(东北大学 电磁材料过程研究教育部重点实验室，沈阳 110004)
摘 要: 采用扫描电镜和金相显微镜研究钢−铝轧制复合界面化合物的合金化抑制机理。结果表明：通过在铝中加入合金元素硅, 界面化合物的生成受到明显的抑制, 特别是当硅含量达到6.0%(质量分数)时, 抑制作用更强，即使在560 ℃加热时, 界面层的厚度也仅为2~3 μm, 且主要是Fe2Al5；由于Fe和Al扩散均匀，界面化合物在界面处呈等宽连续分布。通过热力学原理阐述界面化合物的生成规律。
关键字: 轧制复合; 界面化合物; 抑制作用; 生成规律
steel-aluminum rolling bonding composite board
（Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education,
Northeastern University, Shenyang 110004, China）
Abstract:Through scanning electron microscopy and metallograph microscopy, the restraining mechanism of steel aluminum rolling bonding interfacial high temperature compound building was investigated. The results show that, by adding alloying element Si to aluminium and nitrogen to steel, the interfacial compound building is obviously restrained. Besides, the more the Si element added is, the stronger the restraining effect is. When the mass fraction of Si is 6.0%, the restraining action is the stronger. Even when the heating temperature is 560 ℃, the thickness of the interfacial compound is 2−3 µm and mostly the portion is Fe2Al5. Because Fe and Al diffuse, the same width of continuous interfacial compound is built. In conclusion, Si evidently restrains the interfacial compound building. The interfacial compound of mechanism is clarified by thermodynamics theory building.
Key words: rolling bonding; interfacial compound; restrain; formation rule
