中文摘要：

以Al-10Ti中间合金的形式将前元素加入到Super Dyma镀锌合金中，制备了Ti含量分别为0．1％，0．3％和0．5％（质量分数）的Super Dyma镀锌合金金相样品，采用扫描电子显微镜（SEM）研究了Ti元素添加量对Super Dyma镀锌合金凝固组织的影响，利用能谱仪（EDS）分析了Ti元素在这些镀锌合金组织中的分布规律，使用X射线衍射（XRD）分析了不同Ti含量的Super Dyma镀锌合金中的相组成，采用差热分析法（DTA）测定了不同Ti含量的Super Dyma镀锌合金中富铝相的开始凝固温度。实验结果表明，Super Dyma镀锌合金凝固组织由富Al相、富Zn相、MgZn2相以及Zn／Al／MgZn2三元共晶组织组成，Ti元素的加入使Super Dyma镀锌合金的起始凝固温度降低，使Super Dyma镀锌合金凝固组织中的富铝枝晶明显变细，MgZn2相的尺寸大幅减小，并使Zn／Al／MgZn2三元共晶组织得到细化。

英文摘要：

The Ti containing Super Dyma galvanized alloys were prepared by adding 0.1% , 0.3% and 0.5 %Ti into the alloy, respectively. Scanning electron microscopy （SEM） was used to study the effect of Ti addition on solidification structure of Super Dyma alloy, and X-ray diffraction （XRD） was used to analyze the phase composition of Super Dyma alloy with different Ti contents. Energy spectrometer （EDS） was used to study the distribution of Ti in the alloy samples. Differential thermal analysis （DTA） was carried out to determine the initial solidification temperature of Al-rich phase in the alloys. The results showed that the solidification structure of Super Dyma was composed of Al-rich phase, Zn-rich phase, MgZn2 phase and Zn/Al/MgZn2 ternary eutectic structure. The initial solidification temperature of Al-rich phase in Super Dyma alloy decreased because of the addition of Ti into the alloy. Besides, the Al- rich dendrites were obviously refined, the size of the MgZn2 phase was greatly reduced and the Zn/Al/MgZn2 ternary eutectic structure was significantly refined.