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

• Autorzy: Jonda Ewa , Myalska-Głowacka Hanna , Łatka Leszek , Szymański Krzysztof , Dziekońska Małgorzata

Identyfikatory

DOI

10.2478/msp-2024-0002

• Języki publikacji: EN

Abstrakty

EN

The purpose of this work was to carry out comparative studies of WC-Co-Cr coatings deposited using the high velocity oxy fuel (HVOF) method onto two types of substrate material: structural steel S235 and magnesium alloy AZ31. The influence of the substrate material type on the microstructure, phase composition, crystallite size, porosity, Vickers microhardness, instrumental hardness (H_IT), Young’s modulus (E_IT), and fracture toughness was investigated. For both substrates, the deposited coatings deposited were characterized with fine-grained and compact microstructure. The X-ray diffraction (XRD) revealed presence of following phases: WC, W₂C, Co_0.9W_0.1, and Co₃W₉C₄. The WC phase was the most desirable and stable one with crystallites were below 100 nm. On the other hand, the size of the W₂C crystallites was below 30 nm. The coatings obtained showed porosity values equal to 2.3 ± 0.4 vol% and 2.8 ± 0.7 vol% for AZ31 and S235, respectively. The average Vickers microhardness for both types of sample was appproximately 1200 HV0.3. The average H_IT values for carbide particles and metallic matrix were around 29 GPa and 6.5 GPa, respectively. In the case of E_IT, it was around 620 GPa and 190 GPa for WC and Co-Cr, respectively. The differences between coatings were negligible. The E_IT value for both coatings was equal to 344 ± 11 GPa. The fracture toughness was around 4.5 MPa · m^1/2 in both cases. The investigations revealed that it is possible to replace steel substrate material with a much lighter equivalent, in this case AZ31 alloy, without deterioration of the coating properties.

Słowa kluczowe

EN

structural steel; magnesium alloy; cermet coating; HVOF; high velocity oxy fuel; mechanical properties; microstructure; phase analysis

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2024
• Tom: Vol. 42, No. 1
• Strony: 32--41
• Opis fizyczny: Bibliogr. 66 poz., rys., tab.

Twórcy

autor

Jonda Ewa

• Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18a, 44100 Gliwice, Poland

autor

Myalska-Głowacka Hanna

• Faculty of Materials Engineering, Silesian University of Technology, ul. Krasińskiego 8, 40019 Katowice, Poland

autor

Łatka Leszek

• Department of Metal Forming, Welding and Metrology, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, ul. Łukasiewicza 5., 50371 Wrocław, Poland

autor

Szymański Krzysztof

• Silesian University of Technology, Department of Metallurgy and Recycling, ul. Krasińskiego 8, 40-019 Katowice, Poland

autor

Dziekońska Małgorzata

• Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18a, 44100 Gliwice, Poland

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