Abstract
In the present study, WC.CO-NiCrAlYSi(35%-65%) cermet coatings were deposited on a Fe-based super alloy designated as SS316 (Midhani Grade) to reduce the damage caused by erosion boiler applications. Erosion studies were conducted on uncoated as well as HVOF coated steels. The erosion experiments were carried out using an air-jet erosion test rig according to ASTM G-76 standard at a velocity of 30 m/s and at different impingement angles of 30°, 60° and 90°. Alumina particles of size ranging between 50 and 80 μm were used as erodent. Analysis of weight-loss data and Volumetric steady state erosion rates for different coatings and substrate alloys are evaluated. The bare SS316 steel followed ductile erosion mode where as WC.CO-NiCrAlYSi(35%-65%) coating exhibited brittle behaviour respectively. Selection and/or Peer-review under responsibility of The First Materials Research Society of Thailand International Conference.
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