THE EFFECT OF DIAMOND PRESSING AND ROLLER BURNISHING OF UNHEAT TREATED CARBON STEEL SURFACES

Abstract

Diamond pressing (DP) and roller burnishing (RB) processes are surface plastic deformation methods used to improve surface quality (microhardness and surface roughness). In the present work DP and RB tools with a special holder were used to study the effect of DP and RB on the surface texture of three different carbon steels (low, medium, and high) and to compare the both methods. The results show that the RB in the case of low carbon steel is better than the DP in terms of its effect on the microhardness and surface roughness, but in the case of the medium and high carbon steel the results depicts that the DP is better than RB in terms of its effect on the microhardness, but the RB is better than DP in terms of its effect on the surface roughness. As a result of this study it was found that DP and RB have a great effect on surface texture and RB was found to be better in surface roughness, but DP has better results in surface microhardness relative to ground surfaces. Also in this paper micrographs of the processed surfaces of low, medium and high carbon steel are given and it is shown that the depth of plastic deformed surfaces by diamond pressing was about (330, 345, 390) µm and by roller burnishing about (270, 245, 230) µm for the three steels, respectively.