MICROSTRUCTURE AND PROPERTIES OF HEAT-AFFECTED HVOF SPRAYED HASTELLOY C-276 COATING

1 HOUDKOVÁ Šárka
Co-authors:
1 VOSTŘÁK Marek 1 ČESÁNEK Zdeněk 1 GLANC Aleš 1 SMAZALOVÁ Eva
Institution:
1 University of West Bohemia, Plzeň, Univerzitní 8, Czech Republic, EU, houdkov@ntc.zcu.cz
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1104-1109
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
19 views / 10 downloads
Abstract

The influence of heat treatment on the microstructure, mechanical and sliding wear properties of Hastelloy C-276 HVOF sprayed coatings was evaluated. The applied furnace heat treatment modified the coatings microstructure, leading to precipitation hardening and oxidation of inter-splat boundaries, but had a negative effect on the sliding wear resistance. The laser heat treatment eliminated the intersplat boundaries and porosity. The obtained dendritic microstructure have lower microhardness compare to as sprayed coating, which implies higher toughness possibly being beneficial to avoid the brittle fracture during wear loading.

Keywords: Hastelloy C-276, HVOF, laser remelting, heat treatment, mechanical properties
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