Title: Effect of Processing Parameters on Adhesion Strength of Arc Sprayed NiAl Coating
Abstract: Ni-based coating were prepared by Ni-Al wire and arc spraying system(Model PARXAIR-9935). The arc spraying process was optimized by orthogonal experiment design with using adhesive strength level as the criterion.Online testing equipment was used to detect the flame flow strength,Particle velocity and temperature.Morphology of the sprayed layer and the fracture of the coating were investigated by means of metallographic microscope,scanning electron microscopy( SEM) and energy dispersive spectrometry( EDS).The results show that the spraying distance, atomizing air pressure, arc current, arc voltage have different effect on the adhesive strength of NiAl coating.The optimized process parameters of the arc spraying NiAl coating were spray current 150 A, spray voltage 27 V, atomizing air pressure 0.6MPa and spray distance 150 mm.The coating displays the typical layer structure characteristic with good compactness using the optimized parameters.With the increase in the thickness of the coating,the bonding strength decreases linearly. The highest adhesive strength of theNiAl coating with 39.8MPa can be obtained using the optimized parameters.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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Cited By Count: 1
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