Abstract
Erosion greatly reduces the service life of slurry handling equipment. Applying an erosion-resistant coating on equipment has been widely used to protect components from erosion. In this study, vanadium carbide (VC), titanium carbide (TiC), and tungsten carbide (WC) were blended with AISI 420 stainless steel (SS) powders, respectively, to fabricate metal matrix composites (MMCs) coatings on mild steel A36 by using a high power direct diode laser. The slurry erosion test was conducted at three eroding angles, 30°, 45°, and 90°, by using an abrasive waterjet to evaluate the erosion performance of the fabricated MMCs. The results showed that the resistance of 420 SS to erosion was increased at the impingement angles of 30° and 45° after adding the carbides. At 90° impingement angle, the addition of VC and TiC improved the erosion resistance of 420 SS. In contrast, the WC deteriorated the erosion resistance of 420 SS. In addition, the VC/TiC reinforced coatings had an erosion behavior of ductile material. The maximum erosion occurred at an angle of 45°. In contrast, the WC reinforced coating exhibited the erosive characteristics of brittle material, and the maximum erosion occurred at an angle of 90°. It was found that for all coatings, the VC reinforced coating exhibited the best anti-erosive performance at all impingement angles.
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