Degree of Filling of the Roughness Profile of the Surface Obtained by Diamond Abrasive Treatment as a Factor Affecting Its Bearing Capacity

Abstract

It is known that the theory of contact interaction of rough surfaces is based on roughness parameters and, first of all, on the reference profile curve (on which this study is focused) and how it is related to other roughness parameters. It is shown that the greater index tp of the relative length of the reference profile, the greater the bearing capacity of such a surface. That is, the higher the reference curve rises, the greater the tp parameter. For example, at the level of 20 or 50% Rmax, the greater the degree of filling of the rough surface, the greater its bearing capacity. The surface area located below the reference curve characterizes the degree of filling of the rough surface with the finishing material. It is shown that the plasma effect of medium power generally has a positive effect on the treated surface when the surface has not yet melted, which leads to a certain degree of ordering and substantial improvement of the supporting surface. Plasma exposure with melting worsens both the microroughness height and the bearing capacity of the surface. It is proved that the simultaneous use of compacts and diamond grains in wheels allows one to achieve a decrease in the roughness of the treated surface and to obtain the specific microroughness profile, in which a surface with the increased degree of microprofile filling and the increased bearing capacity is obtained, when so-called “lubricant pockets” are formed.