The Cu-1.0Cr alloy was hot forged

solid solution-treated and cold rolled as well as subjected to aging treatment at different temperature for different time.Hardness and electrical conductivity of the alloy at different states were measured and microstructure was observed.The results reveal that at 380℃

hardness and electrical conductivity are increased with extending in aging time

while at 450℃

with extending in aging time

hardness is obviously decreased

however

electrical conductivity keeps stable.At given experimental conditions

hardness and electrical conductivity of the alloy with aging at 450℃ for 6hours reach up to 127HB and 40.08MS/m.Secondary disperoid in the Cu matrix can be observed in the alloy after thermo-mechanical treatment

which is responsible for the raise of hardness and electrical conductivity.Recrystallization appears in the alloy with increasing in aging temperature and aging time

which results in the great decrease of hardness at 450℃.