Radionenko A. Mechanism of Boundary Lubrication of the Friction Surfaces with Partly Regular Microrelief and Their Technological providing

The dissertation is devoted to establish objective lows of boundary lubrication mechanism on the friction surfaces with partly regular microrelief (PRMR according to ГОСТ 24773-81) with the purpose of improvement antifriction descriptions of these sur-faces. A design of a tribometer with the friction model "crankshaft - steel belt" has been worked out. An improved bridge-type design was applied, the latter enabling to con-trol the lubrication procedure as well. Experimental research of an adhesion constituent of the friction coefficient was performed with the exception of a deformation constituent. The influence o PRMR pa-rameters of the coefficient of friction on the adhesion constituent was studied. It was found that when the PRMR surfaces are under friction the microprojections of the rough surfaces are in mesh with the microgrooves of the adjacent surface. Transient conditions for PRMR surfaces from boundary lubrication to semi-liquid and liquid were determined. It was revealed that in boundary friction there is no optimum for the relative area of microgrooves. Shown that wettability plays a noticable part in friction for netra-smooth PRMR surfaces and that microchannels enable the liquid lubricating material to flow over owing to the forces of surface tension. A model of fric-tion for PRMR surfaces has been worked out. New friction surfaces and combined methods of their formation were obtained. One of such methods was tested on the friction surface of industrial test samples. Key words: mechanism of lubrication, boundary lubrication, PRMR surface, adhesion constituent, deformation constituent, wettability, friction conditions, friction model, combined processing.