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Vol 235
Pages:
70
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RUS ENG

STUDY OF BEARING UNITS WEAR RESISTANCE OF ENGINES CAREER DUMP TRUCKS, WORKING IN FRETTING CORROSION CONDITIONS

Authors:
Ju. Olt1
V. A. Krasnyy2
V. V. Maksarov3
About authors
Date submitted:
2018-08-30
Date accepted:
2018-10-26
Date published:
2019-02-25

Abstract

The occurrence of fretting corrosion on nominally fixed surfaces of high-loaded parts of mining machines and mechanisms is considered. Examples of wear and damage of critical parts, bearing assemblies of engines of dump trucks in fretting conditions are given. The mechanisms of fretting corrosion when using wear-resistant coatings are considered. It is noted that when choosing protective thin-layer coatings that provide an increase in the fretting-resistance of surfaces of tightly contacting parts, it is necessary to take into account both their wear resistance and the ability to resist shear. At the same time, the thickness of such coatings allows preserving, during operation, those provided during the assembly of the tension, without disturbing the maintainability of the nodes. The results of research of fretting wear of a number of coatings on a special installation are given. The mechanisms of wear of a number of thin-layer coatings based on friction-mechanical brazing, polymer fluorocarbon composition, solid lubricant coating using scanning electron microscopy were studied. Recommendations on the use of the studied thin-layer coatings for high-loaded parts of mining machines operating in fretting corrosion conditions have been developed. The aim of the work was to study the effect of a number of thin-layer coatings on the wear of highly loaded connections of the mechanisms of mining machines, in particular bearing assemblies of quarry dump trucks operating under fretting corrosion conditions.

10.31897/pmi.2019.1.70
Go to volume 235

References

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