Cold Gas Sprayed Stellite-6 Coatings and their Wear Resistance

Cinca, N.; Guilemany, J.M.

doi:10.4172/2169-0022.1000122

Cited by 8 publications

(9 citation statements)

References 23 publications

(24 reference statements)

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“…The XRD peaks revealed the presence of the HCP phase in both samples. The martensitic transformation was reported by some authors for CGS stellite alloy coatings [4,38,71]. As shown, there are two main differences between the XRD peaks before and after the wear test.…”

Section: Wear Behaviormentioning

confidence: 53%

“…There are similarities in the microstructural evolutions of the material in mechanical milling and CGS [31]. It has been shown that severe plastic deformation of cold sprayed stellite particles leads to a large number of twins in the coating [38], which, in turn, increases the microhardness of the coating comparing to that of the feedstock. A higher value of defects in HVOF sprayed layer, and powder melting during the process decreases the microhardness of the coatings.…”

Section: Microhardnessmentioning

confidence: 99%

“…The hcp crystals promote work hardening of tribolayer [4]. The hcp crystals promote work hardening of tribo-layer [69] and have a lower friction coefficient and higher wear resistance [8,33,38]. In this regard, by accumulation of enough damage, the tribo-layer delaminates and the wear proceeds [1,70].…”

Section: Wear Behaviormentioning

confidence: 99%

“…The wear and microstructural evolution of CGS sprayed stellite alloys were reported by different authors. Cinca et al [22,38] showed that a dense Stellite-6 coating with good wear resistance is achievable by CGS. In addition, cold spraying of the Stellite-based coating with promising properties in terms of microstructure compactness and coating hardness on a steel substrate is reported [39].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Stellite coatings on low carbon steel produced by CGS and HVOF spraying

Seraj

Abdollah-zadeh

Dosta

et al. 2019

Surface and Coatings Technology

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Stellite alloys are of great interest in industries due to a unique combination of high temperature mechanical strength, outstanding wear and corrosion resistance.Different thermal spraying processes are used for deposition of stellite alloys on industrial components. However, the investigations on the structure-property relationship of these alloys produced via different deposition process are limited.This study focuses on the microstructure, oxidation, and tribo-mechanical properties of Stellite 21 deposited by cold gas spraying (CGS) and high velocity oxy-fuel (HVOF) process on a low carbon steel substrate. The coating crosssection was characterized by SEM and optical microscopy. The coatings were further characterised by using nanoindentation, adhesion, and ball-on-disk wear tests. Moreover, XRD tests were run on the powder and the coatings to reveal possible phase transformation during spraying, as well as during wear and oxidation tests. The results showed no phase transformation in the as-sprayed CGS coating, besides higher values of porosity and oxide phase in the HVOF coating. However, an fcc-to-hcp phase transformation occurs at the surface layer of both types of coating during the ball-on-disk wear test. The presence of continuous oxide networks in HVOF coatings leads to delamination during the wear test. Overall, the CGS Stellite 21 coatings exhibit better performance than HVOF coatings in wear and oxidation tests.

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Section: Wear Behaviormentioning

confidence: 53%

Section: Microhardnessmentioning

confidence: 99%

Section: Wear Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of Stellite coatings on low carbon steel produced by CGS and HVOF spraying

Seraj

Abdollah-zadeh

Dosta

et al. 2019

Surface and Coatings Technology

View full text Add to dashboard Cite

show abstract

“…The effect of process parameters consisting of process gas type, temperature, pressure, and substrate hardness, temperature, and roughness on the coatings' properties have been investigated by different authors [ 19 -22 ] . Cinca et al [1,23,24] deposited Stellite 6 alloy on a steel substrate by the CS. Although they used an optimized value of gas temperature, pressure, and stand-off distance to achieve a dense and adherent coating, the reported DE for the selected parameters was about 20% [24].…”

Section: Introductionmentioning

confidence: 99%

The effect of traverse speed on deposition efficiency of cold sprayed Stellite 21

Seraj

Abdollah-zadeh

Dosta

et al. 2019

Surface and Coatings Technology

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Cold spraying of Stellite 21 powder on low carbon steel is performed to investigate the effect of traverse speed on the deposition efficiency (DE) of high-temperature alloys. Based on the simulation of particles' impact temperature and velocity, the initial experiments are performed at different gas pressures (32 and 40bar), temperatures (800 and 730℃), and stand-off distances (10, 25, and 40mm) at a constant traverse speed of 20mm.s -1 . The experiments showed that high pressure, temperature, and short stand-off distance are preferred. The wipe test results indicated a potential of high DE at lower deposition flux over the substrate surface area at the first layer deposition. Thus, new tests are carried out at different traverse speeds ranging from 20 to 400mm.s -1 to adjust the deposition flux over the surface area of the substrate. The effect of traverse speed on DE and coating characteristics such as porosity and microhardness is studied as well. The results showed that the lower DE at lower traverse speed is related to the erosion of bonded particles due to the subsequent particles' impact. By increasing the traverse speed from 20 to 300mm.s -1 , the DE increased more than twice. Induction time extension at higher traverse speed led to lower DE at 400mm.s -1 .

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IN718 Cold Gas Repair Spray of Large Cavities—Microstructure and Residual Stresses

Lang

Schmitt

Cabeza

et al. 2023

The Minerals, Metals &Amp; Materials Series

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Cold Gas Sprayed Stellite-6 Coatings and their Wear Resistance

Cited by 8 publications

References 23 publications

Comparison of Stellite coatings on low carbon steel produced by CGS and HVOF spraying

Comparison of Stellite coatings on low carbon steel produced by CGS and HVOF spraying

The effect of traverse speed on deposition efficiency of cold sprayed Stellite 21

IN718 Cold Gas Repair Spray of Large Cavities—Microstructure and Residual Stresses

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