Effect of shot peening on residual stress distribution and tribological behaviors of 17Cr2Ni2MoVNb steel

In this work, the shot peening (SP) treatment with different processing parameters was introduced to 17Cr2Ni2MoVNb steel. The finite element model (FEM) was performed in the same experimental conditions and the simulative results were compared with experimental results to study the residual stress distribution. In addition, the microhardness, surface morphology and tribological behaviors of SP treated samples were investigated and evaluated. Results showed that compressive residual stress was positively proportional to the SP velocity. During the tribological tests, the SP treated samples could obtain lower coefficient of friction (COF) and better wear resistance than the untreated samples. Moreover, the wear mechanisms of untreated and SP treated samples were ploughing and abrasive wear, respectively.