HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis

The aims of this study were: (1) to produce composite coatings by high velocity oxy fuel (HVOF) spraying with steel matrix reinforced by cermets (a) Cr₃C₂–20%Ni and (b) TiC–20%NiMo, manufactured by mechanically activated synthesis (MAS); (2) to synthesize in situ a carbide reinforcement for iron matrix from a mixture of titanium and carbon during HVOF reactive thermal spraying (RTS); (3) to compare the wear resistance of produced coatings. As a reference, HVOF sprayed coatings from commercial Cr₃C₂–25%NiCr (Amperit 588.074) and AISI 316L were utilized. Study of microstructure revealed the inhomogeneity of the Cr-based MAS coating; the Ti-based MAS coating had typical carbide granular structure, and the Ti-based RTS coating possessed elongated structures of TiC. The X-ray diffraction revealed two main phases in the Cr-based MAS coating: Cr₃C₂ and austenite, and two phases in the Ti-based coatings: TiC and austenite. Among the studied coatings, the Cr-based MAS coating demonstrated the highest low-force hardness (490 HV0.3). During the abrasive rubber wheel test (ASTM G65), the Ti-based MAS coating showed the best wear resistance, followed by Cr₃C₂–25%NiCr and Ti-based RTS coating. In the abrasive–erosive test (GOST 23.201-78), the Ti-based MAS coating was 44% better than Cr₃C₂–25%NiCr coating. The Ti-based RTS coating was 11% more wear resistant than the reference Cr₃C₂–25%NiCr coating. View Full-Text

Keywords: mechanically activated synthesis; in situ synthesis; powder; TiC–NiMo; Cr₃C₂–Ni; coating; thermal spray; abrasive wear

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MDPI and ACS Style

Tkachivskyi, D.; Juhani, K.; Surženkov, A.; Kulu, P.; Tesař, T.; Mušálek, R.; Lukáč, F.; Antoš, J.; Vostřák, M.; Antonov, M.; Goljandin, D. HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis. Coatings 2020, 10, 1092. https://doi.org/10.3390/coatings10111092

AMA Style

Tkachivskyi D, Juhani K, Surženkov A, Kulu P, Tesař T, Mušálek R, Lukáč F, Antoš J, Vostřák M, Antonov M, Goljandin D. HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis. Coatings. 2020; 10(11):1092. https://doi.org/10.3390/coatings10111092

Chicago/Turabian Style

Tkachivskyi, Dmytro, Kristjan Juhani, Andrei Surženkov, Priit Kulu, Tomáš Tesař, Radek Mušálek, František Lukáč, Jakub Antoš, Marek Vostřák, Maksim Antonov, and Dmitri Goljandin. 2020. "HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis" Coatings 10, no. 11: 1092. https://doi.org/10.3390/coatings10111092

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HVOF Sprayed Fe-Based Wear-Resistant Coatings with Carbide Reinforcement, Synthesized In Situ and by Mechanically Activated Synthesis

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