Abstract:Cu-Cr-Zr-Nb alloy was designed by considering the role of Nb element in Cu-Cr-Zr alloy. The alloy samples were prepared by vacuum induction melting and a two-step rolling-aging process，and their microstructure and wear resistance were studied. The results showed that a large number of dislocations，nano-precipitates，and deformation twins existed in the samples after the two-step rolling-aging process，which improved the strength of the alloy. By alloying Nb element，uniformly distributed Cr2Nb particles were introduced into the alloy， and micro- and nano-sized Cr particles were observed in the alloy. The properties of the alloy were effectively enhanced by the synergistic effect of micro- and nano-sized particles. The friction coefficient of the as-cast samples was generally above 0.6，and the volume wear increased with the increase of the experimental load. After the rolling-aging process，the friction coefficient of the aging samples decreased to less than 0.6 due to the increase in strength and hardness，and the volume wear was below 0.2 mm3 steadily. The adhesive wear and fatigue wear were the main wear mechanism.