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AssigneeSalzgitter Flachstahl GmbH
InventorsMarc Debeaux, Friedrich Luther, Thomas Koll
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An aluminum-based coating of a flat steel product is applied in a hot-dipping method and comprises a mass percentage of silicon within a given range. The coating for a flat steel product, in particular for press mold hardening components, offers a shortened required minimum oven dwell time and a sufficiently large processing window when heating in an oven. This is achieved in that the surface of the coating has a degree of absorption for thermal radiation ranging between 0.35 and 0.95 prior to an annealing treatment, where the degree of absorption relates to an oven temperature ranging from 880 to 950° C. during the austenitizing annealing treatment. The invention additionally relates to an improved method for producing a flat steel product with an aluminum-based coating, to an inexpensive method for producing press-hardened components from such flat steel products, and to a press-hardened component made of such flat steel products.
An aluminum-based coating of a flat steel product, wherein the coating comprises an aluminum-based coat applied by hot-dipping and has 1.8 to 15 mass percent silicon, advantageously 5 to 13 mass percent silicon, even more advantageously 8 to 11 mass percent silicon and wherein the flat steel product coated in this manner is subjected to annealing treatment in an austenitizing manner in a furnace, wherein the surface of the coating has a degree of absorption for thermal radiation between 0.35 and 0.95 prior to the annealing treatment, and wherein the degree of absorption is related to a furnace temperature in the range of 880 to 950° C. during the austenitizing annealing treatment.
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A method for producing a flat steel product comprising an aluminum-based coating having 1.8 to 15 mass percent silicon, advantageously 5 to 13 mass percent silicon, even more advantageously 8 to 11 mass percent silicon, comprising:
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Dependencies are inferred from the claim text.