采用定向凝固连续铸造技术成功制备了纤维增强的自生复合 Cu- Cr合金电车线线坯 ,并对自生复合 Cu- Cr合金的定向凝固特性 ,包括组织形态、枝晶间距及纤维长度等 ,作了详细的研究。实验结果表明 :保持平面状或胞状的凝固界面有利于纤维状的自生复合组织的形成 ;当 GL=2 10℃ / cm,V=0 .6 mm/ min时 ,Cu- 0 .8% Cr合金凝固界面呈平面状 ;增加凝固速率 ,Cu- Cr合金的一次枝晶间距呈先增大后减小的规律 ,基体相的轴向长度则随着凝固速率的增大而增加 The wire rod blanks of fiber-reinforced autocomposite Cu-Cr alloy trolley wire were successfully prepared by directional solidification continuous casting technique. The directional solidification characteristics of self-forming Cu-Cr alloy, including the morphology, dendrite spacing and fiber length were also investigated Detailed research. The experimental results show that the solidified interface with planar or cellular shape is conducive to the formation of fibrous autogenous composite structure. When GL = 210 ℃ / cm and V = 0.6mm / min, the Cu-0.8% Cr alloy The solidification interface is planar. When the solidification rate increases, the primary dendritic spacing of Cu-Cr alloy first increases and then decreases. The axial length of the matrix phase increases with the solidification rate