Electrospark Deposition of Fenicrbsic–Meb2 Coatings on Steel

Umanskyi, Oleksandr; Стороженко, М. С.; Koval, O. Yu.; Gubin, Yu.V.; Tarelnyk, Viacheslav; Kurinna, T.V.

doi:10.1007/s11106-020-00138-5

Cited by 14 publications

(7 citation statements)

References 26 publications

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“…The effect of TiB2 and CrB2 additions to the commercial self-fluxing FeNiCrBSiC eutectic alloy on the structurization of electrospark coatings was examined in [7]. The mass transfer kinetics in the electrospark deposition of FTB20 (FeNiCrBSiC + 20% TiB2) and FCB20 (FeNiCrBSiC + 20% CrB2) composite materials and commercial self-fluxing FeNiCrBSiC alloy coatings onto steel 45 using an Alier-52 unit was studied.…”

Section: Analysis Of Research and Publicationsmentioning

confidence: 99%

“…Solutions of some acids can be used for this purpose. The first systematic study of the influence of the electrolyte on the possibility of realization of the anode-spark discharge on aluminum was carried out in [7], where the authors studied the properties of solutions of 33 different substances. The investigated electrolytes were divided into 6 groups.…”

Section: Selection Of Technological Modes Of Formation Of Anode-spark...mentioning

confidence: 99%

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Tribological properties of anode-spark coatings on aluminum alloys

Dykha

Babak

Makovkin

et al. 2022

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It is established that at present the technology of anode-spark coatings in general is well studied. However, the lack of recommendations for the choice of modes of technological processes and tribological characteristics in different operating conditions limit the widespread introduction of this technology. The task of this work was to analyze the processes of anode-spark coatings, improve technology and study the wear resistance of samples processed by this and traditional anode technology. The development of technology for the application of protective coatings on valve metals in the conditions of spark discharge included the choice of electrolyte and mode of operation of the bath: voltage, current density, hydrodynamic conditions and other parameters. Wear resistance tests were performed on a special installation. Structurally, the installation is made in two positions, which allows you to test two samples with different load conditions at a constant sliding speed. The design of the installation implements the friction scheme of the liner shaft. The study of anode-spark coatings in the mode of limiting lubrication was studied in the environment of industrial oil. The wear criterion was the weight wear of the samples according to the results of weight measurements before and after wear. It is established that prolonged electrolysis in the conditions of sparking leads to the formation of anode coatings that exceed in their properties the films obtained by non-sparking oxidation. Comparative studies of the wear resistance of anode-spark coatings and galvanic anode coatings under the same test conditions showed that the wear of anode-spark coatings is almost twice lower for the entire load range. The considered technology is recommended for increase of wear resistance of elements of devices from the aluminum alloys working in the conditions of corrosion and mechanical wear

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Section: Analysis Of Research and Publicationsmentioning

confidence: 99%

Section: Selection Of Technological Modes Of Formation Of Anode-spark...mentioning

confidence: 99%

Tribological properties of anode-spark coatings on aluminum alloys

Dykha

Babak

Makovkin

et al. 2022

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“…При прохождении электрического разряда между гранулой и подложкой происходит плавление металла и его полярный перенос на подложку [16]. Это сопровождается постепенным увеличением массы подложки с ростом времени обработки.…”

Section: результаты и обсуждениеunclassified

Electrospark deposition of tungsten carbide powder on titanium alloy Ti6Al4V

2021

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Titanium alloys are attracting the attention of researchers and engineers because of their unique combination of high specific strength, corrosion resistance and biocompatibility, but they are characterized by high wear. Therefore, the study of new methods for making protective coatings on titanium alloys is relevant. A mixture of titanium granules with tungsten carbide powder was used to prepare coatings on the titanium alloy Ti6Al4V by the method of electrospark granules deposition. Three mixtures of granules with a tungsten carbide content of 2.1, 4.1 and 6.0 vol.% were prepared. According to the data of X-ray analysis, it was found that the following phases were observed in the composition of the coatings: WC, W 2 C, W, αTi and β-(W, Ti)C 1−x . Carbides W 2 C, (W, Ti)C 1−x and metallic tungsten were formed as a result of the decarburization of WC upon its interaction with molten titanium under the conditions of an electric discharge. Large inclusions of tungsten carbide surrounded by a metallic Ti-W-C binder were observed in the microstructure of the coatings. According to the data of energy dispersive analysis, the concentrations of tungsten and carbon decreased when scanning from the surface layers of the coating to the substrate. The average values of the microhardness of the coatings increased from 7.9 to 9.2 GPa with an increase in the concentration of WC powder in the mixture of granules. The average values of the friction coefficients of the coatings were in the range of 0.33 -0.48, which is 35 ± 3 % lower than that of the Ti6Al4V alloy. Tests for wear in the dry friction mode at loads of 25 and 70 N showed that the wear rate of the coatings ranged from 0.38 ×10 −5 to 1.68 ×10 −5 mm 3 / Nm. The best wear resistance under both loads was demonstrated by the coatings deposited with the addition of 4.1 vol.% WC, which make it possible to increase the wear resistance of the Ti6Al4V alloy up to 18 times. Thus, the prospect of electrospark deposition of cermet coatings with enhanced mechanical properties on a titanium alloy using tungsten carbide powder mixed with titanium granules is shown.

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“…To increase the wear resistance and prevent cracking of the surfaces of brake pulleys, discs and drums made of steel and cast iron, which are operated under forced thermoforce regimes, various methods for strengthening surface treatment are used [54][55][56] and wear-resistant coatings are applied, in particular hard alloy, layered, or functionally graded coatings, etc. [57][58][59][60][61]. Plasma electrolytic oxidation is promising for the formation of composite oxide coatings on the working surfaces of brake discs made of aluminum and titanium alloys [62][63][64][65][66][67].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Degree of Degradation of Brake Pad Friction Surfaces Using Image Processing

Mandziy,

Ivasenko,

Berehulyak

et al. 2024

Lubricants

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The improvement of drilling rig systems to ensure a reduction in unproductive time spent on lowering and lifting operations for replacing drilling tools and restoring the performance of drilling equipment units is an important task. At the same time, considerable attention is paid to the reliable and efficient operation of the braking systems of drilling rig winches. In the process of operation, the polymer pads periodically come into contact with the outer cylindrical surface of the metal pulley during braking, work in extreme conditions and wear out intensively, so they need periodic replacement. Tests were carried out on a modernized stand and in industrial conditions for the brakes of drilling winches. A methodology for evaluating the degradation of the brake pad friction surface during its operation is proposed. The assessment of the degradation degree is carried out based on the image of the brake pad surface using image processing techniques. Geometric transformations of the input image were performed to avoid perspective distortions caused by the concave shape of the brake pads and the spatial angle at which the image is acquired to avoid glares. The crack detection step was implemented based on the scale-space theory, followed by contour detection and skeletonization. The ratios of the area and perimeter of segmented and skeletonized cracks to the total area were chosen as integral characteristics of the degradation degree. With the help of scanning electron microscopy, the character of the destruction of the friction surface and the degradation of the polymer material was investigated. Experimental studies were performed, and the application of the proposed method is illustrated.

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Electrospark Deposition of Fenicrbsic–Meb2 Coatings on Steel

Cited by 14 publications

References 26 publications

Tribological properties of anode-spark coatings on aluminum alloys

Tribological properties of anode-spark coatings on aluminum alloys

Electrospark deposition of tungsten carbide powder on titanium alloy Ti6Al4V

Evaluation of the Degree of Degradation of Brake Pad Friction Surfaces Using Image Processing

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