The effect of electromechanical treatment on structure and properties of plasma sprayed Fe-6W-5Mo-4Cr-2V-C coating

Ivannikov, A. Yu.; Калита, В. И.; Комлев, Д. И.; Radyuk, A. A.; Bagmutov, V. P.; Zakharov, I. N.; Parshev, S. N.

doi:10.1016/j.surfcoat.2017.12.051

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…В настоящее время для реализации прочностных возможностей современных стальных, титановых и других металлических сплавов и обеспечения необходимого комплекса эксплуатационных свойств ответственных элементов конструкций используются высокоэнергетические технологии упрочнения на основе лазерной [1][2][3][4][5][6][7], плазменной [8,9], электроискровой [10,11], ионной [12,13], электронно-лучевой [14][15][16], ультразвуковой [17], термопластической [18] обработок, а также интенсивные объемные и поверхностные пластические деформации [19][20][21][22][23].…”

Section: Introductionunclassified

Modeling of the coupled processes of residual stress formation in a metallic alloy taking into account structure transformation due to pulse thermo-force surface hardening

Bagmutov¹,

Denisevich²,

Zakharov³

et al. 2022

Comp. Contin. Mech.

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Section: Introductionunclassified

Modeling of the coupled processes of residual stress formation in a metallic alloy taking into account structure transformation due to pulse thermo-force surface hardening

Bagmutov¹,

Denisevich²,

Zakharov³

et al. 2022

Comp. Contin. Mech.

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“…Mo has excellent wettability with metal and carbide and usually acts as the matrix strengthening phase, which could obviously improve the strength of the composite. Meanwhile, Mo is a solid lubricant when it oxidizes into MoO 3 at high temperatures [17][18][19][20][21][22][23]. Zheng et al fabricated the TiC-Mo composite coating by vacuum plasma spraying and investigated its microstructure and tribological property.…”

Section: Introductionmentioning

confidence: 99%

“…Atmospheric plasma spraying is a commonly used method, which is used to fabricate the corrosion resistance and wear resistance of coatings [7,11]. Meanwhile, atmospheric plasma spraying is very easy to operate and does not change the mechanical properties of the matrix [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of a Ni-Based Composite Coating in Artificial Seawater

Liu

Gao

et al. 2019

Coatings

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NiCrAlY and NiCrAlY-Mo coatings were fabricated by atmospheric plasma spraying (APS). The corrosion-wear performance of the coatings was investigated in artificial seawater and the synergistic mechanism between wear and corrosion were evaluated in detail. Results showed that the diffraction peaks of Ni3Al shifted to the right and the microhardness of the coating was improved from 329.8 HV to 342.5 HV with adding the Mo element. Meanwhile, the NiCrAlY-Mo coating had a lower friction coefficient, with a wear rate of 0.26 and 3.69 × 10−6 mm3/Nm, compared to the NiCrAlY coating with a wear rate of 0.37 and 4.67 × 10−6 mm3/Nm. The NiCrAlY coating had severe corrosion and the corrosion mainly occurred in grain boundary. Adding the Mo element, the Mo element was distributed in the grain boundary and the coating had a lower corrosion rate and visibly slighter corrosion. The NiCrAlY-Mo coating had excellent corrosion-wear properties in artificial seawater.

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“…Основное внимание уделяли исследованиям структуры [15,17,19,25,26], глубины, твердости и других параметров упрочненного слоя [15 - 18, 21, 23 - 25], а также эксплуатационных характеристик (износостойкости [18,22], усталостной прочности [15,26]) упрочненных образцов.…”

Section: Introductionunclassified

Influence of structure and properties of surface layer on fatigue durability of hardened steels strengthened by combined electromechanical treatment

Bagmutov

Dudkina

Zakharov

et al. 2019

Izv. vysš. učebn. zaved., Čern. metall.

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Using the example of hardened carbon steels (steel 45, U8), the effect of combination of various surface hardening technologies is considered (using electromechanical processing, surface plastic deformation, non-abrasive ultrasonic finishing and their combination) on changes in structural state and surface microhardness, cyclic durability of hardened specimens and fatigue failure mechanisms. The studies were carried out by the methods of optical and scanning electron microscopy and by microhardness and fatigue tests. It is shown that for the investigated steels in quenched state, a high-speed pulsed thermo-deformation effect during electromechanical processing is accompanied by an increase in the surface microhardness (by more than 50 %) and decrease in the fatigue limit (by 20 – 30 %). Such a change in properties is associated with formation in the surface layer of substantially non-equilibrium, inhomogeneous in chemical composition, ultradispersed phases with increased hardness. At the same time, in the near-surface metal volumes tempering processes of the hardened structure proceed with the formation of softening zones and tensile residual stresses, accompanied by a decrease in the microhardness in these zones and the fatigue limit of the specimens. Such effects reduce some of the materials performance characteristics during surface hardening. The ways to improve the properties of such products due to additional technological operations require further studies. Combined surface hardening (based on electromechanical processing, surface plastic deformation and non-abrasive ultrasonic finishing) of carbon steels allows, due to variations in the intensity of temperature and deformation effects, to purposefully change the structural-phase composition and stress-strain state of the surface and near-surface metal layers. As a result, it becomes possible to form a balanced complex of strength and fatigue characteristics of the samples, depending on the preliminary heat treatment of steel. The operations of surface plastic deformation and non-abrasive ultrasonic finishing after electromechanical hardening, due to intensive plastic deformation provide smoothing of the surface and healing of near-surface defects and allow correction of stress-strain state of the processed metal. It provides an increase in microhardness in the tempering zone by 20 – 25 % and the fatigue limit of the samples by 25 – 30 %.

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The effect of electromechanical treatment on structure and properties of plasma sprayed Fe-6W-5Mo-4Cr-2V-C coating

Cited by 12 publications

References 19 publications

Modeling of the coupled processes of residual stress formation in a metallic alloy taking into account structure transformation due to pulse thermo-force surface hardening

Modeling of the coupled processes of residual stress formation in a metallic alloy taking into account structure transformation due to pulse thermo-force surface hardening

Tribological Performance of a Ni-Based Composite Coating in Artificial Seawater

Influence of structure and properties of surface layer on fatigue durability of hardened steels strengthened by combined electromechanical treatment

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