On the applicability of iron-based alloy coatings to different wear conditions

Tommi Varis, Juha Pekka Lagerbom, Tomi Suhonen, Sakari Terho, Jussi Laurila, Petri Vuoristo

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Abstract

Iron-based coatings are often considered as replacement of hard chromium and WC-Co, as they pose lower health and environmental impact. In many cases the combination of mechanical and chemical properties of ferrous based alloys may be satisfactory and their relatively low cost make these coatings an interesting candidate for many applications. This study is inspired by opportunities to harden the ferrous base materials by strain hardening, solid solution strengthening, dispersion strengthening, and precipitation hardening. Already commercially available Fe-based coating materials with precipitates of mixed carbides and borides in the metastable austenitic matrix achieve a high hardness. In this study the cavitation erosion and abrasion resistance of various Fe-based coatings produced by HVAF and HVOF processes were investigated. Two experimental precipitation containing materials were prepared, and the sprayed coatings were tested for abrasive and cavitation erosion wear. In addition to precipitations, the importance of proportion of ferrite and retained austenite phases were studied by affecting the microstructure by heat treatments as the ability of different phases to affect hardening and ductility may become crucial in generating desired material properties. The properties of experimental and some commercial Fe-based alloys are compared with WC-Co and Cr3C2-NiCr coatings by property mapping.
Original languageEnglish
Title of host publicationThermal Spray
Subtitle of host publicationInternational Thermal Spray
PublisherASM International
Pages543-552
Number of pages10
DOIs
Publication statusPublished - 4 May 2022
Publication typeB3 Article in conference proceedings
EventInternational thermal spray conference - Wien, Austria
Duration: 4 May 20226 May 2022

Publication series

NameProceedings of the International Thermal Spray Conference
PublisherHigh Temperature Society of Japan
ISSN (Electronic)1341-3074

Conference

ConferenceInternational thermal spray conference
Abbreviated titleITSC2022
Country/TerritoryAustria
CityWien
Period4/05/226/05/22

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