Method of descaling metal products
AssigneeAcieries Reunies de Burbach-Eich-Dudelange S.A. ARBED
InventorsAlfred Funck, Jo Simon
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Abstract
Metallic sheets, wires, bars or other products are descaled by sweeping their surfaces with one or more laser beams to detach an adhering oxide film along lines traced by the beam sweep. The film fragments, still loosely adhering at locations between the sweep lines, are then removed mechanically, chemically or electrolytically.
Claims6
A method of descaling metallic workpieces having surfaces coated with an oxide film, comprising the steps of subjecting the oxide film of a workpiece to be descaled to sudden localized heating by continuously displacing at least one laser beam in a multiplicity of closely spaced but discrete passes across the coated surface, thereby detaching the film from the subjacent metallic substrate along the path of the beam sweep and substantially loosening the film between said discrete passes, and thereafter subjecting said coated surface in its entirety to an oxide-removing aftertreatment.
Dependencies are inferred from the claim text.