Oxidation during electric arc spray forming of steel

Newbery, A.P.; Grant, Patrick S.

doi:10.1016/j.jmatprotec.2006.03.176

Cited by 60 publications

(34 citation statements)

References 10 publications

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“…Deposits are mainly composed of a heterogeneous microstructure. Phase transformation processes, due to the inherent process characteristics [43,44], among others, provoke the formation of brittle phases, which in turn lead to a degradation of the mechanical properties [45].…”

Section: Introductionmentioning

confidence: 99%

Process Parameter Settings and Their Effect on Residual Stresses in WC/W2C Reinforced Iron-Based Arc Sprayed Coatings

2017

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Abstract:Residual stresses have been a major source of concern, as they are an inevitable consequence of manufacturing and fabrication processes. The magnitude of these stresses is often as high as, or at least, comparable to the yield strength of the material. In terms of arc sprayed coatings, the utilization of bore hole drilling methods presents some practical disadvantages as mechanical parameters (Poisson's ratio, Young's modulus) need to be identified in order to determine the residual stress distribution. Curvature techniques using Almen strips are cost-and time-effective methods that can be used for analytical quality assurance. Within the scope of this work, a quantitative study of the amount of residual stresses induced in a twin wire arc spraying (TWAS) process for a given combination of process parameters was conducted using the incremental bore hole drilling method, as well as the curvature method including Almen strips. Therefore, the effect of the primary gas pressure, substrate preheating temperature, and handling parameters, such as the spray angle and gun velocity, which influence the coating deposition as well as the heat input into the substrate, are examined. The experiments were carried out by using an iron-based cored wire with cast tungsten carbides as filling. The results of both methods are in an acceptable accordance with each other. Different stress fields were observed depending on the parameter settings.

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Section: Introductionmentioning

confidence: 99%

Process Parameter Settings and Their Effect on Residual Stresses in WC/W2C Reinforced Iron-Based Arc Sprayed Coatings

2017

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“…In (Ref [5][6][7][8][9][10][11][12][13][14][15]) some other research works concerning particle and plume properties as well as the resulting coating properties are presented.…”

Section: Introductionmentioning

confidence: 99%

Investigation about the Chrome Steel Wire Arc Spray Process and the Resulting Coating Properties

et al. 2007

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Nowadays, wire-arc spraying of chromium steel has gained an important market share for corrosion and wear protection applications. However, detailed studies are the basis for further process optimization. In order to optimize the process parameters and to evaluate the effects of the spray parameters DoE-based experiments had been carried out with high-speed camera shoots. In this article, the effects of spray current, voltage, and atomizing gas pressure on the particle jet properties, mean particle velocity and mean particle temperature and plume width on X46Cr13 wire are presented using an online process monitoring device. Moreover, the properties of the coatings concerning the morphology, composition and phase formation were subject of the investigations using SEM, EDX, and XRD-analysis. These deep investigations allow a defined verification of the influence of process parameters on spray plume and coating properties and are the basis for further process optimization.

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“…Figure a shows the cross‐sectional microstructure of as‐sprayed IN617 formed at a N 2 spray chamber pressure 1.7 ± 0.3 kPa below atmospheric pressure throughout, again showing the distinct layered structure. Energy dispersive X‐ray analysis in the scanning electron microscopy suggested that the delineating dark regions between droplets/layers primarily comprised Al and O, indicative of droplet oxidation during spraying . When the chamber pressure was 0.4 ± 0.3 kPa lower than atmosphere in Fig.…”

Section: Resultsmentioning

confidence: 84%

A hybrid arc spray forming technique for the manufacture of nickel superalloy IN617

Sato

Taneike

Okada

et al. 2014

Materialwissenschaft Werkst

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Spray forming produces cast microstructures with comparatively low macro-and micro-structural chemical segregation and is thus well-suited for the manufacture of complex chemistry, multi-component alloys that otherwise show strong elemental segregation. Although spray formed Ni superalloys have shown properties equivalent or superior to their conventionally cast/wrought counterparts, they have not been adopted commercially because of the difficulties in ensuring a high process yield and the complexity and associated cost of large-scale Ni superalloy melting. In this paper, we describe a hybrid arc spray forming (HASF) process in which costly, large-scale alloy melting as pre-cursor to spray forming is avoided by the use of a consumable wire feedstock. To achieve thermal conditions of melt spray formingessential to produce a refined, polygonal grain structure -a customised secondary atomisation system has been developed. Fe-0.8 wt%C and Ni superalloy IN617 microstructures and preliminary mechanical properties suggested that hybrid arc spray forming may offer an attractive combination of convenience, low cost and mechanical performance.

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Oxidation during electric arc spray forming of steel

Cited by 60 publications

References 10 publications

Process Parameter Settings and Their Effect on Residual Stresses in WC/W2C Reinforced Iron-Based Arc Sprayed Coatings

Process Parameter Settings and Their Effect on Residual Stresses in WC/W2C Reinforced Iron-Based Arc Sprayed Coatings

Investigation about the Chrome Steel Wire Arc Spray Process and the Resulting Coating Properties

A hybrid arc spray forming technique for the manufacture of nickel superalloy IN617

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