TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Slurry and dry particle erosion wear properties of WC-10Co4Cr and Cr3C2-25NiCr hardmetal coatings deposited by HVOF and HVAF spray processes

Tutkimustuotos

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut58-61
Sivumäärä4
JulkaisuTribologia
Vuosikerta36
Numero1-2
DOI - pysyväislinkit
TilaJulkaistu - 2019
OKM-julkaisutyyppiB1 Kirjoitus tieteellisessä aikakauslehdessä

Tiivistelmä

Thermally sprayed hardmetal coatings were produced to provide improved erosion wear compared to conventional cast GX4CrNi13-4 martensitic steel (CA6NM) used in hydro turbine components. Sprayed coatings and reference materials were tested with high-speed slurry pot tester using either fine or coarse quartz as the erosive media. Additional erosion tests were carried out with centrifugal dry erosion tester. Tungsten carbide based coatings provided the highest wear resistance due to the high hardness and even distribution of the fine carbide particles. The cast 13-4 steel samples experienced up to 180 times higher wear rates in fine quartz slurry and up to 36 times higher wear rates in coarse slurry compared to the sprayed coatings.