Abstract
A plasma sprayed Cu11.85Al3.2Mn0.1Ti coating on Ti6Al4V alloy was processed with in–situ laser remelting to improve its tribological performance. The effects of laser remelting on the structural evolution and high–temperature tribological properties of plasma sprayed coating were investigated using a wear tester, and the wear mechanism was also discussed in detail. The results show that the pores, layered structures and un–melted particles of plasma sprayed coating are eliminated by laser remelting, and its microstructure and hardness are further improved by in–situ laser remelting. The coefficient of friction of laser remelted coating is reduced by 26% compared with the plasma sprayed coating, and the corresponding wear rate is also decreased by 70%, showing that the superior friction reduction and wear resistance.
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