退火对Cu-8wt%Fe原位形变复合材料组织及性能的影响

Effect of Annealing on Microstructure and Properties of Cu-8wt%Fe In-situ Composites

用原位变形法制备了Cu-8wt%Fe复合材料,并对其进行退火处理,获得了形变及退火对其组织、力学性能和导电性能的影响规律。Cu-8wt%Fe材料铸态下由等轴状的Cu相和树枝状分布其中的Fe相构成,经热挤压和冷拉拔后转变为纤维状。结果表明,通过退火可以提供相对拉拔态更加优越的强度和导电率匹配,在一定强度下,可提高导电率10%～20%。

The effects of deformation and heat treatment on the microstructure and properties of in-situ deformation processed Cu-8wt%Fe composite were investigated. The microstructure of the as-cast composite consists of equiaxed Cu phase and dendritic Fe phase which change into filaments after hot extruding and heavily cold drawing. The results show that, the optimized combination of strength and electrical conductivity can be obtained by annealing compared with as-drawn Cu-Fe in-situ composites and the electrical conductivity could be improved by 10%-20% at certain strength.