Research on Influence of Shot Blasting on Fretting Wear of Locking Surface of Steel Ring

Based on Archard wear mathematical model, a fretting wear model of the locking surface of the lock ring and the steel ring was established, and the change of the wear depth with the cycle times under the state of no shot blasting stress was analyzed.The initial shot blasting residual stress was applied by ABAQUS SIGINI subroutine to analyze the influence of different shot blasting stress on the contact pressure stress, slip amplitude, friction shear stress and other fretting parameters of the locking surface of the steel ring.The results show that when there is no shot blasting stress, the wear depth increases with the increase of the number of cycles, and the maximum wear depth appears at the contact edge of the locking surface of the steel ring.Under 150000 cycles of cycles, with the increase of shot blasting stress, the contact pressure stress, slip amplitude, friction shear stress and wear depth of the side contact edge of the steel ring locking surface gradually decrease, at the same time, the fretting parameters are transferred to the transition fillet.When the shot blasting stress is-100 MPa and -200 MPa, it can have a better anti-fretting effects on the locking surface of the steel ring.