Ti对Super Dyma镀锌合金凝固组织的影响

发布时间：2018-04-15 01:09

本文选题：Super + Dyma镀锌合金　；参考：《稀有金属》2016年11期

【摘要】：以Al-10Ti中间合金的形式将Ti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、MgZn_2相以及Zn/Al/MgZn_2三元共晶组织组成,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,MgZn_2相的尺寸大幅减小,并使Zn/Al/MgZn_2三元共晶组织得到细化。
[Abstract]:In the form of Al-10Ti master alloy, Ti element was added to Super Dyma galvanized alloy. The samples of Super Dyma galvanized alloy with Ti content of 0.1% and 0.5% (mass fraction) were prepared, respectively.The effect of Ti addition on solidification microstructure of Super Dyma galvanized alloy was studied by means of scanning electron microscope (SEM). The distribution of Ti element in the structure of Super Dyma galvanized alloy was analyzed by means of energy dispersive spectroscopy (EDS).The phase composition of Super Dyma galvanized alloy with different Ti content was analyzed by X-ray diffraction (XRD). The initial solidification temperature of Al-rich phase in Super Dyma zinc-plating alloy with different Ti content was measured by differential thermal analysis (DTA).The experimental results show that the initial solidification temperature of Super Dyma galvanized alloy decreases with the addition of Al rich phase, Zn rich phase MgZn2 phase and Zn/Al/MgZn_2 ternary eutectic structure.The Aluminum-rich dendrites in the solidified microstructure of Super Dyma galvanized alloy were obviously finer and the size of MgZn2 phase was greatly reduced, and the ternary eutectic structure of Zn/Al/MgZn_2 was refined.
【作者单位】：常州大学江苏省光伏科学与工程协同创新中心江苏省材料表面科学与技术重点实验室;
【基金】：国家自然科学基金项目(51271041) 常州市工业支撑项目(CE20130085)资助
【分类号】：TG174.44

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