Experimental study of GCr15 steel in ultrasonic rolling process

To improve the surface quality of GCr15 steel parts, research on GCr15 steel strengthening is of great significance. In the present study, the variation in the surface roughness and the surface residual stress was analysed following ultrasonic rolling of GCr15 steel. Specifically, the influence of the parameters of the ultrasonic rolling process on the surface roughness and surface residual stress was investigated. The surface roughness of the sample increased with increasing feed rate and rotation speed in the ultrasonic rolling process. With increasing static pressure and repeated rolling, the roughness of the sample first decreased and then increased. The residual compressive stress of the surface layer decreased with increasing feed rate and rotation speed and increased with increasing static pressure and repeated rolling. Additionally, as the static pressure was increased, the location of the peak residual compressive stress moved gradually from the sample surface to deeper within the layer.