The effect of frontal nozzle geometry and gas pressure on the steel coating properties obtained by wire arc spraying

Toma, Ştefan Lucian; Bejinariu, Costică; Baciu, Raluca Elena; Radu, Steluța

doi:10.1016/j.surfcoat.2012.11.011

Cited by 33 publications

(22 citation statements)

References 12 publications

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“…On the one hand, due to the electrode phenomena (e.g., arc, magnetohydrodynamics, and eddies), the TWAS process is associated with an increased spray plume divergence across the spray axis behind the intersection point of the electrode tips. The spray plume characteristics were discussed by numerous authors [2,[51][52][53][54][55][56][57][58]. On the other hand, limitations of the robot dynamics (depending on the path planning strategy) can lead to deviating spray angles and velocities (e.g., gun velocities) along the robot's path [52].…”

Section: Coating Depositionmentioning

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: Coating Depositionmentioning

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 this way, a turbulence control method for the separation process of the solid components from heterogeneous mixtures can be established. Moreover, in our opinion, turbulence control can be related to practical applications such as suspension plasma sprayed or DC magnetron sputtering (for details see [80][81][82][83]). …”

Section: Discussionmentioning

confidence: 99%

Solid components separation from heterogeneous mixtures through turbulence control

et al. 2015

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“…The concentric nozzle system, together with the module body, forms two compressed air circuits [32,33], as presented in Figure 7:…”

Section: Preparation and Characterization Of Depositsmentioning

confidence: 99%

Hard Alloys with High Content of WC and TiC—Deposited by Arc Spraying Process

Toma¹,

Haraga²,

Chicet³

et al. 2021

Welding - Modern Topics

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Obtained by different spraying technologies: in atmospheric plasma spray, High Velocity Oxygen Fuel (HVOF) or laser cladding, the layers of hard alloys with a high content of WC and TiC find their industrial applications due to their high hardness and resistance to wear. Recognized as being a process associated with welding, the arc spraying process is a method applied industrially both in obtaining new surfaces and for reconditioning worn ones. This chapter presents the technology for obtaining ultra-hard layers based on WC and TiC - by the arc spraying process, using a classic spray device equipped with a conical nozzle system and tubular wire additional material containing ultra-hard compounds (WC, TiC). To study both the quality of deposits and the influence of thermal spray process parameters on the properties of deposits with WC and TiC content, we approached various investigative techniques, such as optical scanning microscopy (SEM), X-ray diffraction, and determination of adhesion, porosity, Vickers micro-hardness and wear resistance.

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The effect of frontal nozzle geometry and gas pressure on the steel coating properties obtained by wire arc spraying

Cited by 33 publications

References 12 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

Solid components separation from heterogeneous mixtures through turbulence control

Hard Alloys with High Content of WC and TiC—Deposited by Arc Spraying Process

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