Sliding wear behaviour of conventional and nanostructured HVOF sprayed WC–Co coatings

Shipway, P.H.; McCartney, D.G.; Sudaprasert, Tippaban

doi:10.1016/j.wear.2005.02.059

Cited by 216 publications

(120 citation statements)

References 15 publications

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“…During spraying of WC-Co powders, significant changes in the chemical and phase compositions can occur [1]. The past two decades have seen extensive research in optimizing the feedstock powder characteristics, process parameters and post-treatments of wear-resistant hardmetal coatings [2][3][4][5][6][7][8][9][10][11][12][13][14]. Most research, however, has related to the coatings sprayed from agglomerated and sintered powders, with the typical particle size ranging from 10 to 50 lm and WC grain size ranging from 0.8 to 3.5 lm [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The past two decades have seen extensive research in optimizing the feedstock powder characteristics, process parameters and post-treatments of wear-resistant hardmetal coatings [2][3][4][5][6][7][8][9][10][11][12][13][14]. Most research, however, has related to the coatings sprayed from agglomerated and sintered powders, with the typical particle size ranging from 10 to 50 lm and WC grain size ranging from 0.8 to 3.5 lm [2][3][4][5][6][7]. Optimization of these coatings has resulted in coating microstructures with negligible porosity, high fracture toughness and minimization of secondary carbide phases [2][3][4][5][6][7][8][9][10][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Most research, however, has related to the coatings sprayed from agglomerated and sintered powders, with the typical particle size ranging from 10 to 50 lm and WC grain size ranging from 0.8 to 3.5 lm [2][3][4][5][6][7]. Optimization of these coatings has resulted in coating microstructures with negligible porosity, high fracture toughness and minimization of secondary carbide phases [2][3][4][5][6][7][8][9][10][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

et al. 2017

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The potential to improve the tribomechanical performance of HVOF-sprayed WC-12Co coatings was studied by using aqueous WC-12Co suspensions as feedstock. Both as-sprayed and hot-isostatic-pressed (HIPed) coatings were studied. Mathematical models of wear rate based on the structure property relationships, even for the conventionally sprayed WC-Co hardmetal coatings, are at best based on the semiempirical approach. This paper aims to develop these semiempirical mathematical models for suspension sprayed nanocomposite coatings in as-sprayed and heat-treated (HIPed) conditions. Microstructural evaluations included transmission electron microscopy, X-ray diffraction and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy. The nanohardness and modulus of the coated specimens were investigated using a diamond Berkovich nanoindenter. Sliding wear tests were conducted using a ball-on-flat test rig. Results indicated that the HIPing post-treatment resulted in crystallization of amorphous coating phases and increase in elastic modulus and hardness. Influence of these changes in the wear mechanisms and wear rate is discussed. Results are also compared with conventionally sprayed high-velocity oxy-fuel hardmetal WC-Co coatings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

et al. 2017

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“…5) [7]. However, Shipway et al have explained, it was possible that surface material loss can be caused predominantly by pullout of tungsten carbide particles and also by subsurface cracking (caused by the presence of the highly decomposed regions within the microstructure) and therefore, higher wear rates can be expected for specimens heat treated in the air [20]. Jahanmer et al have successfully used the wear delamination theory for explaining studying wear of coatings [18].…”

Section: Analysis Of Wear Tracksmentioning

confidence: 99%

“…Saha et al have reported that the mechanism of abrasive wear of the coatings is by micro-cutting and plastic deformation and not by brittle fracture [19]. Shipway et al have reported that for the carbide-based cermet coatings during sliding wear test, surface material removal can be initiated by carbide particle pullout and can be continued by subsurface cracking which can result in higher wear rates [20]. Stocia et al have reported that heat treatment of thermal spray cermet coatings can increase their wear resistance as a result of elimination of the W 2 C phase and improvement of metallurgical bonding at the interface between the constituent lamellae of the coating [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Wear Performance of Nanostructured WC-Ni/Cr HVOF Sprayed Coatings

2017

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The extraction and processing of bitumen from oil sands exposes machinery parts to constant abrasive wear which can cause severe surface degradation and component failure, resulting in production shut-downs. To reduce the effect of wear on performance of production machinery, wear resistant coatings must be used to extend component life. Recently, thick microstructured cermet coatings based on WC dispersions have been used to protect surfaces. In this study a nanostructured 83WC-17Ni/Cr coating was deposited on to C-Mn steel surfaces using High Velocity Oxy-Fuel (HVOF) spraying. The effect of heat treatment in air and nitrogen atmosphere on changes in the microstructure, hardness and wear resistance was investigated. The results showed that both the hardness and wear resistance increased with increasing heat treatment temperature in both air and nitrogen atmosphere. However, the use of heat treatments in air led to the formation of brittle metal oxides which resulted in micro-cracking within the coatings. This caused the coatings to fail by brittle fracture during wear testing. In comparison heat treatment in nitrogen produced better wear resistance because metal oxide formation was avoided.

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Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

Maizza

Cagliero

Iacobone

et al. 2016

Surface & Interface Analysis

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Multimaterial components are more suitable than monolithic materials to combine several mechanical and functional properties simultaneously. Bi‐layer components made of WC‐Co and steel can combine enhanced wear resistance and toughness, which are beneficial for a wide range of advanced tribo‐structural applications. In this study, a new solid‐state capacitor discharge sinter‐welding (CDSW) process has been used to achieve an AISI M2 steel/WC–12% Co joint starting from green compacts. The CDSW process allows very short processing times, which help to prevent the coarsening of steel grains or WC particles, as well as avoid WC decomposition and minimize microstructural defects. The morphological, chemical, and structural characteristics of the phases and interface have been investigated. The results demonstrate an intimate bonding of the two joining materials and a significant diffusion of substitutional elements up to 100–150 µm apart from the interface. Copyright © 2016 John Wiley & Sons, Ltd.

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Sliding wear behaviour of conventional and nanostructured HVOF sprayed WC–Co coatings

Cited by 216 publications

References 15 publications

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings

Effect of Heat Treatment on Wear Performance of Nanostructured WC-Ni/Cr HVOF Sprayed Coatings

Study of steel‐WC interface produced by solid‐state capacitor discharge sinter‐welding

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