【摘要】 制备了几种复合稀土银合金，实验研究了复合稀土银合金的组织与性能．提出复合稀土对银合金性能影响有互补性，复合稀土元素在铸态下偏聚且共生在枝晶边界上，形成AgrRE金属间化合物及氧化物，对银合金有显著的强化作用和细化晶粒作用，并提高了合金的再结晶温度，增强了合金的耐热性．这种合金经冷变形后退火，可以消除枝晶偏析，含稀土的第2相化合物呈团絮状分布在再结晶组织上，这有利于改善银合金的组织与性能．更多还原

【Abstract】 Several kinds of composite RE-Ag alloys have been made and the structure and property have been studied in the experiment.It is put forward that the effects of composite rare earth elements on the alloy’s property are Complementary.In casting condition,the composite rare earth elements segregate and grow together on the dendritic boundary.form intermetallics Agx RE and oxide,which strengthens the alloy remarkably and fines the grain,heighten its recrystallization temperature and improve its heat-resistance.Annealing after cold working can eliminate the dendritic segregation in the alloy.The second phase compoun d with rare earth is distributed over the recrystallized structure in the form of foccule which would be beneficial to the improvement of the alloy’s structure and property.更多还原