The Analysis of a Structural State of Surface Layer after Electroerosive Alloying. II. Features of Formation of Electroerosive Coatings on Special Steels and Alloys by Hard Wear-Resistant and Soft Antifriction Materials

Tarelnyk, Viacheslav; Гапонова, О. П.; Konoplyanchenko, Ye. V.; Yevtushenko, Nataliіa; GERASIMENKO, Vladislav

doi:10.15407/mfint.40.06.0795

Cited by 29 publications

(15 citation statements)

References 2 publications

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“…где Р -полное усилие обкатки, a и b -полуоси контура остаточной вмятины, приведенные в табл. 2 работы [2]. Из приведенных данных следует, что эффективность ППД, как метода снижения шероховатости поверхности, зависит от P ср и способа ЭЭЛ.…”

Section: результаты исследованийunclassified

“…Высокие результаты по микротвёрдости (14200 МПа) получены при электроэрозионном легировании (ЭЭЛ) стали 45 и Р6М5 композиционным электроэрозионным материалом 90%ВК6+10%1М. В части II [2] на основании анализа напряжённо-деформированного состояния поверхностных слоёв, подвергаемых ЭЭЛ с последующим поверхностным пластическим деформированием (ППД) алмазным выглаживанием (АВ) и обкаткой шариком (ОШ), и существующей методики определения геометрических и деформационных параметров очага деформации для однородных тел, разработана общая методика расчёта этих параметров для слоёв с любой структурой, возникающей в результате ЭЭЛ, позволяющая в широких пределах управлять качеством поверхностного слоя ответственных деталей.…”

Section: Introductionunclassified

“…The effect of RB specific force on microhardness of the layer (а) and the underlayer (б) of steel 45 samples with EEC from copper (1) and tin(2).…”

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confidence: 99%

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Improvement of Quality of the Surface Electroerosive Alloyed Layers by the Combined Coatings and the Surface Plastic Deformation. III. The Influence of the Main Technological Parameters on Microgeometry, Structure and Properties of Electrolytic Erosion Coatings

Гапонова¹,

Коноплянченко²,

Martsynkovskyy³

et al. 2019

Metallofiz. Noveishie Tekhnol.

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В работе обобщены результаты влияния поверхностной пластической деформации (ППД) эрозионных покрытий из твёрдых износостойких, мягких антифрикционных материалов и комбинированных эрозионных покрытий (КЭП) на показатели качества полученных слоёв. Показано, что применение КЭП, включающего формирование подслоя из меди для твёрдых износостойких покрытий, позволяет снизить величину растягивающих напряжений и повысить усталостную прочность. Проведение ППД приводит к созданию в поверхностном слое благоприятных напряжений сжатия. Найдены зависимости твёрдости поверхностных слоёв от удель

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Section: результаты исследованийunclassified

Section: Introductionunclassified

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Improvement of Quality of the Surface Electroerosive Alloyed Layers by the Combined Coatings and the Surface Plastic Deformation. III. The Influence of the Main Technological Parameters on Microgeometry, Structure and Properties of Electrolytic Erosion Coatings

Гапонова¹,

Коноплянченко²,

Martsynkovskyy³

et al. 2019

Metallofiz. Noveishie Tekhnol.

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“…The application of local surface treatment procedures based on the method of electrospark alloying (ESA) would make it possible to obtain the layers with the desired properties. The ESA method advantages are locality, low energy consumption, the absence of volumetric heating of the material, high adhesion of the coating with the base metal, the ease of automation of the process, environmental safety, and economy [ 22 , 23 ]. The ESA method allows for providing the implementation of the CTT processes such as carburising, aluminising, and chromising.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Technological Capabilities for Forming Al-C-B System Coatings on Steel Surfaces by Electrospark Alloying Method

et al. 2021

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In this paper, the possibility of applying the electrospark alloying (ESA) method to obtain boron-containing coatings characterised by increased hardness and wear resistance is considered. A new method for producing such coatings is proposed. The method consists in applying grease containing aluminium powder and amorphous boron to the surface to be treated and subsequently processing the obtained surface using the ESA method by a graphite electrode. The microstructural analysis of the Al-C-B coatings on steel C40 showed that the surface layer consists of several zones, the number and parameters of which are determined by the energy conditions of the ESA process. Durametric studies showed that with an increase in the discharge energy influence, the microhardness values of both the upper strengthened layer and the diffusion zone increased to Wp = 0.13 J, Hµ = 6487 MPa, and Wp = 4.9 J, Hµ = 12350 MPa, respectively. The results of X-ray diffraction analysis indicate that at the discharge energies of 0.13 and 0.55 J, the phase composition of the coating is represented by solid solutions of body-centred cubic lattice (BCC) and face-centred cubic lattice (FCC). The coatings obtained at Wp = 4.9 J were characterised by the presence of intermetallics Fe4Al13 and borocementite Fe3 (CB) in addition to the solid solutions. The X-ray spectral analysis of the obtained coatings indicated that during the electrospark alloying process, the surface layers were saturated with aluminium, boron, and carbon. With increasing discharge energy, the diffusion zone increases; during the ESA process with the use of the discharge energy of 0.13 J for steel C40, the diffusion zone is 10–15 μm. When replacing a substrate made of steel C40 with the same one material but of steel C22, an increase in the thickness of the surface layer accompanied by a slight decrease in microhardness is observed as a result of processing with the use of the ESA method. There were simulated phase portraits of the Al-C-B coatings. It is shown that near the stationary points in the phase portraits, one can see either a slowing down of the evolution or a spiral twisting of the diffusion-process particle.

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“…There is a method of electrospark alloying (ESA) that is becoming more widely used in industry to increase the wear resistance and hardness of the surfaces of machine component parts, including those operating in conditions of elevated temperatures and aggressive environments [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Quality of Sulfomolybdenum Coatings Obtained by Electrospark Alloying Methods

et al. 2021

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The authors of this paper have attempted to improve the quality of surface layers applied to steel elements of machine parts constituting friction couples. The main goal of the research was to investigate an electrospark alloying method process for obtaining abrasion-resistant tribological coatings containing molybdenum disulfide on a steel surface. A substance in the form of sulfur ointment with a sulfur content of 33.3% was applied on the surfaces of C22 and C40 steel specimens. In order to determine the influence of the energy parameters of ESA equipment on the quality parameters of coatings, the ESA process was carried out using a molybdenum electrode with discharge energies Wp = 0.13; Wp = 0.55; Wp = 3.4 J. The following tests were carried out on specimens with such coatings: metallographic analysis, microhardness tests, surface roughness, and local X-ray diffraction microanalysis. The experiments revealed that sulfomolybdenum coatings consist of four zones with different mechanical properties. Depending on the discharge energy and the substrate material, the hardness of these zones varies from approx. 1100 to over 10,000 MPa. Differences in the distribution of, among others, sulfur and molybdenum in the obtained coatings, as well as differences in the microstructure of the observed coatings, were observed.

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The Analysis of a Structural State of Surface Layer after Electroerosive Alloying. II. Features of Formation of Electroerosive Coatings on Special Steels and Alloys by Hard Wear-Resistant and Soft Antifriction Materials

Cited by 29 publications

References 2 publications

Improvement of Quality of the Surface Electroerosive Alloyed Layers by the Combined Coatings and the Surface Plastic Deformation. III. The Influence of the Main Technological Parameters on Microgeometry, Structure and Properties of Electrolytic Erosion Coatings

Improvement of Quality of the Surface Electroerosive Alloyed Layers by the Combined Coatings and the Surface Plastic Deformation. III. The Influence of the Main Technological Parameters on Microgeometry, Structure and Properties of Electrolytic Erosion Coatings

Assessment of Technological Capabilities for Forming Al-C-B System Coatings on Steel Surfaces by Electrospark Alloying Method

Analysis of the Quality of Sulfomolybdenum Coatings Obtained by Electrospark Alloying Methods

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