ABSTRACT The formation of bonding between Al and Fe after the initial compound casting and during a heat treatment regime is investigated. No significant bonding was observed between the two metals after the initial casting. This observation was attributed to the presence of oxide films on the liquid Al and solid Fe alloys. The heat treatment of the cast part at 973 K (700°C) for at least 15 min is shown to cause the two alloys to bond to each other seamlessly. The cracks that formed on the Al oxide layer (due to the pouring stresses or the remelting of the alloy) is suggested to provide the necessary paths for the contact between the Al melt and the trapped atmosphere between the Al and Fe alloys, and the contact between the Al melt and the Fe surface. A detailed mechanism for the bonding is presented in this paper.

中文翻译：

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复合铸件热处理过程中Fe/Al双金属的结合机理

摘要 研究了初始复合铸造后和热处理过程中 Al 和 Fe 之间结合的形成。在初始铸造后，两种金属之间没有观察到明显的结合。这一观察结果归因于液态铝和固态铁合金上存在氧化膜。铸件在 973 K (700°C) 下进行至少 15 分钟的热处理显示出使两种合金彼此无缝结合。建议在 Al 氧化物层上形成的裂纹（由于浇注应力或合金的重熔）为 Al 熔体与 Al 和 Fe 合金之间的夹带气氛之间的接触以及接触提供必要的路径。在铝熔体和铁表面之间。本文介绍了结合的详细机制。