Modernization of the Surface Layer Structure of Heavily Loaded Parts of Tillage Machines with Plasma Hardening

Kanaev, A. A.; Sarsembaeva, T. E.; Gulyarenko, A. A.

doi:10.3103/s0967091222030068

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…and external (friction coefficient, degree of slippage), presence or absence of lubrication, axle load, etc.) factors (Kanaev, 2020;Kanaev et al, 2023).…”

Section: Materials and Research Methodsmentioning

confidence: 99%

On the optimal ratio of the hardness of wheel and rail steel, ensuring minimal wear of the wheel-rail friction pair

Moldakhmetova,

Kanaev

2024

Materials of International Scientific-Practical Internet Conference “Challenges of Science”

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In this work, to identify the optimum between the hardness of the wheel and the rail, which ensures minimal wear, methods were used to determine wear by mass loss (volumetric wear) and by micrometric measurement of the size of the imprint (linear wear). It has been shown that the optimal range of wheel and rail hardness, determined by measuring (reducing) the size of the indentation, is in the range of 1.38-1.55. This interval practically confirms the wear identified by mass loss of 1.41-1.58. Based on these data, it is recommended to use the average value of the ratio between them, namely, 1.39-1.56 (HVк556-655, HVр400-420), which does not violate the objectivity and accuracy of measurements, both when determining volumetric and linear wear. It is noted that there is no magic relationship between the hardness of a wheel and a rail; there is only an optimal hardness for wheels and rails, determined by several internal (chemical composition, structure, properties, etc.) and external (friction coefficient, degree of slippage, presence or absence of lubrication, axle loads, etc.) factors.

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“…and external (friction coefficient, degree of slippage), presence or absence of lubrication, axle load, etc.) factors (Kanaev, 2020;Kanaev et al, 2023).…”

Section: Materials and Research Methodsmentioning

confidence: 99%

On the optimal ratio of the hardness of wheel and rail steel, ensuring minimal wear of the wheel-rail friction pair

Moldakhmetova,

Kanaev

2024

Materials of International Scientific-Practical Internet Conference “Challenges of Science”

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Microstructure and property evolution during tempering of a medium carbon bainitic steel

Mandal,

Ghosh,

Rajput

et al. 2024

Materials Science and Technology

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Tempering a medium carbon carbide-free bainite steel led to two distinct microstructures and properties below and above the bainitic start (Bs) temperature. Austenite decomposition during tempering, depended on carbon content, tempering temperatures and time, determining retained austenite (RA) stability. Up to 400 °C, most RA remained intact, but a significant reduction occurred above the Bs temperature. Film austenite primarily turned into carbides within the bainitic–ferrite matrix and form lines of carbide particles, while blocky austenite decomposed into troostite at 500 °C and sorbite at 600 °C. During tempering, on the other hand, bainitic ferrite lost tetragonality losing its carbon and resulting in the growth of bainitic–ferrite plates through grain boundary migration and misorientation annihilation. Above Bs, drastic microstructural changes caused significant alterations in tensile properties.

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Wear Resistance of Nickel Composite Coatings with Micron-Sized and Submicron-Sized Particles of SiC

Zhachkin,

Trifonov,

Sidorkin

et al. 2024

Engineering technologies and systems

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Introduction. Electrolytic deposition of nanoparticles is gaining interest with their increasing demand for restoring surface layers of machine parts and mechanisms. To create composite coatings with nanoparticles, it is necessary to solve two main tasks: to ensure a sufficient number of particles in the coating and to prevent their agglomeration in the coating solutions.These coatings with nanoparticles are wear-resistant and are used, for example, in automobile and tractor engines. In this study, there are considered the process of electrolytic production of composite coatings based on a nickel matrix with micron-sized and submicron-sized silicon carbide (SiC) particles from Watts nickel solutions and the resistance of nickel composite coatings to sliding wear.Aim of the Study. The study is aimed at considering detailed the effect of the size and number of particles in the coating solution on the number of codeposed particles. It is also necessary to study how the particle size affects the codeposition of micron-sized and submicron-sized particles of the non-Brownian type.Materials and Methods. A conventional nickel-plating electrolyte was used for nickel-based composite coatings with SiC. There was measured particle number density for each coating solution. It was assumed that the particles had the same size and shape of a sphere. The concentration of particles in the coating solutions ranged from 0.28 to 104 g/l. Electrodeposition was carried out on vertical electrodes, and the coating solution was stirred with a magnetic stirrer during electrodeposition. The Vickers microhardness with a load of 30 g was measured and wear tests were performed for unidirectional and bidirectional sliding.Results. The results of studying the wear resistance of nickel composite coatings during sliding have been obtained. The results of codeposition and a model based on the density of codeposed particles are presented. There has been made the conclusion about effect of codeposed particles on the wear resistance of Ni-SiC composite coatings.Discussion and Conclusion. It was determined that the best sliding resistance was obtained using Ni-SiC composite coatings containing 4–5 volume percentage of submicron-sized SiC particles. The study showed that the size and density of SiC particles in the coating solution are important for producing galvanically wear-resistant composite coatings, based on the relationship between the density of deposited particles and the density of particles in solutions.

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Modernization of the Surface Layer Structure of Heavily Loaded Parts of Tillage Machines with Plasma Hardening

Cited by 4 publications

References 3 publications

On the optimal ratio of the hardness of wheel and rail steel, ensuring minimal wear of the wheel-rail friction pair

On the optimal ratio of the hardness of wheel and rail steel, ensuring minimal wear of the wheel-rail friction pair

Microstructure and property evolution during tempering of a medium carbon bainitic steel

Wear Resistance of Nickel Composite Coatings with Micron-Sized and Submicron-Sized Particles of SiC

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