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考虑到铜铝复合板在长期工况下可以正常使用的稳定性,通过实验对铜铝复合板的导电率、通电的温升情况以及剥离强度和界面组织做了相关的研究工作。通过实验得出铜铝复合板退火热处理温度、时间与复合板导电率的关系,发现铜铝复合板热处理温度为300℃、热处理时间为6 h,其导电率达到最高值。同时,通过对不同母线排进行通电后温升测试发现,经热处理后的铜铝复合板具有优良的温升性能,该性能接近于纯铜并优于纯铝。在经过大电流480A通电时,最高温度可达74.5℃。将铜铝母线排的使用工况设定为80℃,将铜铝复合板进行80℃、1000 h的服役条件测试后,铜铝复合板的综合性能没有发生变化。在实际工况下长期使用具有稳定的性能。
Taking into account the stability of the copper-aluminum composite panel in normal use under long-term operating conditions, the related research work on the conductivity, the temperature rise of the power supply, the peel strength and the interfacial microstructure has been done through experiments. The relationship between the annealing temperature and time of the composite sheet and the thermal conductivity of the composite sheet is obtained through experiments. The results show that the thermal conductivity of the composite sheet is 300 ℃ and the heat treatment time is 6 h, and the conductivity reaches the maximum value. In the meantime, through the temperature rise tests on different busbar rows, it is found that the heat-treated copper-aluminum composite board has excellent temperature rising performance, which is close to pure copper and superior to pure aluminum. After a large current 480A energized, the maximum temperature up to 74.5 ℃. The use of copper and aluminum busbar operating conditions set to 80 ℃, the copper and aluminum composite panels at 80 ℃, 1000h service conditions tested, the overall performance of copper-aluminum composite panels did not change. In the actual conditions of long-term use has a stable performance.