中文摘要：

采用冷拉拔结合中间热处理制备纤维复合Cu-12％Ag和Cu-12％Ag-0．3％RE合金，在不同温度对合金进行退火，分析合金中稀土化合物形态与结构，研究合金组织性能在退火过程中的变化规律及稀土元素的作用。结果表明：合金中初生富Cu枝晶及共晶体在拉拔过程中形成纤维复合组织，并在500℃退火演变为等轴晶粒；随退火温度升高，合金强度下降而其电导率升高；添加0．3％的稀土元素能够在Cu．12％Ag合金中形成（Cu，Ag）6（Ce，La）化合物粒子，并可提高300℃以下退火合金的抗软化能力，但使合金的电导率略为下降；（Cu，Ag）6（Ce，La）化合物粒子在拉拔过程中基本不变形，也不明显影响纤维组织退火时的再结晶行为。

英文摘要：

Cu-12%Ag and Cu-12%Ag-0.3%RE alloys were manufactured by cold drawing combined with intermediate heat treatments. The drawn alloys were annealed at different temperatures. The morphology and structure of the compound particles in Cu-12%Ag-0.3%RE were examined. The changes of the microstructure and properties with annealing temperature and the effect of rare earth additions were investigated. The results show that the primary Cu-rich dendrites and eutectic colonies in the alloys evolve into filamentary structure during the drawing deformation. The filamentary structure changes into recrystallization structure of equiaxed grains during annealing at 500℃. The strength of the alloy decreases whereas the conductivity increases with increasing annealing temperature. Adding 0.3% rare earth elements into Cu-12%Ag alloys （Cu, Ag）6（Ce, La） compound particles form and the softening resistance in annealing are increased at temperatures lower than 300 ℃, whereas the conductivity are slightly decreased. The compound particles are hardly deformed during the drawing process and hardly influence the recrystallizaion behavior of the filamentary structure during the annealing process.