对拉制过程中铜丝断口运用扫描电镜和能谱进行了观察与分析。结果表明:在断口处存在微孔和夹杂物,其所在区域在铜线拉丝时会成为裂纹最先发展的区域,并导致铜丝断裂。因而提高铜棒原材料的冶金质量,完全消除熔炼制棒过程杂质的渗入是提高铜丝拉制质量和成品率的关键。 During the drawing process, the copper wire fracture was observed and analyzed by SEM and EDS. The results show that there are pores and inclusions in the fracture, and the area where the copper wire is drawn will be the first area where cracks develop when the copper wire is drawn, resulting in the fracture of the copper wire. Therefore, improving the metallurgical quality of copper rod raw materials and completely eliminating the infiltration of impurity during the process of smelting rod are the key points to improve the drawing quality and yield of copper wire.