Studying the effect of the combined technology on durability of the shafttype parts
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 3, Issue 12
Abstract
<p>Restoration of shaft parts with extending their service life is an important reserve of development and growth of repair efficiency. Improvement of wear resistance and durability of parts of agricultural machinery is a priority trend in the present-day machine building. For this purpose, analysis was carried out and the process of electro-contact strengthening of sprayed wear resistant coatings on shaft parts was considered.</p><p>Experimental studies of physical and mechanical properties of wear resistant coatings obtained by the combined technology have been carried out. Dependence of the bond strength, porosity of the sprayed wear resistant coatings on current and pressure of the electro-contact strengthening process was established. With an increase in strengthening pressure up to 30‒40 MPa and current up to 14‒16 kA, there was an increase in the bond strength of the sprayed coating up to 180...220 MPa and a decrease in porosity to 2...5 %.</p><p>Wear resistance of the coatings obtained by the combined technology in the range of the studied loads and speeds was higher than that of the coatings obtained separately by classical technologies of flame and electric arc spraying. The highest wear resistance indicators were found in the coating of FMI-2 material applied by the combined technology.</p><p>Fatigue strength tests of the strengthened parts have shown that the coatings obtained by the combined technology increased the fatigue limit of the parts recovered by spraying by 20 %, and that of the parts without coatings by 50 %.</p><p>A comparative estimation of physical-mechanical and operational properties of the coatings obtained by electric arc and flame spraying and the combined technology was made. It was established that the use of electro-contact strengthening of the sprayed wear resistant coatings at a pressure of 20...40 MPa, current strength of 11...16 kA, duration of current pulses and pauses of 0.02...0.04 s significantly increased their physical and mechanical properties and performance.</p>
Authors and Affiliations
Natalia Miedviedieva, Miсhael Levitsky, Vladislav Sukhenko
Keywords
Related Articles
- EP ID EP528038
- DOI 10.15587/1729-4061.2018.132253
- Views 63
- Downloads 0
Modeling the parallelism of empirical models of optimal complexity using a Petri net
<p>Many physical processes and phenomena in view of their complexity cannot be described analytically. In these cases, empirical modeling is applied. In this research, the method based on the genetic approach is used to...
Classification rule hierarchical tuning with linguistic modification based on solving fuzzy relational equations
<p>The common problem with the hierarchical tuning methods is the lack of conditions for modification of the primary rules. The incremental approach accelerates the generation of candidate rules, but complicates the sele...
Geometrical synthesis of spatial six-link guiding mechanisms
<p><span lang="EN-GB">The study considers problems of geometric synthesis of spatial hinge-lever six-link mechanisms with linear displacement of the final link performing the guiding function. The variants of arranging t...
Development of a policomponent composition of smuz using biotechnological and mathematical modeling and determination of its food value
<p class="par-indent"><span lang="EN-US">We have determined parameters for an amino acid SCORE of the protein system, which consisted of solutions with different concentrations of collagen hydrolysate in whey (2 %, 4 % a...
Influence of the mean volumetric temperature of a thermoelement on reliability indicators and the dynamics of a cooler
<p>The paper deals with the influence of the mean volumetric temperature of a thermo-element branch on the basic parameters, reliability indicators and the dynamics of operation of thermo-electric cooler under different...