【摘 要】
：
研究了锌铝硅合金ＺＡ２７Ｘ的组织性能及钠变质作用。通过理论分析和试验，发现和铝硅合金一样，锌铝硅合金中的初生硅经钠处理后可由块状变成球状，而共晶硅则以杆状在硅球上形成及生长。试
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研究了锌铝硅合金ＺＡ２７Ｘ的组织性能及钠变质作用。通过理论分析和试验，发现和铝硅合金一样，锌铝硅合金中的初生硅经钠处理后可由块状变成球状，而共晶硅则以杆状在硅球上形成及生长。试验表明，这种球硅增强的锌铝硅合金不仅具有好的耐磨性，而且还具有较高的耐温性
The microstructure and sodium modification of zinc-aluminum-silicon alloy ZA27X were studied. Through theoretical analysis and experiments, it is found that, like the Al-Si alloy, the primary Si in the Al-Si alloy can be changed into a spherical shape from a massive shape after being treated with sodium, while the eutectic Si forms and grows in a rod shape on the Si sphere. Experiments show that this ball silicon enhanced zinc-aluminum-silicon alloy not only has good wear resistance, but also has high temperature resistance
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