Mg含量对1.6%Al锌铝镁合金镀层组织影响研究

金永清; 郭太雄; 董学强; 邓菡

doi:10.7513/j.issn.1004-7638.2022.05.028

Mg含量对1.6%Al锌铝镁合金镀层组织影响研究

doi: 10.7513/j.issn.1004-7638.2022.05.028

1.
攀钢集团攀枝花钢钒有限公司冷轧厂, 四川攀枝花 617000
2.
攀钢集团研究院有限公司, 四川攀枝花 617000

详细信息

作者简介:
金永清，1974年出生，男，四川攀枝花人，热处理高级工程师，研究方向为连续热镀锌及彩涂工艺技术管理，E-mail:980227506@qq.com

中图分类号: TF76，TG174.4
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- 文章访问数: 116
- HTML全文浏览量: 10
- PDF下载量: 28
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-28
- 刊出日期: 2022-11-01

The study of the role of Mg content in microstructure of Zn-1.6Al-xMg alloy coatings

1.
Cold Rolling Plant of Panzhihua Steel & Vanadium Co., Ltd, Panzhihua 617000, Sichuan, China
2.
Pangang Group Research Institute Co., Ltd, Panzhihua 617000, Sichuan, China

摘要

摘要: 利用热镀锌模拟机制备了Zn-1.6A1-1.3Mg、Zn-1.6A1-1.6Mg和Zn-1.6Al-2.0Mg热镀合金镀层钢板，并利用XRD、SEM和EDS对涂层的微观组织进行分析。结果表明，镀层由块状富Zn相、Zn/MgZn₂二元共晶组织、细小的Zn/Al/MgZn₂三元共晶组织和少量点状富Al相组成。随着Mg含量增加，镀层表面块状富Zn相的比例和尺寸减小，三元共晶组织减少，而二元共晶组织和条状富Al相的数量增多。在截面中，镀层的三元共晶组织随Mg含量升高而减少，二元共晶组织随Mg含量升高而增多。
- 锌铝镁镀层 /
- Mg含量 /
- 微观组织 /
- 共晶组织 /
- SEM
Abstract: The Zn-1.6Al-xMg alloy coating steel sheets with different Mg content were prepared by hot dip galvanizing simulator, and the microstructure of coatings was analyzed using XRD, SEM and EDS. The results indicate that all the microstructures of Zn-1.6Al-xMg coatings are composed of massive Zn-rich phases, Zn/MgZn₂ binary eutectic structures, fine Zn/Al/MgZn₂ ternary eutectic structures, and a few dotted Al-rich phases. However, the volume fraction of Zn-rich phases and ternary eutectic structures decreases with the increase in Mg content of coatings, while the volume fraction of binary eutectic structures increases. Furthermore, the dotted Al-rich phases gradually transform to banded structure. As for the cross section, the microstructure of coatings shows that the ternary eutectic structure decreases, while the binary eutectic structure increases with the increasing Mg content.
- Zn-Al-Mg alloy coatings /
- Mg content /
- microstructure /
- eutectic structures /
- SEM

HTML全文

图 1 热浸镀模拟机

Figure 1. Hot dip galvanizing simulator

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图 2 热浸镀锌铝镁试验工艺

Figure 2. Test process of Zn-Al-Mg hot dip galvanizing

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图 3 热浸镀锌铝镁合金镀层钢板试样

Figure 3. Zn-Al-Mg alloy hot dip galvanized steel plate sample

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图 4 Zn-1.6Al-1.6Mg 镀层表面XRD物相分析

Figure 4. XRD analysis of Zn-1.6Al-1.6Mg coating surface

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图 5 Zn-1.6Al-1.6Mg 镀层表面组织SEM 形貌及EDS 能谱分析

Figure 5. SEM and EDS analysis of Zn-1.6Al-1.6Mg coating

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图 6 Zn-1.6Al-1.6Mg 镀层截面组织 SEM 形貌及EDS 能谱分析

Figure 6. SEM and EDS analysis of cross-section of Zn-1.6Al-1.6Mg coating

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图 7 Mg含量对1.6%Al锌铝镁镀层表面组织的影响

Figure 7. Effect of Mg content on surface structure of 1.6%Al Zn-Al-Mg coating

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图 8 Mg含量对1.6%Al锌铝镁镀层截面组织的影响

Figure 8. Effect of Mg content on the section structure of 1.6% Al Zn-Al-Mg coating

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图 9 Zn-Al-Mg三元合金相图

Figure 9. Phase diagram of Zn-Al-Mg ternary alloy

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表 1 试验用锌铝镁镀液Al、Mg成分

Table 1. Composition of Al and Mg in Zn-Al-Mg coating solution for test

元素组成目标/% 实测/%
Al Mg Al Mg

Zn-1.6Al-1.3Mg 1.6 1.3 1.6 1.32
Zn-1.6Al-1.6Mg 1.6 1.6 1.58 1.59
Zn-1.6Al-2.0Mg 1.6 2 1.63 2.01

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