Application of HVOF WC-Co-Cr coatings on the internal surface of small cylinders: Effect of internal diameter on the wear resistance

Pulsford, J.; Venturi, Federico; Pala, Zdeněk; Kamnis, Spyros; Hussain, Tanvir

doi:10.1016/j.wear.2019.202965

Cited by 31 publications

(9 citation statements)

References 17 publications

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“…Each WC10Co4Cr and WC17Co coatings formed hard carbide phases WC and W2C as written in Equation 1, but the concentration of W2C was higher than the WC phase [8]. This was attributed to the decomposition of WC at elevated temperatures to form a semicarbide phase W 2 C according to Equation 1 [9], the high temperature referred to HVOF thermal spraying process, as indicated in Equation 2, the decomposition is continued to form free carbon, and further reaction C and O were combined to form CO gas as written in Equation 3 [10].…”

Section: Research Resultsmentioning

confidence: 99%

Cyclic Oxidation Behavior of HVOF Thermally Sprayed WC Cermet Based on AISI 1045 Steel

Waldi¹,

Samudra²,

Leksana

et al. 2023

Majalah Ilmiah Pengkajian Industri

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Thermal spray coating technology High-Velocity Oxygen Fuel (HVOF) has become one of solution for metal protect and parts recondition that work in critical environments such as oxidative, erosive, and corrosive. One of the thermal spray coatings (TSC) application has been carried out to improve the oxidation resistance of the Induce Draft Fan (IDF) as a part on coal fired steam power plant unit. Cermet WC10Co4Cr and WC17Co are intended to sustain the AISI 1045 steel substrate against the oxidative environment. In this works, the cyclic oxidation at a temperature 500oC were conducted to reveal the oxidation resistance behavior of the coatings. Several mechanical tests are also presented including surface roughness of the coatings, coatings microhardness, and coatings adhesion. The coatings morphology was also characterized using SEM microscope, as well as X-ray diffraction (XRD) for phase analysis after the oxidation test. KeywordHVOF, Oxidation resistance, Induce draft fan.

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Section: Research Resultsmentioning

confidence: 99%

Cyclic Oxidation Behavior of HVOF Thermally Sprayed WC Cermet Based on AISI 1045 Steel

Waldi¹,

Samudra²,

Leksana

et al. 2023

Majalah Ilmiah Pengkajian Industri

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“…Furthermore, the diffraction pattern of the coated condition exhibited other phases such as W 2 C, η (Co 3 W 3 C) as well as the hard chromium carbides Cr 23 C 6 and Cr 7 C 3 which resulted from the decarburization of WC leading to free Cr and C hence promoting the formation of these carbides [6]. Worth noting that a minute Co peak was identified in the powder condition whereas it was absent in the coated one and appeared instead a broad peak of Co 3 W 3 C within a diffraction angle of 37~45 • [20,24], which is similar to that reported earlier in several works [12,24,25]. The reason for this broadening is the amorphous phase that resulted from the rapid cooling of the molten Co-Cr binder upon impacting the cold substrate [6,12].…”

Section: Xrd Of Wc-10co-4cr In Powder and Coating Conditionsmentioning

confidence: 99%

Comparative Study into Microstructural and Mechanical Characterization of HVOF-WC-Based Coatings

2022

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The main objective of this work was to characterize and compare the microstructural and mechanical properties as well as erosion resistance of WC-12Co and WC-10Co-4Cr coatings. The High Velocity Oxy Fuel (HVOF) process was applied to carbon manganese steel API 2H typically used in oil and gas industries. Microstructural characterization of feedstock powder and coatings was conducted using scanning electron microscope (SEM), energy dispersive X-ray spectroscopic (EDS) analysis, X-ray diffraction (XRD) for phase determination, powder particle size distribution, and surface roughness measurement. The average particle size of the former powder was 13.7 µm whereas it was 28.1 µm for the latter. The results showed that the smaller particle size tends to melt easier than the larger one, as deduced from SEM images and surface roughness measurements. EDS and XRD results of both coatings indicated the occurrence of WC decomposition where the powder particle size plays a significant role in these results. Mechanical characterization was discussed through comparing hardness, erosion, and adhesion test results of both coatings. WC-10Co-4Cr coating exhibited higher hardness than WC-12Co as well as higher erosion resistance, due to the extent of decomposition of WC and also to carbide particle size within the coating layer; these are the same reasons for the superior adhesion strength of the former coating compared to the latter one as per ASTM Standard “C633- 13”.

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“…This technology allows to significantly increase the durability and reliability of machine parts, reduce production costs and save materials and energy. In particular, carbide coatings formed by thermal spraying techniques have attracted the interest of researchers due to their high wear resistance, resistance to high-temperature corrosion, and meeting the most stringent conditions for demanding power applications [69].…”

Section: Analysis Of the Influence Of Coatings On The Wear Of Austeni...mentioning

confidence: 99%

Key Determinants for High-Alloyed Cast Irons for Mechanical Engineering

Pacha-Gołębiowska

Piekarska

2022

International Journal of Applied Mechanics and Engineering

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This work presents the factors determining cast iron, and particularly austenitic high-alloy cast iron as a construction material, which is ranked among the leading casting alloys of iron with carbon, mainly due to its very good service properties, which makes it dedicated as a material for automotive castings, pipe and fitting castings and components resistant to elevated temperatures, corrosion and abrasive wear. Construction materials currently used in industry have increasingly better properties and their potential is depleting quickly. This forces the manufacturers to adjust the requirements and production capabilities of cast iron using the most modern technologies that give the expected beneficial economic and operating effects. The paper quotes the results of research in the field of the offered technologies that give special surface features to machine parts made of cast iron by modernising the parameters of the technological process of obtaining high-alloy austenitic cast iron, i.e., by applying coatings, as well as by appropriate surface treatment, the aim of which is and reinforce the material surface with those properties which are important in a given application.

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Application of HVOF WC-Co-Cr coatings on the internal surface of small cylinders: Effect of internal diameter on the wear resistance

Cited by 31 publications

References 17 publications

Cyclic Oxidation Behavior of HVOF Thermally Sprayed WC Cermet Based on AISI 1045 Steel

Cyclic Oxidation Behavior of HVOF Thermally Sprayed WC Cermet Based on AISI 1045 Steel

Comparative Study into Microstructural and Mechanical Characterization of HVOF-WC-Based Coatings

Key Determinants for High-Alloyed Cast Irons for Mechanical Engineering

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