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Comparative analysis of microstructure and selected properties of WC-Co-Cr coatings sprayed by high-velocity oxy fuel on S235 and AZ31 substrates

Ewa Jonda

Ewa Jonda

Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of TechnologyGliwice, Poland
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Jonda, Ewa
, 
Hanna Myalska-Głowacka

Hanna Myalska-Głowacka

Faculty of Materials Engineering, Silesian University of TechnologyKatowice, Poland
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Myalska-Głowacka, Hanna
, 
Leszek Łatka

Leszek Łatka

Department of Metal Forming, Welding and Metrology, Faculty of Mechanical Engineering, Wrocław, University of Science and TechnologyWrocław, Poland
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Łatka, Leszek
, 
Krzysztof Szymański

Krzysztof Szymański

Silesian University of Technology, Department of Metallurgy and RecyclingKatowice, Poland
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Szymański, Krzysztof
 und 
Magłorzata Dziekońska

Magłorzata Dziekońska

Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of TechnologyGliwice, Poland
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Dziekońska, Magłorzata
  
08. Mai 2024
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Online veröffentlicht: 08. Mai 2024
Seitenbereich: 32 - 41
Eingereicht: 13. Feb. 2024
Akzeptiert: 17. März 2024
DOI: https://doi.org/10.2478/msp-2024-0002
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© 2024 Ewa Jonda et al., published by Sciendo
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Fig. 1.

Morphology of the initial feedstock powder: (a) standard view, (b) detailed view
Morphology of the initial feedstock powder: (a) standard view, (b) detailed view

Fig. 2.

Scheme of the HVOF deposition method
Scheme of the HVOF deposition method

Fig. 3.

The surface topography of sprayed coatings: (a) MBS, (b) SBS
The surface topography of sprayed coatings: (a) MBS, (b) SBS

Fig. 4.

The SEM images of the coatings’ cross-sections at low magnification (500x): (a) MBS and (b) SBS
The SEM images of the coatings’ cross-sections at low magnification (500x): (a) MBS and (b) SBS

Fig. 5.

The SEM images of the coatings’ cross-sections at high magnification (10,000x): (a) MBS and (b) SBS
The SEM images of the coatings’ cross-sections at high magnification (10,000x): (a) MBS and (b) SBS

Fig. 6.

XRD patterns for HVOF-sprayed coatings
XRD patterns for HVOF-sprayed coatings

Fig. 7.

Results of crystallite size calculations for WC and W2C phases in the sprayed coatings
Results of crystallite size calculations for WC and W2C phases in the sprayed coatings

HVOF process parameters and sample code

Sample Medium feed rate Spray distance mm
Kerosene l/min Oxygen l/min Nitrogen l/min Powder g/min
SBS1 0.380 950 12 70 300
MBS2 0.435 900 360

Results for surface roughness of the as-sprayed coatings

Sample Ra Rp Rv Rz
SBS 3.36 ± 0.23 10.20 ± 2.14 7.95 ± 1.48 18.10 ± 3.15
MBS 4.28 ± 0.24 11.84 ± 2.47 9.92 ± 1.83 21.77 ± 3.51

Results for CRI calculations

Sample CRI value
SBS 0.915
MBS 0.928

The IIT results for carbide particles and metallic matrix in sprayed coatings

Sample HIT (WC) GPa EIT (WC) GPa HIT (Co-Cr) GPa EIT (Co-Cr) GPa
SBS 29.14 ± 1.91 622 ± 17 6.52 ± 0.47 192 ± 9
MBS 28.65 ± 1.94 624 ± 18 6.46 ± 0.42 193 ± 8
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