Effect of surface nanosizing on the wear and corrosion resistance of β-type titanium alloy TB11

In response to the problem that the service life of titanium alloy TB11 decreases mainly due to wear and corrosion occurring on the surface when it is in human service, surface nanocrystallization is proposed to enhance the wear and corrosion resistance of TB11. Firstly, the surface layer of TB11 was nanocrystallized by repeated mechanical hammering, and the microstructure, hardness, wear and corrosion results of the samples with different hammering times were compared. It was found that after hammering 30 min, the grain size of TB11 surface layer reached 32.21 nm and stabilized. On the basis of this, the samples hammered for 30 min were annealed at different temperatures, and the wear and corrosion of the samples with different treatments were analyzed. The results showed that the refinement of surface grain size and the formation of uniform and dense passivation layer after hammering 30 min + annealing 650 °C treatment had the best effect on the improvement of TB11 wear resistance and corrosion resistance. Therefore, hammering 30 min + annealing 650 °C annealing treatment can strengthen the surface layer of TB11 and make it have stronger wear resistance and corrosion resistance.