A study on abrasive resistance of Ni-based coatings with a WC hard phase

Wang, Hui; Xia, Weiming; Jin, Yuansheng

doi:10.1016/0043-1648(95)06762-0

Cited by 101 publications

(47 citation statements)

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“…The measurement distribution of particle size on WC powders (TungTec 10112) shows that WC carbide particles have a size range of 64-140 μm. [8,9]. Besides, there are also phases of nickel, chromium, boron and silicon with a high enough intensity, which are in agreement with the mill certificate.…”

Section: Results Powder Morphology and Phase Identificationsupporting

confidence: 68%

“…Increasing number of WC presence in the coating seems too increase the micro hardness, which is expected to increase the wear of the tool steel surface. This result is in agreement with the research result conducted by Wang and Franch [8,9], who showed that the presence of WC particles can increase the hardness and wear resistance. Figure 7 shows a graph of preheating temperature of the substrate on the level of porosity formed in the layers.…”

Section: Hardness Distribution and Wear Propertiessupporting

confidence: 83%

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Porosity and wear resistance of flame sprayed tungsten carbide coatings

Winarto

Sofyan

Rooscote³

2017

AIP Conference Proceedings

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ARTICLES YOU MAY BE INTERESTED INEffect of bond coat and preheat on the microstructure, hardness, and porosity of flame sprayed tungsten carbide coatings AIP Conference Proceedings 1855, 030016 (2017) Abstract. Thermal-sprayed coatings offer practical and economical solutions for corrosion and wear protection of components or tools. To improve the coating properties, heat treatment such as preheat is applied. The selection of coating and substrate materials is a key factor in improving the quality of the coating morphology after the heat treatment. This paper presents the experimental results regarding the effect of preheat temperatures, i.e. 200ºC, 300ºC and 400ºC, on porosity and wear resistance of tungsten carbide (WC) coating sprayed by flame thermal coating. The powders and coatings morphology were analyzed by a Field Emission Scanning Electron Microscope equipped with Energy Dispersive Spectrometry (FE-SEM/EDS), whereas the phase identification was performed by X-Ray diffraction technique (XRD). In order to evaluate the quality of the flame spray obtained coatings, the porosity, micro-hardness and wear rate of the specimens was determined. The results showed that WC coating gives a higher surface hardness from 1391 HVN up to 1541 HVN compared to that of the non-coating. Moreover, the wear rate increased from 0.072 mm 3 /min. to 0.082 mm 3 /min. when preheat temperature was increased. Preheat on H13 steel substrate can reduce the percentage of porosity level from 10.24 % to 3.94% on the thermal spray coatings.

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Section: Results Powder Morphology and Phase Identificationsupporting

confidence: 68%

Section: Hardness Distribution and Wear Propertiessupporting

confidence: 83%

Porosity and wear resistance of flame sprayed tungsten carbide coatings

Winarto

Sofyan

Rooscote³

2017

AIP Conference Proceedings

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“…The presence of big ceramic grains can enhance the wear resistance properties of the coating, especially when abrasive wear mechanisms are involved. 18 As in the previous case, they show a main orientation along the cooling direction. This anisotropy imposed by cooling processes is possibly responsible for the preferential orientation of the (112) crystalline direction observed in XRD analyses.…”

Section: Discussionsupporting

confidence: 51%

Structural characterization of laser-treated Cr₃C₂–NiCr coatings

et al. 2001

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The interconnected porosity of the Cr 3 C 2 -NiCr coatings obtained by high-velocity oxy fuel spraying is detrimental in corrosion and wear resistance applications. Laser treatments allow sealing of their surfaces through melting and resolidification of a thin superficial layer. A Nd:YAG laser beam was used to irradiate Cr 3 C 2 -NiCr coatings either in the continuous wave mode or at different repetition rates in the pulsed one. Results indicated that high peak and low mean laser irradiances are not good, since samples presented deep grooves and an extensive crack network. At low peak and higher mean laser irradiances the surface was molten, and only a few shallow cracks were observed. The interconnected porosity was completely eliminated in a layer up to 80 m thick, formed by large Cr 7 C 3 grains imbedded in a NiCr matrix.

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“…The abrasive wear rate is found to increase with increasing carbide grain size when examined with abrasive that is slightly larger than the carbide itself [21][22][23][24]. A study on the addition of WC to a nickel-based coating demonstrated that increasing the carbide content resulted in a decrease in the wear rate as the carbide prevented abrasive penetration into the surface [25]. Van Acker et al [26] conducted abrasion tests on a nickel alloy reinforced with much larger carbides (between 30 µm to 150 µm) and observed preferential wear of the nickel alloy surrounding the WC particles, but with no significant dependence of wear rate on the carbide particle size.…”

Section: Introductionmentioning

confidence: 99%

Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type

Kamdi

Shipway

Voisey

et al. 2011

Wear

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. (2011) Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type. Wear, A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Scale effects in cermet abrasionPage 1 Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type AbstractAbrasive wear behaviour of materials can be assessed using a wide variety of testing methods, and the relative performance of materials will tend to depend upon the testing procedure employed. In this work, two cermet type coatings have been examined, namely (i) a conventional tungsten carbide-cobalt thermally sprayed coating with a carbide size of between 0.3 -5 µm and (ii) a tungsten carbide-nickel alloy weld overlay with large spherical carbides of the order of 50 -140 µm in diameter (DuraStell). The wear behaviour of these two materials has been examined by the use of two abrasion tests, namely the micro-scale abrasion test using both silica and alumina abrasives (typically 2-10 µm in size), and the dry sand-rubber wheel test (ASTM G65), again with both silica and alumina abrasives (typically 180 -300 µm in size). It was found that when the abrasive particles were of the same scale or larger than the mean free path between the hard phase particles, then the matrix phase was well protected by the hard phases. Testing (in both test types) with alumina abrasives resulted in wear of both the hard carbide phases and the matrix phases in both the thermally sprayed coating and the weld overlay, with the thermally sprayed coating exhibiting lower wear rates. The wear behaviour of the materials with the more industrially relevant silica abrasive was more complex; the thermally sprayed coating exhibited a lower wear rate than the weld overlay with the fine abrasive in the micro-scale abrasion test due to effective shielding of the matrix from abrasive action due to the fine reinforcement particle size. In contrast, with the coarser silica abrasive in the dry sand-rubber wheel test, the weld overlay with the large carbides was able to provide matrix protection with low rates of wear, whereas the thermally sprayed coating wore by fracture of the more brittle microstructure. These findings demonstrate the importance of selection of appropriate laboratory test procedures and abrasives to simulate behaviour of materials in service environments.

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A study on abrasive resistance of Ni-based coatings with a WC hard phase

Cited by 101 publications

References 5 publications

Porosity and wear resistance of flame sprayed tungsten carbide coatings

Porosity and wear resistance of flame sprayed tungsten carbide coatings

Structural characterization of laser-treated Cr₃C₂–NiCr coatings

Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type

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A study on abrasive resistance of Ni-based coatings with a WC hard phase

Cited by 101 publications

References 5 publications

Porosity and wear resistance of flame sprayed tungsten carbide coatings

Porosity and wear resistance of flame sprayed tungsten carbide coatings

Structural characterization of laser-treated Cr3C2–NiCr coatings

Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type

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Product

Resources

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Structural characterization of laser-treated Cr₃C₂–NiCr coatings