Еnergy-saving technologies of environmentally safe restoration and simultaneous strengthening of seating bearing for agricultural machines

Abstract

The paper presents the results of studies of various methods of restoring seats for rolling bearings (RB). The analysis made it possible to single out, as the most promising, the method of electrospark alloying (ESA) and deposition of metal-polymer materials (MPM) from all the considered methods. The combination of these technologies (ESA + application of MPM) made it possible to recommend for practical application a range of technological processes that allow using less energy-consuming and environmentally friendly technologies to restore RB seats.

In order to determine the most promising and environmentally friendly technology for restoring and strengthening the seating surfaces for the RB, comparative comparative tests were carried out on an SMTs-2 friction machine according to the disk-flat sample scheme, which served as a counterbody. A rectangular specimen made of VK8 hard alloy with a working surface roughness Ra = 1.6 μm was used as a counterbody.

As a result of studies of the wear resistance of coatings of samples made of steel 12Kh18N10T, it was found that the relative wear of uncoated specimens was 6.3; 4.7; 2.6 and 2.5 times higher than for specimens with coatings formed in the sequence: cementation by the ESA method (CEIL) → ESA Al → ESA T15K6 → MPM application; EILT15K6 → application of MMM reinforced with VK6 hard alloy; EILT15K6 → wire-reinforced MPM and EILT15K6 → MMM application.