LASER CUTTING OF A PRE-COATED STEEL BLANK AND ASSOCIATED BLANK

• Main Authors: LUQUET, Bernard, BERNARDI, Quentin
• Format: Patent
• Language: English; French; German
• Published: 26.10.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

Method for producing a precoated steel blank including the successive steps of: -providing a precoated steel strip including a steel substrate having, on at least one of its main faces, a precoating, the precoating including an intermetallic alloy layer and a metallic layer extending atop said intermetallic alloy layer, the metallic layer being a layer of aluminum, a layer of aluminum alloy or a layer of aluminum-based alloy, -laser cutting the precoated steel strip in order to obtain at least one precoated steel blank, the precoated steel blank including a laser cut edge surface resulting from the laser cutting operation, the laser cut edge surface including a substrate portion and a precoating portion, wherein the laser cutting is carried out in such a way that the substrate portion of the laser cut edge directly resulting from the cutting operation has an oxygen content greater than or equal to 15% in weight.