通过对Bi白铜代替Pb白铜的连铸研究发现,采用传统方式连铸的无Pb易切削Bi白铜芯部晶粒粗大,沿传热方向呈放射状长大,塑性较差。而在水平连铸炉出口处加装了强制加热和冷却装置后,促进了晶粒沿轴向生长,同时细化了晶粒。退火后的Bi白铜切削测试结果表明,无Pb易切削Bi白铜完全可以替代Pb白铜。 The research on the continuous casting of Bi-Cu instead of Pb-Cu-Cu shows that the Pb-free and easily-cut Bi-Cu-Cu core which is obtained by continuous casting is coarse and grows radially along the heat transfer direction with poor ductility. The addition of forced heating and cooling devices at the exit of the horizontal continuous casting furnace promotes grain growth along the axis while refining the grains. After the annealing of the Bi-Cu cutting test results show that the Pb-free cutting Bi Bai Tong completely replace Pb-Cu-Cu.