不同制备工艺对连铸Cu-8wt%Ag合金力学性能及导电率的影响

Effects of Different Preparation Technologies on Me-chanical Property and Electrical Conductivity of Cu-8wt%Ag Alloy by Conti

摘要:

本文采用两种制备工艺，即连铸 冷拉丝加工工艺(CC CD)和连铸 等径角挤压 冷拉丝加工工艺(CC ECAP CD)制备Cu-8wt%Ag合金，随后进行时效处理。分别测试了不同应变量下Cu-8wt%Ag合金的力学性能和电学性能，探究了不同制备工艺下合金的显微组织、力学性能及电学性能的变化规律，分析了影响其性能变化的原因，并讨论了ECAP技术与传统冷加工技术相结合是否可以获得更好的综合性能。研究结果表明：采用CC ECAP CD制备的Cu-8wt%Ag合金的综合性能略高于CC CD制备的合金。这对解决Cu-Ag合金的高强度与高导电率之间此消彼长的问题具有一定的研究意义和应用价值。

Abstract:

In this paper, the Cu-8wt%Ag alloy was prepared by two kinds of preparation technologies, namely the continuous casting cold wire-drawing deformation preparation technology (CC CD) and the continuous casting equal channel angular pressing cold wire-drawing deformation preparation technology (CC ECAP CD), and subsequently was performed the aging treatment. This paper measured respectively the mechanical property and the electrical property of the Cu-8wt%Ag alloy with the different strain, explored the changing rules of the microstructure, the mechanical property and the electrical property by the different preparation technologies, analyzed the changing reasons of performance and discussed whether the better comprehensive performance was acquired by combining the ECAP with the traditional cold-processing. The results show that the comprehensive performance of the Cu-8wt%Ag alloy prepared by CC ECAP CD is a little better than that by CC CD. It is significant and valuable to solve the waxing and waning problem between the high strength and high conductivity of the Cu-Ag alloy.