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通过铝层Si合金化手段,制备了Cu/Al-Si合金冷轧复合带。利用金相显微镜、扫描电镜、万能材料试验机等仪器,研究了不同Si含量对Cu/Al-Si合金冷轧复合带界面扩散层厚度、界面结合强度、界面和基体处的显微硬度以及再结晶组织等的影响规律。结果表明,铝层中一定量的硅合金化可以起到阻碍铜铝原子互扩散、抑制铜铝金属间化合物的生长、提高铝侧基体显微硬度以及细化晶粒等作用,但是在高温、长时间热处理条件下,硅会降低界面的结合强度。
The cold-rolled Cu / Al-Si alloy composite strip was prepared by Si alloying. The effects of different Si contents on the interfacial diffusion layer thickness, interfacial bonding strength, microhardness at the interface and matrix of Cu / Al-Si alloy cold-rolled composite strip were studied by means of metallographic microscope, scanning electron microscope and universal material testing machine. The impact of crystal structure and other laws. The results show that a certain amount of silicon alloying in the aluminum layer can prevent the mutual diffusion of copper and aluminum atoms, inhibit the growth of copper-aluminum intermetallic compounds, increase the microhardness of aluminum side matrix and refine the grain. However, at high temperature, Long time heat treatment conditions, silicon will reduce the bonding strength of the interface.