Mechanism of bonding of Fe/Al bimetal during heat treatment of compound cast parts

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2020-11-01 DOI:10.1080/13640461.2020.1853392

H. Honarjoo, R. Raiszadeh

引用次数: 3

Abstract

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.

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复合铸件热处理过程中Fe/Al双金属结合机理

摘要:本文研究了Al和Fe在初始复合铸造后和热处理过程中形成的键合。初次铸造后，两种金属之间没有明显的结合。这一观察结果归因于液态铝和固态铁合金上存在氧化膜。在973 K(700°C)下对铸件进行至少15分钟的热处理可以使两种合金无缝地结合在一起。在Al氧化层上形成的裂纹(由于浇注应力或合金的重熔)为Al熔体与Al和Fe合金之间的俘获气氛以及Al熔体与Fe表面的接触提供了必要的途径。本文详细介绍了这种结合的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.