Formation behavior of Fe–Zn intermetallic layers at the interface between Fe–Mn and pure Zn melt at 460°C

IF 1.6 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Isij International Pub Date : 2024-06-05 DOI:10.2355/isijinternational.isijint-2024-096
Suzue Yoneda, Naoki Takata
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Abstract

The effect of Mn on the alloying reaction during hot-dip galvanization was investigated. The microstructure of the Fe–Zn intermetallic layers consisted of ζ, δ, and Γ phases for both pure Fe and Fe–2Mn (wt.%) alloy. The intermetallic layers grew thicker with increasing dipping time, and the growth rate of each layer was similar for both substrates. In the case of Fe–2Mn, the formation of the δ1p phase was observed after dipping for 2 s. However, δ1p formation was delayed for pure Fe, indicating that Mn may promote nucleation of the δ1p phase. It is known that the δ1p phase nucleates in the Fe-saturated ζ phase. The Fe content at the ζ/δ1p interface was found to be lower for the Fe–2Mn alloy by electron probe microanalysis, suggesting that the supersaturation of Fe for the nucleation of δ1p is decreased by Mn addition and Mn may stabilize the δ1p phase. Once δ1p became a continuous layer, the growth rates of the δ1p layer on pure Fe and Fe–2Mn were similar. Mn could affect only the nucleation of δ1p during the initial stage of the alloying reaction.

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460°C 时铁-锰和纯锌熔体界面上铁-锌金属间层的形成行为
研究了锰对热浸镀锌过程中合金化反应的影响。在纯铁和 Fe-2Mn (wt.%) 合金中,铁-锌金属间层的微观结构由 ζ、δ 和 Γ 相组成。金属间层随着浸渍时间的增加而变厚,两种基底的金属间层的生长速度相似。在铁-2Mn 的情况下,浸渍 2 秒后即可观察到 δ1p 相的形成。然而,纯铁的 δ1p 形成延迟,这表明锰可能会促进 δ1p 相的成核。众所周知,δ1p 相在铁饱和的 ζ 相中成核。通过电子探针显微分析发现,Fe-2Mn 合金的 ζ/δ1p 界面的铁含量较低,这表明加入 Mn 后,δ1p 成核的铁过饱和程度降低,Mn 可能会稳定δ1p 相。一旦δ1p 成为一个连续的层,纯铁和 Fe-2Mn 上的δ1p 层的生长速度相似。在合金化反应的初始阶段,锰只能影响δ1p 的成核。
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来源期刊
Isij International
Isij International 工程技术-冶金工程
CiteScore
3.40
自引率
16.70%
发文量
268
审稿时长
2.6 months
期刊介绍: The journal provides an international medium for the publication of fundamental and technological aspects of the properties, structure, characterization and modeling, processing, fabrication, and environmental issues of iron and steel, along with related engineering materials.
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