Arc spraying process parameters - working current

       The power supply used for arc spraying should have flat characteristics or slightly rising external characteristics. During the spraying process, the arc voltage remains unchanged, and the working current increases with the increase of wire feeding speed.



If the spray current is too small or too large, it is not conducive to the improvement of coating performance. If the spray current is too small, the arc cannot burn stably, the wire is not fully melted, and coarse spray particles are easily formed. Poor, it affects the compactness of the coating, affects the magic particle wear resistance of the coating for the wear-resistant coating, and affects the anti-corrosion effect of the coating for the anti-corrosion coating. Increasing the working current during spraying can improve production efficiency on the one hand and coating quality on the other hand. However, the increase of the working current also brings side effects, that is, the material burning loss increases and the deposition rate decreases.