形变Cu-13.2vol.%Fe原位复合材料导线研究  

Study of A Deformation Processed Cu-13.2 vol.% Fe in Situ Composites

作　　者：葛继平[1] 

机构地区：[1]大连铁道学院材料科学与工程系,116028

出　　处：《大连铁道学院学报》2003年第3期71-76,共6页Journal of Dalian Railway Institute

基　　金：大连市科技计划资助项目(2002A1GX024)

摘　　要：研究了采用感应加热熔炼和室温变形制备CU-13.2vol.％Fe原位复合材料导线的工艺过程,并探讨了降低电阻率的中间热处理作用,用光学显微镜、SEM和TEM观察分析了变形过程中组织结构的变化,结果指出,Fe树枝晶的变形是不均匀的,中间热处理有利于均匀变形,在较大变形量下,Fe树枝晶形成纤维,空间形态为薄片状,相结构为α-Fe,测定了力学性能和电阻率,结果是变形量越大,强度越高,电阻率越大,经中间热处理,可在不降低强度的同时,大大降低电阻率,几个较好的电导率/极限拉伸强度组合为:70.6％LACS/659MPa、64.6％/752 MPa和51.9％IACS/880MPa。Cu-13.2vol. % Fe in situ composites are prepared from as-cast alloys. The alloys are subsequently room-temperature drawn to various strains when Fe dendrites are drawn into fine ribbons. The Fe ribbon is curl and fold in cross-section. The tensile strength and electrical resistivity increase with the increase in wiredrawn content. A series of heat treatments arelondacted at various stages of wire-drawn to promote precipitation of iron from copper, and the good combination of tensile strength and electrical conductivity are achieved.

关 键 词：形变 导电材料 电气化铁路 Cu-13.2vol.%Fe原位复合材料 导线 电阻率 力学性能 接触线 接触网 

分 类 号：TB331[一般工业技术—材料科学与工程]