Prediction of Cutting Parameters of HVOF-Sprayed Stellite 6

Valíček, Ján; Harničárová, Marta; Řehoř, Jan; Kušnerová, Milena; Drbúl, Mário; Šajgalík, Michal; Filipenský, Jan; Fulemová, Jaroslava; Vagaská, Alena

doi:10.3390/app10072524

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…It is well indicated here that the adhesive strength and thus the stiffness of the adhesive bond is given by the suitable roughness Ra , or Rz of the surface of the substrate after its machining, and thus a suitable ratio between the size of the structural grain D gr of the coating spraying material. A suitable Ra / D gr ratio [ 29 ] limits the porosity and any decrease related to homogeneity and stiffness of the transition, which fully corresponds to the original predicted theoretical consideration expressed by the Equation (33):

…”

Section: Resultsmentioning

confidence: 59%

“…Both Equations are derived by the authors of the article, they are experimentally and statistically verified and have been published for many years, e.g., [ 28 , 29 , 30 ], etc., or are also the content of patents [ 31 , 32 ]. They are very important in our application solutions because they simulate laboratory tensile and compressive tests for diagrams σ-ε , or σ- Δ h with relatively precise localization of the position and the value of the yield strength Re , and thus also the position of the neutral deformation plane h 0 and other stress-strain parameters of the materials.…”

Section: Methodsmentioning

confidence: 99%

“…The genesis of the research is based on previous publications on cobalt and nickel alloys (Stellite 1,2, Stellite 6 as the Co-Cr-W), which were finally machined by turning [ 28 , 29 , 30 ]. In this research, we dealt with the interaction of individual parameters.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and Mechanics of Thermal Spraying of Steel EN 10060 Substrate with NiCrBSi Alloy after Milling

et al. 2020

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The objective of this paper is to present a new way of identifying and predicting the relationship between thermodynamic and physical-mechanical parameters in the formation of a layer after spraying on a substrate with NiCrBSi alloy and its subsequent processing by milling. The milling of the spherical surface of the EN 10060 material after spraying was performed on the DMU 40 eVolinear linear milling centre. The experimental part of the article is focused on investigating the influence of cutting parameters when machining a selected combination of materials (substrate-coating: EN 10060 steel-NiCrBSi alloy). The experiment is based on the results of direct measurements of three basic cutting parameters, namely: cutting speed vc (m∙min−1), feed per tooth fz (mm), and the depth of cut ap (mm). The new distribution functions of selected cutting parameters were derived. The analytical results of the thermodynamic calculations performed on nickel-based alloy can be used for accurate predictions of the technological parameters of milling a spherical substrate made of EN 10060 steel after HVOF spraying, and also for both sample preparation and the subsequent production of high-quality coatings.

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…”

Section: Resultsmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

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Thermodynamics and Mechanics of Thermal Spraying of Steel EN 10060 Substrate with NiCrBSi Alloy after Milling

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“…Based on the relation (1), own measurement results, analyses and interpretations of obtained measurement results, a parameter characterizing tensile stress σ rz can be introduced, which can be expressed by the relation (19) after modifications [27,28].…”

Section: Tensile Stressmentioning

confidence: 99%

Milling of Complex Surfaces of EN 10060 Steel after HVOF Sprayed NiCrBSi Coatings

et al. 2020

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The high-velocity oxy-fuel spraying process was used to investigate and improve the surface properties of a workpiece. The research was focused on the spherical surface of a workpiece made of high-strength steel, a ball and socket assembly. After spraying with a nickel alloy, the surface was machined by milling. The coating was carried out as a process in which a very thin layer of coating of the required thickness and the required specific properties, i.e., high Vickers hardness, adhesion to the surface, wear resistance and other important characteristics, which must be respected in other machining methods, was applied to the already finished, heat-prepared metal substrate. This article deals with the milling of complex surfaces of steel substrate EN 10060 after spraying with NiCrBSi alloy. After spraying, a total of 15 milling experiments were performed in order to determine precisely the optimal cutting parameters of milling and surface adhesion, based on newly acquired prediction relations. The main presented results are new relations for the determination of optimal technological milling conditions based on the identification of adhesive sections using derived equations. The new relations were verified and also compared with the current literature in the field.

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“…Up to now, few reports are available on the precipitation of topological close-packed phases during high temperature oxidation process. In order to obtain a higher quality coated surface, many researchers have carried out related research, for example, Fernande-Abia proposed a mechanistic model for cutting forces in turning with nose radius tools [23][24][25][26]. In addition, generally MCrAlY coatings were widely deposited on superalloy by thermal spray technology including low-pressure plasma spraying, air plasma spraying and high velocity oxy/air fuel, physical vapor deposition and electron beam-physical vapor deposition, depending on the coating technical requirements.…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion Behaviour of NiCoCrAlY Coating and N5 Single Crystal Superalloy

et al. 2020

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This paper aims at investigating the microstructure and phases evolution of single crystal superalloy/high temperature protective coating during high temperature static oxidation, and exploring the influence of element interdiffusion behaviour on microstructure and phase evolution of the single crystal superalloy substrate. A NiCoCrAlY high-temperature protective coating was deposited on the Ni-based single-crystal superalloy by low-pressure plasma spraying technology. The coated samples were subjected to static oxidation for 200 h at a constant temperature of 1100 • C. Scanning electron microscope, energy dispersive spectrometer and X-ray diffraction were used to characterise the microstructure and phase after interdiffusion between the coating and the substrate at high temperature. The results showed that a dense thermally grown oxide layer was formed on the surface of the NiCoCrAlY coating after oxidation for over 100 h. The only interdiffusion zone was formed after oxidation for 50 h, while both interdiffusion zone and secondary reaction zone could be observed after oxidation for over 100 h. The thickness of interdiffusion zone and secondary reaction zone is increased with the extension of oxidation time, and the grain growth of topological close-packed phase in the secondary reaction zone is found. Al, Cr and Co in the coating diffuse from the coating to the substrate, while Ni and refractory materials like Ta, Mo, Re and W diffuse from the coating to the substrate. The interdiffusion of coating and substrate leads to the instability of γ/γ phase in the substrate, which finally results in the formation of W, Re and Cr-rich needle-like topological close-packed phase in the substrate.

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Prediction of Cutting Parameters of HVOF-Sprayed Stellite 6

Cited by 5 publications

References 23 publications

Thermodynamics and Mechanics of Thermal Spraying of Steel EN 10060 Substrate with NiCrBSi Alloy after Milling

Thermodynamics and Mechanics of Thermal Spraying of Steel EN 10060 Substrate with NiCrBSi Alloy after Milling

Milling of Complex Surfaces of EN 10060 Steel after HVOF Sprayed NiCrBSi Coatings

Interdiffusion Behaviour of NiCoCrAlY Coating and N5 Single Crystal Superalloy

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