METHOD USING LASER FOR WELDING BETWEEN TWO METALLIC MATERIALS OR FOR SINTERING OF POWDERS, AND USE FOR MAKING BIPOLAR PLATES FOR PEM FUEL CELLS

摘要

To provide methods for facilitating welding that needs to be done following complex paths and avoiding oxidation of weld lines.SOLUTION: A method for welding between two metallic materials 2, 3 or for sintering of one or more powders comprises the following steps: a. fitting a solid plate 10, transparent at one or more emission wavelengths of a laser beam F, between a laser L and one or more contact zones 4 between the metallic materials to be welded or one or more sintering zones of the one or more powders; and b. emitting the laser beam, through the transparent plate, to perform welding of the materials in the one or more contact zones or sintering of the one or more powders in the one or more sintering zones.SELECTED DRAWING: Figure 3