Anti-friction Products from Composite Materials Based on Lh15 Steel Powder

The work considers the possibility of manufacturing and using sintered composite products from a metal component in the form of alloy steel powder obtained from grinding waste of bearing production. The research was conducted at optimal pressing parameters of 400…800 MPa, sintering at 1200 ℃ for 2 h from the specified temperature. The results of the first systematic studies of the strength and tribotechnical properties of sintered materials based on LH15 steel powder obtained from grinding slurries with copper and graphite additives are presented. It was established that the tribotechnical characteristics of sintered products under medium loads mainly depend on the composition’s hardness. It has been experimentally verified that the high wear resistance and friction coefficient, which is on average 0.09, has a composition of 2% graphite and 4% copper at a sliding speed of 5 m/s and a pressure of 10 MPa. It has been experimentally confirmed that the increase in the linear dependence of stress on deformation, in particular when the strain is 8%, the stress is 1200…1400 MPa. This makes it possible to predict higher operational properties of products made from material of this composition. The resulting anti-friction products have a significantly lower cost and a higher material utilization ratio than traditional materials.