微量铈和铬对Cu-0.1Ag合金接触线的性能影响

Effects of Adding Traces of Ce and Cr on Properties of Cu-0.1Ag Alloy for Contact Wires

采用显微硬度计、电子拉伸试验机、光学显微镜和TEM等,通过与Cu-0.1%Ag合金对比,分析了Cu-0.1%Ag-0.06%Ce合金和Cu-0.1%Ag-0.1%Cr合金的抗软化性能、合金元素的作用及组织形貌特征。结果表明:Cu-0.1%Ag合金中分别加入铬和稀土铈后,综合性能明显提高,软化温度分别提高了110和35℃,稀土化合物以小球状分布在晶体内,细化晶粒,提高硬度(强度)和抗软化性能。

Resistance to softening, the effects of alloy elements and microstructures of Cu-0.1% Ag-0.06% Ce and Cu-0.1% Ag-0. 1% Cr alloys were analyzed and compared with Cu-0.1% Ag ahoy, by using hardometer, electronic tensile testing machine, optical microscope and TEM, etc. The results indicate that the comprehensive properties of Cu-0.1% Ag alloy remarkably are improved after adding traces of Cr and rare earth Ce elements respectively. Softening temperatures rise by 110 and 35℃ respectively and the rare earth compounds of small ball shapes can refine grain sizes and improve strength or hardness and resistance to softening property.