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

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.