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为了改善锌铝合金在干摩擦条件下的耐磨性能,拓宽它的工程应用范围,在其中添加质量分数为10%的Si,同时以质量分数0.1%~0.3%的P-Cu对硅相进行变质处理,研制出硅相增强锌基复合材料,并且对这种材料的减摩抗磨性能进行了试验研究.结果表明:硅相锌基复合材料分别在干摩擦和20#机械油滴油润滑条件下的减摩抗磨性能良好.扫描电子显微镜观察发现,硅相锌基复合材料中的硅相经变质处理得以细化和分布均匀化,这对改善锌铝合金的综合性能具有重要作用;由于硅相的硬度远比基体的高,在滑动摩擦过程中可以起支撑作用,减少偶件与基体的直接接触而降低摩擦磨损
In order to improve the wear resistance of zinc-aluminum alloy under dry friction condition and broaden its engineering application range, add Si (mass fraction 10%), P-Cu of 0.1% -0.3% The metamorphic treatment of the silicon phase, the development of silicon-enhanced zinc matrix composites, and the friction and wear resistance of this material were tested. The results show that the antifriction and antiwear properties of silicon-based zinc matrix composites under dry friction and 20 # mechanical oil drop lubrication are good respectively. Scanning electron microscopy showed that the silicon phase in the silicon-based zinc-based composites was refined and homogenized by modification, which played an important role in improving the overall properties of the zinc-aluminum alloy. Because the hardness of the silicon phase is much higher than that of the matrix , In the process of sliding friction can play a supporting role, reducing the direct contact with the substrate and reduce the friction and wear