HVOF Coating Case Study for Power Plant Process Control Ball Valve Application

Vernhes, L.; Lee, David A.; Poirier, Dominique; Li, Duanjie; Klemberg-Sapieha, Jolanta E.

doi:10.1007/s11666-013-9978-8

Cited by 24 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies showed that long-term isothermal holding of Cr 3 C 2 -NiCr coatings at higher temperatures (between 650°C and 900°C) embrittled the matrix by carbide re-precipitation [19,21,22,40]. At 400°C, by contrast, such re-precipitation is not occurring to a perceivable degree; indeed, the cross-sectional micrograph in Fig.…”

Section: Ball-on-disk Sliding Wear Testing -400°cmentioning

confidence: 80%

See 1 more Smart Citation

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Bolelli

Berger

Börner

et al. 2016

Wear

130

View full text Add to dashboard Cite

This paper provides a comprehensive characterisation of HVOF-and HVAF-sprayed Cr 3 C 2-25 wt.% NiCr hardmetal coatings. One commercial powder composition with two different particle size distributions was processed using five HVOF and HVAF thermal spray systems. All coatings contain less Cr 3 C 2 than the feedstock powder, possibly due to the rebound of some Cr 3 C 2rich particles during high-velocity impact onto the substrate. Dry sand-rubber wheel abrasive wear testing causes both grooving and pull-out of splat fragments. Mass losses depend on inter-and intra-lamellar cohesion, being higher (Z 70 mg after a wear distance of 5904 m) for the coatings deposited with the coarser feedstock powder or with one type of HVAF torch. Sliding wear at room temperature against alumina involves shallower abrasive grooving, small-scale delamination and carbide pull-outs, and it is controlled by intra-lamellar cohesion. The coatings obtained from the fine feedstock powder exhibit the lowest wear rates (E5x10 À 6 mm 3 /(Nm)). At 400°C, abrasive grooving dominates the sliding wear behaviour; wear rates increase by one order of magnitude but friction coefficients decrease from E0.7 to E 0.5. The thermal expansion coefficient of the coatings (11.08x10 À 6°C À 1 in the 30-400°C range) is sufficiently close to that of the steel substrate (14.23x 10 À 6°C À 1) to avoid macro-cracking.

show abstract

Section: Ball-on-disk Sliding Wear Testing -400°cmentioning

confidence: 80%

“…Tribological testing included dry particle abrasion and sliding wear at room temperature and at 400°C, a temperature which is pertinent to important industrial application fields such as ball valves for the oil and gas industry, as shown e.g. by manufacturers' catalogues [39,40].…”

Section: Introductionmentioning

confidence: 99%

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Bolelli

Berger

Börner

et al. 2016

Wear

130

View full text Add to dashboard Cite

show abstract

“…Li et al (2019b) also fabricated the Ti 3 SiC 2 /Co-based coatings by laser cladding (LC), and revealed that the Ti 3 SiC 2 was partially dissolved to form TiC, which enhanced the coating hardness and wear resistance. As a result, NiCr-Ti 3 SiC 2 coatings are considered as application value to improve the anti-corrosion and wear resistance of components such as ball valves, pump impellers, calendar rollers and hydraulic turbines in petrochemical and power generation fields (Liu et al , 2023; Llewellyn et al , 2004; Karlsen, 2006; Vernhes et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti₃SiC₂ mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature

Chengwen

Dejun

2023

ILT

View full text Add to dashboard Cite

Purpose This paper aims to investigate the effect of Ti3SiC2 on the high-temperature tribological behaviors of NiCr coating, which was beneficial to improve the friction-wear performance of hot work mold. Design/methodology/approach NiCr-Ti3SiC2 coatings were prepared on H13 steel substrate by laser cladding. The microstructure, phases and hardness of obtained coatings were analyzed using a super-depth of field microscope, X-ray diffraction and microhardness tester, respectively, and the tribological performance of obtained coatings at 500°C was investigated using a high-temperature tester. Findings The results show the NiCr-Ti3SiC2 coatings are comprised of γ-Ni solid, solution, TixNiy, TiC and Ti3SiC2 phases, and the coating hardness is increased with the increase of Ti3SiC2 mass fraction, which is contributed to the fine-grain and dispersion strengthening effect by the addition of Ti3SiC2. The NiCr-Ti3SiC2 coatings present excellent friction reduction and wear resistance by the synergetic action of Ti3SiC2 lubricant and hard phase, and the wear mechanism is predominated by abrasive wear and oxidation wear. Originality/value Ti3SiC2 phase was used to reinforce the tribological performance of H13 steel at high temperature, and the roles of friction reduction and wear resistance were discussed. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2023-0004/

show abstract

“…Beschichtungen aus Cr 3 C 2 /NiCr bieten zudem einen hohen Korrosionsschutz und finden bei der Regulierung von Wasserdampf oder Gasen Anwendung, z. B. CO 2 oder H 2 S [3,4]. In extremen Umgebungsbedingungen bei denen eine äußerst hohe Korrosionsbeständigkeit gewährleistet werden muss, kommen zudem keramische Beschichtungen wie TiO 2 oder Cr 2 O 3 zum Einsatz.…”

Section: Introductionunclassified

Thermally sprayed coatings for the valve industry

Bobzin

Engler

Joung

et al. 2021

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In dieser Studie wird die Entwicklung verschiedener thermisch gespritzter Beschichtungen für den Einsatz im Armaturenbau diskutiert. Basierend auf etablierten Verschleißschutzschichten der Armaturenindustrie wurden verschiedene Festschmierstoffe in diese Beschichtungen integriert, um das Verschleiß-und Reibungsverhalten bei anwendungsnahen Belastungen für Armaturen zu verbessern. Für die Anwendungen wurden Verschleißschutzschichten auf Basis von WC/CoCr und Cr 3 C 2 /NiCr entwickelt. Als Festschmierstoffe wurden nickelumhülltes Graphit und hexagonales Bornitrid untersucht. Die Verfahrensvarianten Hochgeschwindigkeitsflammspritzen mit Sauerstoff (HVOF) und das neuartige Ultrahochgeschwindigkeitsflammspritzen (UH-VOF) wurden untersucht. Die Ergebnisse zeigen, dass durch eine passende Beschichtungszusammensetzung eine Reduktion des Verschleißes von 53 % und der Reibung von 31 % unter anwendungsnahen Belastungen möglich ist.Schlüsselwörter: Armaturenbau / Festschmierstoffe / Reibung / Verschleiß / Korrosion / Thermisches Spritzen This study discusses the development of various thermally sprayed coatings for the use in the valve industry. Based on established coating systems for wear protection, different solid lubricants were integrated into these coatings in order to optimize the wear and friction behavior at application oriented loads. Wear protection coatings based on WC/CoCr and Cr 3 C 2 /NiCr were applied. As solid lubricants, nickel-encapsulated graphite and hexagonal boron nitride were investigated. The thermal spraying processes high velocity oxygen fuel flame spraying (HVOF) and the novel ultra high velocity flame spraying (UHVOF) were investigated. The results show that through an appropriate coating composition a wear reduction of 53 % and a friction reduction of 31 % are possible.

show abstract

HVOF Coating Case Study for Power Plant Process Control Ball Valve Application

Cited by 24 publications

References 25 publications

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Effect of Ti₃SiC₂ mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature

Thermally sprayed coatings for the valve industry

Contact Info

Product

Resources

About

HVOF Coating Case Study for Power Plant Process Control Ball Valve Application

Cited by 24 publications

References 25 publications

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Sliding and abrasive wear behaviour of HVOF- and HVAF-sprayed Cr3C2–NiCr hardmetal coatings

Effect of Ti3SiC2 mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature

Thermally sprayed coatings for the valve industry

Contact Info

Product

Resources

About

Effect of Ti₃SiC₂ mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature