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首页> 外文期刊>ISIJ international >Enhanced Interfacial Reaction of Fe–Si Alloy Sheets Hot-Dipped in Zn Melt at 460°C
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Enhanced Interfacial Reaction of Fe–Si Alloy Sheets Hot-Dipped in Zn Melt at 460°C

机译：460°C时热浸在锌熔体中的铁硅合金板的界面反应增强

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摘要

In order to understand the effect of solute Si (in the steel sheet) on the interfacial reaction between liquid Zn and solid Fe (α -Fe phase) during the hot-dip galvanizing process, a change in the interfacial microstructure between Zn coating and Fe substrate in Fe–Si alloy sheets hot-dipped in Zn melt with dipping time at 460°C was examined. In pure Fe sheet, the Fe–Zn intermetallic layers form at the interface between solid Fe and liquid Zn at an early stage of dipping and subsequently grow to approximately 60 μ m in thickness after 600 s. In Fe–1Si (wt%) alloy, the thickness of Zn coating substantially increases to beyond 500 μ m after 600 s and the coarse ζ -FeZn_(13) phase with several facet planes was often observed in the Zn coating. The thickness of the Fe–1Si alloy sheets continuously decreases till 60 s and then is reduced significantly after 600 s. The thickness loss in the later stage of dipping is more significant in the Fe–Si alloy with higher Si content. These results indicate a significant Fe dissolution into liquid Zn could occur at the later stage of dipping the Fe–1Si alloy in Zn melt, which is distinguished from the interfacial reaction between pure Fe and liquid Zn. The enhanced interfacial reaction would be responsible for the decomposition of the initially formed ζ -FeZn_(13) phase layer to liquid and FeSi phases, which can be proposed based on thermodynamic calculations of the Fe–Zn–Si ternary system.
机译：为了了解溶质Si（钢板中）对热浸镀锌过程中液态Zn和固态Fe（i-α-Fe相）界面反应的影响，Zn之间的界面微观结构发生了变化检查了在460°C下浸渍时间热浸在Zn熔体中的Fe-Si合金薄板中的镀层和Fe基体。在纯铁片中，在浸入的早期阶段，在固态铁和液态锌之间的界面处会形成铁锌金属间层，然后在600 s后厚度增长到约60μm。在Fe-1Si（wt％）合金中，经过600 s后，Zn涂层的厚度显着增加到500μm以上，并且经常观察到具有几个小平面的粗ζ-FeZn_（13）相。锌涂层。 Fe-1Si合金板的厚度连续减小直至60 s，然后在600 s后显着减小。硅含量较高的Fe-Si合金在浸入后期的厚度损失更为明显。这些结果表明，在将Fe-1Si合金浸入锌熔体的后期，可能会发生大量的Fe溶解到液态Zn中的现象，这与纯Fe和液态Zn的界面反应不同。增强的界面反应将导致最初形成的ζ-FeZn_（13）相层分解为液相和FeSi相，这可以基于Fe–Zn–Si三元体系的热力学计算来提出。

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