(郑州大学 材料研究中心， 郑州 450002)
摘 要: 采用单辊旋铸快速凝固技术制备了Cu-0.6～5.0Cr(原子分数，%)合金条带，对铸态及时效处理后的合金性能(包括电特性和显微硬度)进行了研究。结果表明： 快凝铸态合金经过适当的时效处理后，可以在保持较高的电导率的前提下，显著提高其硬度。还在Matthiessen假设的基础上 对快凝工艺和时效工艺对合金的电特性的影响进行了分析和讨论，依据合金强化机理对合金硬度进行了分析。
关键字: 快速凝固； Cu-Cr合金； 高强； 高导
with high strength and high conductivity
（Research Center for Materials, Zhengzhou University,
Zhengzhou 450002, P.R.China）
Abstract:An investigation of properties including conductivity and microhardness was carried out for the as-cast and aged Cu-(0.6～5. 0)%Cr(in atom) alloys produced by single-roller melt-spinning method. The results show that the hardness of the rapidly solidified alloys is remarkably enhanced with only a small decrease of conductivity after proper aging treatment in comparison with the conventional solution treated and aged Cu-Cr alloys. The effects of rapid solidification process and subsequent aging on the electrical and mechanical properties were discussed on the basis of Matthiessen's hypothesis and the theories of precipitation and dispersion strengthening, respectively.
Key words: rapid solidification; Cu-Cr alloy; high strength; high conductivity
