ABSTRACT The paper concerns double high-zinc aluminium alloys inoculated with master alloys containing titan and comprises research on the influence of inoculation on grain refinement. Most aluminium alloys before being cast have relatively low strength properties and therefore a series of treatments are applied in order to improve these properties. One of the treatments is the grain fragmentation process, called grain refinement treatment that allows to improve material properties of alloy, improve the feeding properties during the casting solidification, as well as to obtain more robust machinability of casting. Al alloy with 20wt% Zn (AlZn20) was tested, inoculated with the addition of traditional master alloy AlTi3C0.15 before casting to the sand mould. The results obtained during the studies show nucleating activity of the master alloy, proved by reduced overcooling and recalescence on cooling curves. Additionally, the role of titanium in this process is explained.

中文翻译：

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含钛中间合金对高锌铝合金的晶粒细化效率分析

摘要 本文涉及用含钛母合金孕育的双高锌铝合金，研究孕育对晶粒细化的影响。大多数铸造前的铝合金具有相对较低的强度特性，因此应用了一系列处理以改善这些特性。其中一种处理是晶粒破碎工艺，称为晶粒细化处理，可以改善合金的材料性能，改善铸件凝固过程中的补料性能，以及获得更坚固的铸件机械加工性能。测试了含 20wt% Zn 的铝合金 (AlZn20)，在浇铸到砂模之前添加了传统的中间合金 AlTi3C0.15。研究期间获得的结果表明母合金的成核活性，通过减少冷却曲线上的过冷和再辉来证明。此外，还解释了钛在此过程中的作用。