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AssigneeThyssenKrupp Steel Europe AG
InventorsFranz-Josef Lenze, Sascha Sikora
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A forming tool and a method for the press-hardening and tempered forming of a blank from high and/or very high strength steels are provided, in which the blank is heated before the tempered forming and then formed hot or semi-hot in a forming tool, wherein the forming tool has means for tempering. This is achieved in that the forming tool makes precisely defined temperature guidance of the blank during forming, and in that a plurality of controllable means are provided in the forming tool for tempering the forming tool, by which a plurality of temperature zones can be tempered in the forming tool, wherein at least contact surfaces of forming tool elements used for the tempered forming are allocated to individual temperature zones.
Method for adjusting a microstructure of a blank from high and/or very high strength steel during press-hardening and tempered forming of the blank, in which the blank is heated at least to an austenitizing temperature before the tempered forming and then hot-formed in a forming tool having means for tempering, wherein the blank is formed by contact surfaces of forming tool elements provided in the forming tool for the tempered forming, wherein the contact surfaces are at least partially allocated to a plurality of temperature zones provided in the forming tool and each of the plurality of temperature zones of the forming tool is tempered during the tempered forming to pre-defined temperature values and wherein a temperature of at least one of the plurality of temperature zones in the forming tool is greater than 200° C.
Dependencies are inferred from the claim text.