Tribotechnical characteristics of cast iron with a steel coating in lubrication medium under unsteady modes

Mikosyanchik, O. A.; Мнацаканов, Рудольф Георгійович

doi:10.3103/s1068366617040109

Cited by 5 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

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

Section: The Micro-hardness Influence Of Contact Surfaces On Their Wear Resistance In Presence Of Repair Materials (Rvs) In Lubricantmentioning

confidence: 55%

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

Al-Quraan¹

2020

Tribol. Ind.

View full text Add to dashboard Cite

It has been found that empirical analysis provides a possibility to select the optimum concentration of the repair and restoring composition (RVS), addition of which to the transmission oil provides an increase in wear resistance of 42Cr4 steel under rolling and slip conditions. The structural adaptability of finely dispersed components of the friction geo-modifier RVS, boundary lubricating films and surface layers of metal under friction and under dynamic loading conditions contribute to reducing the wear of contact surfaces. It has been established that the addition of 1.5 % RVS to the lubricant provides a 17 % reduction in the wear of rolling friction pairs, provides hardening of the surface layers of the metal by 1.36 times, compared with the initial surface. The micro-hardness of the surface layers of the metal and its gradient depth distribution, the microgeometry of the surface layer formed during friction, and the formation of boundary lubricating layers on the friction-activated contact surfaces are key indicators that increase the wear resistance in friction pairs.

show abstract

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

Section: The Micro-hardness Influence Of Contact Surfaces On Their Wear Resistance In Presence Of Repair Materials (Rvs) In Lubricantmentioning

confidence: 55%

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

Al-Quraan¹

2020

Tribol. Ind.

View full text Add to dashboard Cite

show abstract

“…Friction and wear processes occupy a special place among the factors afecting the reliability of friction pairs. Te evaluation of these processes is complicated since the kinetics of their fow depend on the specifc pressure between the interacting surface layers, microstructural changes of the surface layer, and chemical reactions between the materials of the friction pairs [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Processes of Self-Organization in Nonstationary Conditions of Friction

Al-Quraan

Ilina

Kulyk

et al. 2023

Advances in Tribology

View full text Add to dashboard Cite

Self-organization mechanisms of metastable dissipative structures during friction depending on base and oil functional additives for hypoid gears are considered. Research was conducted on a software-hardware complex with simulation of gears’ operation in rolling with slipping conditions in start-stop mode. Indicators of formation of wear-resistant dissipative structures include the following: improvement of antifriction characteristics, lubricant boundary layers’ formation, contact surfaces’ strengthening, and formation of heterogeneous deformation microrelief with a fine-grained structure. The formation of chemically modified boundary layers on 90% of the contact area of tribo-coupling elements ensures an increase in the wear resistance of leading and lagging surfaces by 2 and 1.4 times, respectively. The sclerometry method was used to establish that the formation of dissipative structures when lubricating tribo-coupling elements with various transmission oils can reduce deformation processes in metal near-surface layers by 23%. Highly viscous flavored lubricant with distillate oil and additive composition ensures wear-resistant dissipative structures with active components, including oxygen, sulfur, and phosphorus.

show abstract

“…Furthermore, important consideration should be given to the choice of a hardening method, the use of which is conditioned by both economic and technological requirements. At this, preliminary assessment of the efficiency of the selected method should be made with taking into account the processes of structural adaptation of modified surfaces under friction [10,11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Continuity of Electric Spark Coatings on Wear Resistance of Aluminum Alloy

Al-Quraan¹,

Мнацаканов²,

Токарук³

et al. 2021

Tribol. Ind.

View full text Add to dashboard Cite

The replacement of ferrous metals with lighter non-ferrous ones, in particular with aluminum and its alloys, is of great importance for reducing the specific material consumption of products. Modification of aluminum alloy D16 with combined electro spark coating VK8 + Cu is considered. Based on the method of finite element analysis of the Nastran software complex, an optimal coating continuity was determined at the level of 55 -65%, which provides efficient workability of the coating via reducing the residual stresses in the base and tangent stresses in the plane of adhesive contact, optimization of the coating continuity, distribution of contact loads, and formation of optimal surface geometry. The results of modeling the stress-strain state of the coating-base at a coating continuity of 60% and a normal load of 600 N indicate a 30 MPa increase in equivalent stresses in a unit element of the coating and a decrease of this parameter by 100 MPa in the base as compared with an unmodified D16 surface, indicating the localization of normal stresses mainly in the combined coating. It was experimentally established that at a combined coating continuity of 60%, reduction of D16 wear by 2 times and decrease in the average power of acoustic emission by 1.33 times are provided, which testifies to the efficient structural adaptability of the coating-base under friction. The mechanisms of increasing the wear resistance of the VK8 + Cu coating according to the rheological-kinetic model, which reflects the correlation between processes of fracture and deformation under friction, are considered. It is determined that the high wear resistance of the combined coating is due to the combination of rheological properties of hard alloy VK8 with a fracture toughness of 13.2 MPa•m 1/2 and plastic copper material with a fracture toughness of 100 MPa•m 1/2 , which contributes to the efficient relaxation of stresses under friction.

show abstract

Tribotechnical characteristics of cast iron with a steel coating in lubrication medium under unsteady modes

Cited by 5 publications

References 1 publication

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

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

Dynamic Processes of Self-Organization in Nonstationary Conditions of Friction

Influence of Continuity of Electric Spark Coatings on Wear Resistance of Aluminum Alloy

Contact Info

Product

Resources

About