The microstructure of Cu-0.4Cr-0.2Zr-0.15Mg-0.02Ce alloy at as-cast

solid solution state and aging state was observed using optical microscope（OM）

scanning electronic microscope（SEM）and transmission electron microscope（TEM）.The precipitation phase of the alloy prepared was analyzed using energy dispersion spectrometer（EDS）.The results show that the microstructure of as-cast Cu-0.4 Cr-0.2Zr-0.15Mg-0.02Ce alloy exhibits typical dendrite structure

and the strip precipitated phase which is intermetallic compound contained Mg and Zr can be observed after solution treatment at 960℃ for 2h

and chromium-rich phase（Cr）and zirconium-rich phase（Cu4 Zr）can be generated after 60% cold-rolled deformation and aging at 480℃for 8h

meanwhile

Mg

Zr

Cr content in the strip intermetallic compound are increased obviously.The conductivity and hardness of the alloy with aging at 480℃ for different time such as 2、5、8、11、14、17hwere analyzed.The results show that the electric conductivity and hardness are increased quickly at first and then tended to stable state

finally decreased with increasing in the aging time.Conductivity and hardness reach the maximum values of 165and 46.98MS/ m

respectively

at 480℃×8hand at 480℃×11h

respectively.