添加Ti和Al对热浸镀锌层组织结构的影响  

Effect of Ti and Al addition on microstructure of hot-dip zinc coating

作　　者：王胜民[1] 黄国雄[2] 何明奕[2] 赵晓军[2] 陈华[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500 [2]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《材料热处理学报》2013年第8期158-162,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(51161010);云南省教育厅重点基金(2010Z018);云南省自然科学基金(2011FZ053)

摘　　要：制备了Ti、Al含量不同的热浸镀锌层,利用扫描电子显微镜(SEM)和能谱仪(EDS)观察分析了镀层的组织结构。结果表明:Ti能有效抑制镀层中ζ相的生长,降低合金相层的厚度。60 s浸镀,添加0.04%Ti时消除了镀层中ζ相分层现象;添加0.07%Ti时在ζ/η相界生成细小颗粒状T相;240 s浸镀,在ζ/η界面及η相中生成了颗粒状T相,甚至形成连续分布的T相小岛。锌浴中同时添加Ti和Al对Fe-Zn合金相生长的抑制作用加剧,短时间浸镀时就促使含铝T相在η相中生成。In order to study the effect of addition of Ti and A1 on microstructure of hot-dip zinc coatings, the Zn-Ti-AI alloy coatings were galvanized by hot-dip method in zinc baths containing different amounts of aluminum and titanium. The coatings were examined with a scanning electron microscope（SEM） equipped with a EDS analyzer. The results indicate that the addition of small amounts of Ti to the molten zinc galvanizing bath could effectively suppress the growth of ζ phase in the coatings. While dipping in the zinc bath containing 0.04% Ti for 60 s, the lamination of ζ phase can be eliminated,and a fine ternary phase T forms at the interface between ζ layer and Zn overlay when dipping in the zinc bath containing 0. 07% for 60 s. While dipping in the zinc bath for 240 s, the granular T phase or the T phase islet are found at ζ/η interface or in 11 phase region. The co-addition of Ti and A1 shows a strengthened inhibition of Fe-Zn alloy layer growth, and promotes the formation of T phase containing A1 in short dipping time in η phase.

关 键 词：Zn-Ti-Al合金 Zn合金镀层 热浸镀 组织结构 

分 类 号：TG174.44[金属学及工艺—金属表面处理]