THERMAL PHYSICS OF A DIAMOND BURNISHING PROCESS
The study shows the analytical solution of the problem of the heating of two hard inert materials by a friction force. The solution takes into account dependency of the friction force by temperature. It is adapted to investigate the maximum temperature, when diamond burnishing operation, by force of addition to calculated dependency by formula, which makes it possible to evaluate the nominal area of contact between diamond indenter and workpiece. The formula includes both the contact area, conditioned by workpiece elastic and plastic deformations, and additional contact area, formed as a result of the metal plastic flow wave, appeared in front of indenter. The study gives experimental dependencies of the burnishing force influence on the depth of indentation into the workpiece of heat-resistant steel 15H12N2MVFAB-S, when deformation of its surface layer, and influence on the height of the metal plastic flow wave in front of indenter. Calculated dependencies show how the force and burnishing rate influence on the maximum temperature in and around contact of the indenter with workpiece. It is established, that significant influence on maximum temperature in and around contact exerts the burnishing rate, when temperature increases with burnishing rate rising, but the burnishing force increase influences on rising of temperature in a lesser degree.