| 热浸铝镀层的微观结构及形成机理 |
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| 引用本文： | 夏原,姚枚.热浸铝镀层的微观结构及形成机理[J].中国有色金属学报,1997,7(4):154-158. |
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| 作者姓名： | 夏原 姚枚 |
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| 作者单位： | [1]中国科学院金属腐蚀与防护研究所腐蚀与防护国家重点实 [2]燕山大学材料系 |
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| 摘 要： | 在一定温度下，研究了Ｑ２３５钢在不同时间条件下热浸铝时镀层的微观结构变化及形成机理。结果表明，浸铝初期，在铝铁界面产生连续的ＦｅＡｌ３薄层；随时间延长，由于斜方晶格Ｆｅ２Ａｌ５相的快速生长，抑制了ＦｅＡｌ３相的进一步形成，使ＦｅＡｌ３相由初期的连续层向非连续相层转变，而Ｆｅ２Ａｌ５相呈不均匀齿状垂直于基体表面生长。通过ＳＥＭ及ＴＥＭ分析了镀层形成机理并提出了镀层的结构模型。
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| 关 键 词： | 热浸铝 FeAl_3相 Fe_2Al_5相 微观结构 |
COATING FORMATION PROCESS AND MICROSTRUCTURE DURING HOT DIP ALUMINIZING(HDA) ON STEEL |
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| Abstract: | The microstructure of aluminized coating and coating formation process of hot dip aluminizing (HDA) under definite temperature were investigated. It were shown, at the initial HDA stage, FeAl 3 phase formed continuously between interface of Al and Fe; however, the growth of FeAl 3 phase restrained by the faster growing rhombic Fe 2Al 5 phase with the time increasing, which causes FeAl 3 phase to turn from continuous to intermittence, Fe 2Al 5 phase grows vertical to surface unevenly and makes HDA coating be serrated morphology. Finally, microstructure model of HDA coating and coating formation process were put foreword firstly by TEM and SEM analysis. |
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| Keywords: | hot dip aluminizing(HDA) FeAl 3 phase Fe 2Al 5 phase microstructure |
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