The Effect of the Slippage Degree at Rolling with Slipping on the Wear Resistance of Contact Surfaces

Abstract

The regularities of the wear of the steel 1045 during cutting off the feed of a lubricant under the non-stationary friction conditions were established. The influence of the properties of the secondary structures, formed on the contact surfaces under conditions of rolling with a different degree of slippage, on the wear of advancing and lagging surfaces was determined. The influence of specific friction work, the degree of hardening -weakening of surface layers of metal and the intensity of saturation by active elements of near-surface layers of metal on the wear resistance of friction pairs is examined. The change is established in localization of the depth of spreading the stressed and deformed state of material of the contact surfaces with an increase in the slip rate from 0.315 m/s to 1.14 m/s at rolling with the slippage.

Influence Evaluation of the RVS Friction Geomodifier on Tribotechnical Parameters of the Contact in Non-Stationary Working Conditions

“…5). The determining effect of the micro-hardness of contact surfaces on their wear was as well established in the other works [20,21].…”

Temperature Resistance of the Boundary Lubrication Layers Under Rolling with Slippage Condition

“…To conduct running-in of the contact surfaces under non-stationary friction conditions ("start -stop" regime) in the automated tribotechnical complex whose basic characteristics are described in paper [17]; To create conditions of abundant lubricant feeding into the friction zone at the contact pressure by Hertz (100 -500 MPa) under conditions of rolling with a different degree of slippage (from 3 to 40%); To perform running-in of the friction pairs and to achieve subsequent operating time before the stabilization of the basic tribotechnical indicators of contact (thickness of lubricant film at rest, at start-up and in the period, which corresponds to the selected maximum rolling velocities of advancing and lagging surfaces; friction coefficient; specific friction work), which characterize the formation of a stable boundary layer by the components of the lubricant; To terminate feeding of lubricant into the friction zone, to remove the residues of lubricant from the contact surfaces with a rag; To register a change in the basic tribotechnical indicators of contact before the manifestation of the first signs of seizure of contact surfaces; To carry out an estimation of conditions for the occurrence of jamming by the critical temperature in the contact zone of the elements of tribological conjunction. We used rollers, made of steel 1045 (HRC 38, Ra 0.57 µm), as samples.…”