DISTRIBUTION OF POWDER PARTICLES ON THE SURFACE OF SUBSTRATE IN LASER-SURFACE APPLICATION

In laser surface application, one of the routes is to spurt the gas-carrying the metal or ceramic powder from the laser outlet after being melted to the coating layer on the surface of the substrate. The distribution of spurted powder particles have a great influence on the quality of laser application. This paper discusses theoretically the movement of the carried powder material after being spurted from the outlet and the distribution form of the powder coating on the surface of the substrate achieved near spraying nozzle. This corresponds to the results of the experiment. This is of great theoric significance to the improvement of the laser surface application and also provides references to the improvement of the distribution form of powder coating in experimentation.