Ti/B对Zn-6Al-3Mg合金中Al枝晶的细化作用

doi:10.12066/j.issn.1007-2861.2684

上海大学学报(自然科学版) ›› 2025, Vol. 31 ›› Issue (4): 622-631.doi: 10.12066/j.issn.1007-2861.2684

Ti/B对Zn-6Al-3Mg合金中Al枝晶的细化作用

戴竞舸¹, 刘尧², 吴广新²

1. 宝山钢铁股份有限公司宝钢中央研究院, 上海 201900;
2. 上海大学材料科学与工程学院省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444

收稿日期:2025-02-24 出版日期:2025-08-31 发布日期:2025-09-16
通讯作者: 吴广新(1980—),男,研究员,博士,研究方向为先进高强钢表面涂镀. E-mail:gxwu@shu.edu.cn
基金资助:
上海市自然基金资助项目(21ZR1423600)

Refinement effect of Ti/B on Al dendrites in Zn-6Al-3Mg alloy

DAI Jingge¹, LIU Yao², WU Guangxin²

1. Baosteel Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China;
2. State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

Received:2025-02-24 Online:2025-08-31 Published:2025-09-16

摘要/Abstract

摘要： 为进一步改善Zn-6Al-3Mg (ZAM)合金的表面质量,提高其耐蚀性,研究了Ti或Ti/B添加对ZAM合金中Al枝晶的细化作用.结果显示:ZAM合金的Al枝晶为标准的二次枝晶形貌,但在添加了Ti或Ti/B后,Al相由二次枝晶、一次枝晶和轴状晶形貌组成;添加的Ti或Ti/B可有效细化Al枝晶,且ZAM-Ti/B合金的细化效果要优于ZAM-Ti合金.透射电子显微镜(transmission electron microscope,TEM)观察结果显示:Ti、B的添加会使ZAM合金中产生新的析出相TiAl$_{3}$和TiB$_{2}$;TiAl$_{3}$出现在Al枝晶的中心位置,TiB$_{2}$通常被MgZn$_{2}$相包围,从而有效细化了ZAM合金中的Al枝晶.

关键词: 镀层, 细化, TiAl$_{3}$/TiB$_{2}$

Abstract: To further improve the surface quality and enhance the corrosion resistance of Zn-6Al-3Mg (ZAM) alloy, the refinement effects of Ti or Ti/B additions on Al dendrites in ZAM alloy were investigated. The results showed that the Al dendrites in ZAM alloy exhibited a standard secondary dendritic morphology. However, after adding Ti or Ti/B, the Al phase consisted of secondary dendrites, primary dendrites, and axial crystal morphologies. Both Ti and Ti/B additions effectively refined the Al dendrites, with ZAM-Ti/B alloy demonstrating superior refinement compared to ZAM-Ti alloy. Transmission electron microscope (TEM) results revealed that Ti and B additions induced the formation of new precipitated phases, namely TiAl$_3$ and TiB$_2$ in ZAM alloy. TiAl$_3$ appeared at the center of Al dendrites, while TiB$_2$ was typically surrounded by MgZn$_2$ phases. These precipitated phases effectively refined the Al dendrites in ZAM alloy.

Key words: coating, refinement, TiAl$_{3}$/TiB$_{2}$

中图分类号:

TG178

戴竞舸, 刘尧, 吴广新. Ti/B对Zn-6Al-3Mg合金中Al枝晶的细化作用[J]. 上海大学学报(自然科学版), 2025, 31(4): 622-631.

DAI Jingge, LIU Yao, WU Guangxin. Refinement effect of Ti/B on Al dendrites in Zn-6Al-3Mg alloy[J]. Journal of Shanghai University（Natural Science Edition）, 2025, 31(4): 622-631.

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Ti/B对Zn-6Al-3Mg合金中Al枝晶的细化作用

Refinement effect of Ti/B on Al dendrites in Zn-6Al-3Mg alloy

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