Functional component, such as diaphragm seal with a metal foil of or special materials, a method for welding a metal film made of or special materials, as well as laser beam welding device for this purpose,

摘要

Functional component for metrological applications to corrosive media, with a metallic base body (8) and a metal foil made of metallic corrosion-resistant or special materials, wherein the metal foil on a joint surface (13) of the base body (8) is welded, characterized in that the metal foil of or special materials by means of a fiber laser (2) with a continuously advanced laser beam (18) according to predetermined welding parameters, is welded in such a way that the alloy of a weld seam (27) in the region of contact between the base body (8) and the metal foil consists of a local mixing structure zone (26), in which the molten materials of the base body (8) and the metal foil mixing, and the alloy in the region of a with respect to the base body (8) outwardly lying surface (28) of the metal foil or special materials, no components of the material of the base body (8) contains.