscopy and friction and wear testing machines. Effect of wear resistance. The results show that the particle size of the in-situ Fe3Al reinforced phase first decreases and then increases with the increase of sintering temperature, and the hardness and wear resistance firstly increase and then decrease. When the sintering temperature is 440 ℃, the number of short rod-shaped Fe3Al particles increases and the dispersion distributes on the matrix. Hardness of 63.3 HV, about twice the pure aluminum; wear rate of 0.73%, compared with pure aluminum reduced by 2.4 times, and the wear morphology abrasive wear-based.