中文摘要：

采用熔铸-中间热处理-形变工艺制备了Cu-14Fe及Cu-14Fe-0.06Ag原位复合材料,利用光学显微镜、扫描电镜、数字微欧计及液晶电子拉力试验机研究了微量Ag对Cu-14Fe合金微观组织、力学性能及导电性能的影响。结果表明,微量Ag的加入使Cu-14Fe合金枝晶组织更发达且枝晶臂直径更小,相同形变量下形成的纤维更加细小均匀,材料的强度显著提高,电导率也有所上升,伸长率略有提高,冷加工性能明显改善。

英文摘要：

Cu-14Fe and Cu-14Fe-0.06Ag in-situ composites were prepared by cast and thermo-mechanical treatment process.The effect of trace Ag addition on microstructure and mechanical and electrical properties of Cu-Fe in-situ composites were investigated by means of optical microscopy,scanning electronic microscopy（SEM）,tensile test and conductivity measurement using micro-ohmmeter.Experimental results indicate that the addition of trace Ag in Cu-Fe alloy can refine primary Fe dendrites and deforms finer Fe fiber,which leads to a significant increase in strength and slight improvement in conductivity.At the same time,the Cu-14Fe-0.06Ag in-situ composite shows much higher plasticity and better cold-working property.