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以金属钨丝网和灰口铸铁为原材料,采用离心铸造技术,通过调整钨丝的中心间距和灰口铸铁熔体的浇铸温度,原位合成WC颗粒增强铁基复合材料。利用XRD、SEM以及两体销盘磨损试验机对所得复合材料复合区的物相种类、显微组织以及磨损性能进行分析研究,结果表明:随浇铸温度的提高,WC衍射峰的强度增强,反应程度增大,WC量不断增多。当钨丝中心间距为0.5 mm,浇铸温度为1400℃时,得到较理想的WC颗粒弥散分布于铁基体中的复合材料;在浇铸温度不变时,随中心距的增大,复合材料的磨损率呈现出先降低后略微升高的趋势。
In this paper, tungsten carbide wire and gray cast iron were used as raw materials, centrifugal casting technology was adopted to adjust the center distance of tungsten wire and the casting temperature of gray cast iron melt to synthesize in situ WC particle reinforced iron matrix composites. The phase composition, microstructure and wear properties of the composites were analyzed by XRD, SEM and two-component pin-plate wear tester. The results show that the intensity of WC diffraction peak increases with the increase of casting temperature, The degree of increase, the WC volume continues to increase. When the center distance of tungsten filament is 0.5 mm and the casting temperature is 1400 ℃, the ideal composite material with dispersed WC particles dispersed in the iron matrix is obtained. When the casting temperature is constant, with the increase of the center distance, the wear of the composite Rate showed a slight decrease after the first increase in the trend.