EP 2239350 A2 20101013 - THERMALLY TREATED SHEET METAL MOULDED PARTS FROM SHEET METAL MATERIAL WITH AN ANTI-CORROSION COATING
Title (en)
THERMALLY TREATED SHEET METAL MOULDED PARTS FROM SHEET METAL MATERIAL WITH AN ANTI-CORROSION COATING
Title (de)
WÄRMEBEHANDELTE BLECHFORMTEILE AUS EINEM STAHLBLECHMATERIAL MIT EINER KORROSIONSSCHUTZBESCHICHTUNG
Title (fr)
PIÈCES DE FORMAGE EN TÔLE TRAITÉES À CHAUD À PARTIR D'UN MATÉRIAU EN TÔLE D'ACIER ET DOTÉES D'UN REVÊTEMENT ANTICORROSION
Publication
Application
Priority
DE 102009016852 A 20090408
Abstract (en)
The method comprises deforming a printed circuit board made of a heat-treatable steel sheet metal material (1) to a sheet metal molded part, where the printed circuit board has a corrosion-protective coating (12) applied on one side, and carrying out a heat treatment on the sheet metal molded part for changing the material properties of the steel sheet metal material. An oxide layer (13) forms on the corrosion-protective coating in an area-wise manner and defines itself during the heat treatment. The process is carried out, so that sufficient layer quality of the oxide layer is achieved. The method comprises deforming a printed circuit board made of a heat-treatable steel sheet metal material (1) to a sheet metal molded part, where the printed circuit board has a corrosion-protective coating (12) applied on one side, and carrying out a heat treatment on the sheet metal molded part for changing the material properties of the steel sheet metal material. An oxide layer (13) forms on the corrosion-protective coating in an area-wise manner and defines itself during the heat treatment. The process is carried out in such a way that a sufficient layer quality of the oxide layer is achieved with respect to subsequent coating and/or joining of the sheet metal molded part, so that the oxide layer remains onto the sheet metal molded part. The heat treatment step is a press hardening process. The sufficient layer quality of the oxide layer is achieved by selecting the steel sheet metal material, by selecting a deformation process and/or accompanying deformation-technical measures and by adjusting the process variables of the heat treatment, where the process variable is insertion temperature, furnace temperature, processing time, removal temperature, cooling time, pressing pressure and/or tool temperature. A further step such as chemical treatment, oiling, further heat treatment and/or removal of the sheet metal molded part follows the heat treatment step to achieve the sufficient layer quality of the oxide layer. The layer quality of the oxide layer is quantified based on a parameter, which gives the information about the layer quality of the oxide layer if the sheet metal molded part is subsequently coatable and/or joinable. The parameter is an electrical resistance value, conductive value, heat-conductive value, layer-thickness value of the oxide layer, roughness value of the oxide layer, adhesion value of the oxide layer, hardness value of the oxide layer, color value of the oxide layer and/or spectral value. One of the process steps is carried out and is optionally adapted, so that the parameter of the produced sheet metal molded part or the sheet metal molded part to be produced is present within a defined range to ensure that a defined mechanical material property of the sheet metal molded part is present within a defined range. The individual steps are defaultly carried out to obtain the sheet metal molded part with the sufficient layer quality of the oxide layer. The execution of one step is adapted during the process flow to obtain the sheet metal molded part with the sufficient layer quality of the oxide layer. The steps of the process flow are repeatedly carried out to produce the sheet metal molded parts, where the layer quality of the oxide layer of the produced sheet metal molded parts is determined and is optionally adapted based on the execution of one step of the process flow to obtain the sheet metal molded part with the sufficient layer quality. The produced sheet metal molded part is classified based on the layer quality of its oxide layer to release the sheet metal molded part for subsequent coating and/or joining and to bring post-processing or other use purpose. An independent claim is included for a sheet metal molded part.
Abstract (de)
Die Erfindung betrifft ein Verfahren zur Herstellung wärmebehandelter Blechformteile aus einem Stahlblechmaterial (1) mit einer Korrosionsschutzbeschichtung (12), insbesondere einer im Wesentlichen metallischen Korrosionsschutzbeschichtung, umfassend die Schritte: - Bereitstellen einer Platine aus einem wärmebehandelbaren Stahlblechmaterial (1), mit der wenigstens einseitig aufgebrachten Korrosionsschutzbeschichtung (12); - Umformen dieser Platine zu einem Blechformteil; - Ausführen einer Wärmebehandlung am Blechformteil, zur Veränderung der Werkstoffeigenschaften des Stahlblechmaterials (1), wobei sich während der Wärmebehandlung definiert und zumindest bereichsweise eine Schutzschicht (13), insbesondere eine Oxidschicht, auf der Korrosionsschutzbeschichtung (12) ausbildet. Erfindungsgemäß ist vorgesehen, dass das Verfahren derart ausgeführt wird, dass eine ausreichende Schichtqualität der Schutzschicht (13) im Hinblick auf ein nachfolgendes Beschichten und/oder Fügen des Blechformteils erzielt wird, so dass die Schutzschicht (13) auf dem Blechformteil verbleiben kann. Die Erfindung betrifft ferner ein Blechformteil aus einem Stahlblechmaterial (1) mit einer wenigstens einseitig aufgebrachten Korrosionsschutzbeschichtung (12).
IPC 8 full level
C23C 2/26 (2006.01); C23C 2/28 (2006.01); C23C 8/02 (2006.01)
CPC (source: EP US)
C23C 2/26 (2013.01 - EP US); C23C 2/28 (2013.01 - EP US); C23C 2/29 (2022.08 - EP US); C23C 8/02 (2013.01 - EP)
Citation (applicant)
- DE 202004021264 U1 20070531 - VOESTALPINE STAHL GMBH [AT]
- DE 102007022174 B3 20080918 - VOESTALPINE STAHL GMBH [AT]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA ME RS
DOCDB simple family (publication)
EP 2239350 A2 20101013; EP 2239350 A3 20110629; EP 2239350 B1 20191016; DE 102009016852 A1 20101014
DOCDB simple family (application)
EP 10003492 A 20100330; DE 102009016852 A 20090408