Analysis of impact-sliding wear property of 20CrNiMo steel

A four levels orthogonal table-L₁₆(4⁵) was adopted to design the experiments. Impact-sliding wear of 20CrNiMo steel were conducted using impact-sliding wear test rig which was developed independently. Experiment data were processed through multiple element linear regression and range analysis. Regression equation between average wear mass loss of 20CrNiMo steel and experimental factors, including impact frequency, impact load and sliding velocity, was obtained. Experimental factors affected average wear mass loss in a sequence of contribution as impact load, impact frequency and sliding velocity. Average wear mass loss increased as impact load and impact frequency increasing. Flaking took place at the wear trace and became severity with the impact load and impact frequency increasing. Plastic deformation of sample surface was developed under impact-sliding effect, and materials were extruded through edge of wear trace. The loss of materials was produced by the repetitive process. The wear mechanism of 20CrNiMo steel under impact-sliding condition was explained by delamination theory.