A laser assisted method and a cold spray nozzle assembly

The present invention discloses a method and a laser-assisted cold spray nozzle assembly, a nozzle side of the nozzle throat constriction, the other side of the nozzle throat section of the expansion nozzle, the nozzle constriction at the nozzle side is provided with a high pressure gas inlet and a light-transmitting window for the laser beam enters, the light transmitting window disposed offset from the axis of the nozzle, the nozzle is provided with a mirror a constriction in the nozzle, the nozzle is provided with a powder inlet side of the expansion nozzle section, the reflecting mirror B, C and the mirror mirror D, the light emission window into the laser beam from the reflecting mirror a sequentially passes through inside the nozzle, the reflector D, the mirror and the mirror B reflects light emitted from the nozzle C expansion section, the powder inlet is D and the mirror reflector B between. This aspect of the laser and the nozzle axis at an angle incident on the mirror in the nozzle beam by a mirror on the nozzle inner wall of the multiple reflections, finally irradiated on the substrate, may be gas inside the nozzle, the powder and the matrix uniform pre heat.