采用双铜带压接法制备铜包钢线,研究了铜包钢线的退火热处理工艺,探讨了退火温度和时间对铜-钢复合界面扩散和结合强度的影响。结果表明,随着铜包钢线退火温度的升高和时间的延长,扩散层厚度增加,界面结合强度提高。与保温时间相比,退火温度对其影响较大。退火温度为750℃,保温2h后界面结合效果最佳,继续升高温度和延长时间,界面扩散层厚度和结合强度几乎不变。利用扩散方程计算Fe和Cu原子的扩散激活能和扩散常数,确定了扩散常数与退火温度的关系。综合考虑铜包钢线扩散层厚度与结合强度的关系及生产实际要求,得到铜包钢线的最佳退火工艺为750℃保温2h。
The method adopted to manufacture CCS wire in this study is pressing and cladding by two copper strips. The annealing treatment of CCS were studied, effects of annealing temperature and time of CCS on interface diffusion and bonding performance were discussed. The results show that the diffusion thickness and bonding strength are increased with the increase of annealing temperature and time. Compared with annealing time, annealing temperature has more effect on it. When the annealing temperature was 750~C, annealing time was 2h, the interface was effect. The interface diffusion layer thickness and bonding strength are invirable when continuing to increase the temperature and extend the time. Calculate the diffusion activation energy of Fe and Cu atoms and diffusion constant by diffusion equation, the relationship of diffusion constant and annealing temperature was conformed. According to the relation of diffusion layer thickness and bonding strength and the requirement of actual producing, the best annealing process was 750℃ for 2h.
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