Ti含量对热镀55wt.% Al-Zn镀层组织的影响

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (1): 8-14.

Ti含量对热镀55wt.% Al-Zn镀层组织的影响

张志坚^*1, 徐学明¹, 唐兴昌¹, 惠洋², 刘小华³, 李坤宇¹

1.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
2.嘉峪关市生产力促进中心, 甘肃嘉峪关 735100;
3.酒泉钢铁(集团)有限责任公司, 甘肃嘉峪关 735100

收稿日期:2025-02-09 出版日期:2026-02-28 发布日期:2026-03-05
通讯作者: 张志坚(1972-),男,甘肃武威人,副教授.Email:zhangzj412@lut.edu.cn
基金资助:
甘肃省联合科研基金重大项目(23JRRB0003),嘉峪关市重点研发计划(24-11)

Effect of Ti content on microstructure of hot-dip 55wt.% Al-Zn coating

ZHANG Zhi-jian¹, XU Xue-ming¹, TANG Xing-chang¹, HUI Yang², LIU Xiao-hua³, LI Kun-yu¹

1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology, Lanzhou 730050, China;
2. Jiayuguan Productivity Promotion Center, Jiayuguan 735000, China;
3. Jiuquan Iron and Steel Group, Jiayuguan 735000, China

Received:2025-02-09 Online:2026-02-28 Published:2026-03-05

摘要/Abstract

摘要： 为研究Ti对热镀55wt.% Al-Zn镀层组织的影响,通过配置不同Ti含量55wt.% Al-Zn热浸镀锌铝液对钢基板进行热浸镀实验,利用光学显微镜(OM)、扫描电镜(SEM)及能谱仪(EDS),对不同Ti含量铝锌镀层的表面、截面及过渡层组织进行分析.结果表明:不同Ti含量表面锌花组织结构基本一致,镀层表面锌花及合金层组织均由富Al相、富Zn相、富Si相及Al-Zn-Fe-Si化合物相构成;当Ti质量分数低于0.035%时,镀层锌花尺寸随Ti含量的增高而显著减小,含Ti镀层组织相对细小且致密;Ti的添加能够在镀液凝固过程中增加形核点,有助于锌花尺寸减小及细化镀层合金晶粒尺寸.

关键词: 铝锌镀层, Ti含量, 镀层组织, 锌花, 晶粒细化

Abstract: In order to study the effect of Ti content on the microstructure of hot-dip 55wt.% Al-Zn coating, hot-dip plating experiments were carried out on the aluminum-zinc substrate by configuring hot-dip galvanized aluminum liquid with different Ti contents. The surface, cross-section, and transition layer structure of aluminum-zinc coating with different Ti contents were analyzed by Optical Microscope(OM), Scanning Electron Microscope (SEM), and Energy Dispersive Spectrometer (EDS). The results showed that the microstructure of spangle on the surface of different Ti contents is basically the same, and the zinc spark and alloy layer on the surface of the coating are composed of Al-rich phase, Zn-rich phase, Si-rich phase, and Al-Zn-Fe-Si compound phase. When the Ti content is less than 0.035%, the size of the coating decreases significantly with the increase of Ti content, and the structure of the Ti-containing coating is relatively fine and dense. The addition of Ti increases the nucleation point during the solidification process of the plating solution, which is helpful to reduce the size of the spangle and refine the grain size of the coating alloy.

Key words: Al-Zn coating, Ti content, plating structure, spangle, grain refinement

中图分类号:

TG142.1

张志坚, 徐学明, 唐兴昌, 惠洋, 刘小华, 李坤宇. Ti含量对热镀55wt.% Al-Zn镀层组织的影响[J]. 兰州理工大学学报, 2026, 52(1): 8-14.

ZHANG Zhi-jian, XU Xue-ming, TANG Xing-chang, HUI Yang, LIU Xiao-hua, LI Kun-yu. Effect of Ti content on microstructure of hot-dip 55wt.% Al-Zn coating[J]. Journal of Lanzhou University of Technology, 2026, 52(1): 8-14.

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