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研究了3种加钛方式(添加低钛铝合金,铝钛中间合金和氟盐)对Zn-Al合金组织及性能的影响。结果表明,铸造过程中添加钛能有效地细化Zn-Al合金组织,其中低钛铝合金的细化效果最好。分析认为,其原因可能是由于在强大电磁场的搅拌作用下,Ti原子的均匀分布以及原位析出的异质形核质点的形核作用所致。由于晶粒的细化,增加了晶界面积,更有效地抑制了位错的通过,从而增强了基体的结合力。因而电解添加低钛铝合金的Zn-Al合金具有最高的力学性能和耐摩擦磨损性能。
The effects of three methods of adding titanium (adding low titanium aluminum alloy, aluminum titanium intermediate alloy and fluorine salt) on the microstructure and properties of Zn-Al alloy were studied. The results show that the addition of titanium can effectively refine the Zn-Al alloy structure during casting, among which the refining effect of low-Ti-Al alloy is the best. The analysis shows that the reason may be due to the uniform distribution of Ti atoms and the nucleation of heterogeneous nucleation sites precipitated in situ under the agitation of a strong electromagnetic field. As the grain refinement, an increase of the grain boundary area, more effectively inhibit the dislocation of the pass, thereby enhancing the binding force of the substrate. As a result, Zn-Al alloys electrolytically added with low Ti-Al alloy have the highest mechanical properties and wear-resistant properties.