Contribution of burnishing to the microstructure and texture in surface layers of carbon steel

Ring samples of Ck45 steel have been subjected to burnishing with use of th ree variants; rolling ball, rolling mill and sliding ball. Texture and micr ostructure were examined on the surface and in the longitudinal cross-secti on of the samples cut out from the outer part of the samples after burnishi ng as well as after subsequent frictional wearing. The texture of the surfa ce layer was characterised by the main orientation {110} <112> for the roll ing ball, while for the rolling mill, except the {110} <112>, the {221} <11 4> + {112} <110> orientations were additionally stated. The surface texture of the sample deformed by sliding ball was described as the {221} <114> {001} <110>. All the samples hardened by burnishing were subjected to the s ubsequent wear at dry friction conditions and revealed the {221} <114> type of the texture, independently of the former state. Similarity between the shear texture of the bcc materials and the texture after burnishing was sta ted.