Relation between Arc Spraying Condition and Adhesion Strength of Sprayed Coatings
Ryoichi Kawase, Masayoshi Kureishi, Setsuji Minehisa
Arc spraying condition is related to the maximum adhesion strength of sprayed coatings of aluminium and stainless steel. The suitable condition of arc spraying is obtained through arc stability test, measurement of the adhesion strength and observation of fused particle with high speed camera.
Main results of the study are summarized as follows;
(1) Three different areas on arc stability of spraying are recognized dependent on negative and positive wire feed speed, that is stable, self-regulation and unstable arc area.
(2) The maximum adhesion strength of sprayed coatings is obtained at the spraying condition of boundary between stable and self-regulation arc area.
(3) The adhesion strength increases with increasing, the size of fused particles on stainless steel arc spraying.
The fused particles are sphere of various diameater.
The fused particles are cooled within 1/8000 second after clashing on the substrate.