CONTINUOUS SURFACE-TREATMENT WITH A PULSE D ND-YAG LASER

This work presents the results of investigations in case of laser clad ding with a pulsed Nd:YAG laser. We discuss about the experimental par ameters in view to realize single clad and particulary the laser data (energy, frequency, pulse duration). The main results are the clad for mation beyond an energy threshold and beyond a threshold pulse duratio n, the clad behaviour is the same as a clad obtained with a cw laser. Thanks to a cross-section modeling, we compare calculations with exper iments and we conclude that the interaction efficiency depends widely on powder spray characteristics.