Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Thomas Härtling

Christoph Zeh

Julia Katzmann

Björn Erik Mai

A method for marking a wordpieces and workpiece are disclosed. In an embodiment the method includes applying an identification to a blank in places and after applying the identification to the blank, deforming the blank to form a metal body, wherein deforming the blank comprises rolling so that a thickness of the blank changes more strongly than a width of the blank when the metal body is formed, wherein the identification remains on the metal body at least until after deforming the blank and is not destroyed by deforming the blank, and wherein the identification, both to the blank and to the metal body, has at least one of a difference in reflection or a difference in remission and an albedo difference of at least 15 percentage points in at least part of at least one of a near ultraviolet spectral region, a visible spectral region or a near-infrared spectral region.

Method for marking workpieces, and workpiece

In an embodiment, a workpiece includes a hot-formed metal body and a marking, wherein the marking comprises a phosphor and/or pigments which are at least partly arranged on the metal body and which exhibit a reflection behavior and/or a reflectance behavior and/or an albedo behavior deviating from the metal body.

Method for marking workpieces and workpiece

In an embodiment, the method includes providing a blank, applying a marking to the blank in places and heating the blank with the marking to a deformation temperature. The method further includes deforming the blank to form the workpiece and cooling the workpiece, wherein deforming is a hot forming, wherein the marking remains at the workpiece at least until after deforming and cooling, and is not destroyed by deforming, and wherein the marking has a difference in the degree of reflection and/or a difference in the degree of reflectance and/or a difference in albedo of at least 15 percentage points in at least part of the near ultraviolet, visible and/or near infrared spectral range both with respect to the blank and with respect to the workpiece.

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Dresden, Germany

Thomas Härtling