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研究了Yb、Er对8030导电合金力学性能、导电性能及高温蠕变性能的影响,并对不同性能的Fe、Cu、Yb和Er含量进行了优化。发现合金元素含量越高,合金室温力学性能越好,导电性能越差。但过高的Fe、Cu含量对高温抗蠕变能力不利,而Yb、Er添加能适当改善合金的高温抗蠕变能力。在热挤+热轧+冷轧后经180℃×1h时效处理,合金的抗拉强度(159~177 MPa)和20℃时的电导率(34.86~35.84 MS/m)均满足IEC62004标准要求,且Al-0.55Fe-0.15Cu-0.05Yb-0.10Er合金兼具最优的室温力学、高温抗蠕变和导电性能。
The effects of Yb and Er on the mechanical properties, electrical conductivity and high temperature creep properties of 8030 conductive alloy were studied. The contents of Fe, Cu, Yb and Er with different properties were optimized. It was found that the higher the content of alloying elements, the better the mechanical properties of the alloy at room temperature, the poorer the conductivity. However, too high contents of Fe and Cu are unfavorable to high temperature creep resistance, while addition of Yb and Er can improve the high temperature creep resistance of the alloy properly. The tensile strength (159 ~ 177 MPa) and conductivity at 20 ℃ (34.86 ~ 35.84 MS / m) all meet the requirements of IEC62004 after being hot-pressed, hot-rolled and cold-rolled and aged at 180 ℃ for 1h. And Al-0.55Fe-0.15Cu-0.05Yb-0.10Er alloy has the best room temperature mechanical, high temperature creep resistance and electrical conductivity.