Author(s)

P.A. Vetter, J. Fontaine, T. Engel, L. Lagrange & T. Marchione

Abstract

Characterization of laser-material interaction during laser cladding process P.-A. Vetter,* J. Fontaine,* T. Engel," L. Lagrange,& T. Marchione^ f^, BID de /a rzcfozre ^7000 France ABSTRACT The interaction between a gas-powder mixture and a laser beam has been studied in the conditions of laser surface cladding. A powder is blown with an inert gas, coaxially with a laser beam, through a nozzle. A substrate, placed underneath, receives part of the laser beam and the heated powder material. A surface layer of the blown material is formed on the substrate. The paper describes the interaction between the laser beam and the gas-powder mixture. Signals that have been recorded, include : laser power transmitted by the powder stream, spatial extension of the plasma, temporal variations and spectral content of light emitted by the ionized mixture. INTRODUCTION Laser cladding is one of the numerous techniques of surface treatment [I] which allows us to modif

Keywords