Affiliation:
1. College of Mechanical and Electrical Engineering, Hebei University of Engineering, Handan, China
Abstract
The erosion behavior of three WC-Co-Cr coatings obtained by high velocity oxy-fuel/air-fuel (HVOF/HVAF) thermal spray systems has been investigated using Al2O3 as erodent at four impingement angles (15°, 45°, 75°, 90°) and 90 m/s impact velocity. The results indicate that the micro-cutting and coatings spallation are main erosion mechanisms for coatings, and the proportion of the two mechanisms changes depending on the impingement angle. The ranking of the coatings in terms of erosion resistance is very much dependent on the microstructure of coatings. The behavior of formation and propagation of cracks also depends on the microstructure of coatings, and has been understood in terms of schematic diagrams.
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering
Cited by
15 articles.
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