Study of the effect of ion nitriding regimes on the structure and hardness of steel

Sоbоl, O. V.; Андреев, А. А.; Stolbovoy, V. А.; Knyazev, S. A.; Barmin, A. E.; Кривобок, Н А

doi:10.15587/1729-4061.2016.63659

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…As is known, one of the critical parameters that determine the physical and mechanical properties of coatings and their further performance is macrostrain [6]. In the coatings obtained at p N = 6.7•10 -1 Pa, the amount of macrodeformations was about -0.1% for the "floating" potential and -1.95% for U p = -200 V. The hardness of these coatings was almost the same and reached the value of 26-28 GPa.…”

Section: Vacuum Arc Coatings Tinmentioning

confidence: 99%

Comparative Analysis of Structure Formation and Properties of PVD Coatings Tin, Ti/Tin and Tin-Mon

Pinchuk¹

2023

The Scientific Paradigm in the Context of Technological Development and Social Change

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Nanocomposite coatings represent a new generation of mate-rials and they consist of at least two phases with a nanocrystalline and/or amorphous structure. They have a lot of unique properties, the appear-ance of which is associated with a high volume fraction of phase boundar-ies, with the strength of these boundaries, with the absence of dislocations inside crystals. The purpose of the paper analysis of the reasons for the observed changes, based on the mechanism of formation of surface lay-ers of vacuum-arc coatings under the condition of implantation processes stimulated by applying a negative potential to the substrate. Methodology. All samples were obtained using modern coating methods on a modernized "Bulat-6" installation. Cross section imagines were carried out by meth-ods of optical, electron microscopy. Structure of the samples was studied using a "DRON-3M" instrument in Cu-Kα radiation. Separation of diffrac-tion profiles was carried out using the "New profile". Mechanical tests of materials were performed in the mode of microindentation. Results. At all schemes of deposition of TiN coatings, a single-phase state with an fcc lattice is formed. As the displacement potential increases, a transition from [100] to [111] texture is observed. In multilayer nanostructured TiN/Ti coat-ings, a texture develops in titanium nitride layers with a thickness of 300 nm or more when a displacement potential is applied [111]. The thickness of the Ti layers of more than 30 nm is sufficient for the development of the stress-strain state in the TiN layers without their significant relaxation. When the displacement potential increases, the macrostress of the compression in the titanium nitride layers of TiN increases. It was established that epitaxial growth of isostructural cubic modifications of titanium nitride and molybdenum nitride without the formation of a two-phase state is possible with a small thickness of layers in the TiN-Mo2N multilayer system (≈2 nm). At a greater thickness, a two-phase material is formed, where the second phase is high-temperature molybdenum nitride γ-Mo2N with a cubic lattice, which is isostructural to titanium nitride. Practical implications. The final properties of nanocrystalline coatings such as the size and orientation of the grains, the structure strongly depend on the technological parameters of deposition – ion bombardment, shear potential, temperature of the sub-strate, flow density and energy of the precipitating ions, therefore, in order to achieve the desired results in each specific case, it is necessary to strive for optimization of the process deposition of coatings. Value/originality. A possible mechanism for the formation of micro- and nanostructured lay-ered condensates under conditions of continuous influence of condensation of accelerated particles of the deposited flow is proposed. At the same time, the surface is subject to bombardment, which is based on radiation-stim-ulated processes of redistribution of elements of the deposited flow and structural defects of the coating material that is formed.

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Section: Vacuum Arc Coatings Tinmentioning

confidence: 99%

Comparative Analysis of Structure Formation and Properties of PVD Coatings Tin, Ti/Tin and Tin-Mon

Pinchuk¹

2023

The Scientific Paradigm in the Context of Technological Development and Social Change

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“…Йонне азотування має істотні переваги порівняно зі стандартними процесами пічного насичення з газової фази, а саме: велику швидкість перебігу процесу (у 1,5-2 рази швидше); можливість проводити реґульовані процеси азотування з оптимізацією дифузійних шарів за фазовим складом і будовою з урахуванням умов експлуатації деталів; мінімальні деформації виробів у процесі ХТО та збереження вихідного класу чистоти поверхні; велику економічність та екологічність процесу, високий коефіцієнт використання електроенергії, скорочення витрат насичувальних газів [4]. Переваги йонного азотування в плазмі жеврійного розряду порівняно з традиційними процесами азотування, їх сутність і галузі застосування висвітлено в багатьох роботах [5][6][7][8][9][10][11]. На сьогоднішній день, проте, бракує досліджень процесу азотування в плазмі геліконного розряду, застосування якого є вельми перспективним через високу густину плазми, широкі можливості реґулювання енергії, складу йонного потоку, енергоощадність, сталість функціонування в широкому діяпазоні тисків газу та напруги, можливість спрямовувати потік йонів під різними кутами до азотованої поверхні.…”

Section: аналіз попередніх досліджень та мета даногоunclassified

Hardening of a Surface of Steel 45 by the Ion Nitridation in a Helicon Discharge

Rudenko¹,

Panarin²,

Kyrychok³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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“…According to the condition of filler material deposition, the three most popular surfacing techniques utilized today are as follows: solution state (sole gel, electrochemical deposition [ 19 , 20 ], chemical solution deposition), gaseous state (ion beam-assisted deposition (IBAD), chemical vapour deposition (CVD)), physical vapour deposition (PVD) [ 21 , 22 ] and molten or semi-molten state (arc welding, plasma technology [ 23 , 24 ], spraying [ [25] , [26] , [27] , [28] ] and laser/electron beam [ 29 , 30 ]. Another issue is the shaping properties of surface layers to improve the tribological characteristic and wear resistance by various surface engineering methods including heat treatment [ 31 , 32 ] and thermochemical treatment (oxidation [ 33 , 34 ], carburizing, boriding, nitriding [ 35 ]) etc. Among the variety of methods used for hardening coating applications, the simplest and most efficient are the arc welding techniques [ 2 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Prediction of phase composition and mechanical properties Fe–Cr–C–B–Ti–Cu hardfacing alloys: Modeling and experimental Validations

Lozynskyi,

Trembach,

Hossain

et al. 2024

Heliyon

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Study of the effect of ion nitriding regimes on the structure and hardness of steel

Cited by 4 publications

References 16 publications

Comparative Analysis of Structure Formation and Properties of PVD Coatings Tin, Ti/Tin and Tin-Mon

Comparative Analysis of Structure Formation and Properties of PVD Coatings Tin, Ti/Tin and Tin-Mon

Hardening of a Surface of Steel 45 by the Ion Nitridation in a Helicon Discharge

Prediction of phase composition and mechanical properties Fe–Cr–C–B–Ti–Cu hardfacing alloys: Modeling and experimental Validations

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