0538140 - ÚFP 2021 RIV CH eng J - Journal Article
Tkachivskyi, D. - Juhani, K. - Surženkov, A. - Kulu, P. - Tesař, Tomáš - Mušálek, Radek - Lukáč, František - Antoš, J. - Vostřák, M. - Antonova, M. - Goljandin, D.
HVOF sprayed Fe-based wear-resistant coatings with carbide reinforcement, synthesized in situ and by mechanically activated synthesis.
Coatings. Roč. 10, č. 11 (2020), s. 1-15, č. článku 1092. ISSN 2079-6412. E-ISSN 2079-6412
Institutional support: RVO:61389021
Keywords : Abrasive wear * Coating * Cr C –Ni 3 2 * In situ synthesis * Mechanically activated synthesis * Powder * Thermal spray * TiC–NiMo
OECD category: Materials engineering
Impact factor: 2.881, year: 2020 ; AIS: 0.405, rok: 2020
Method of publishing: Open access
Result website:
https://www.mdpi.com/2079-6412/10/11/1092DOI: https://doi.org/10.3390/coatings10111092

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.
Permanent Link: http://hdl.handle.net/11104/0315962