Abstract
Slurry wear tests were carried out for base metal SCS6, HP/HVOF thermal-sprayed DTS-W110 (1), arc-sprayed 56W 2C/Ni/Cr and spray-fused coating of self-fluxing alloy material 41WC/Ni/Cr/Co. The slurry jet test apparatus was used for the slurry wear test. The flow velocity was 10–40 m/s, and the impingement angle ranged from 90° to 15°. It was found that the volume loss rate of all test materials at 40 m/s is almost constant irrespective of impingement angle between 90° and 60°, and decreases with a decreased angle. Coating hardness influences the slurry wear resistance of the thermal sprayed materials. Cavitation erosion tests were carried out on above-mentioned materials and on HP/HVOF thermal-sprayed coatings with different compositions. The cavitation erosion resistance is not affected by material hardness, but is influenced by the density of pores in the material.
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