Method for producing a component by reshaping a plate, and device for carrying out said method
AssigneeAudi AG
InventorGerhard Schiessl
Life of this patent
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Abstract
The invention relates to a method for producing a component by reshaping a coated plate consisting of tempering steel, said plate being austenitized before the reshaping by means of a first heat treatment, followed by the growth of the layer thickness. The aim of the invention is to optimize the process and to prevent the production of scrap plates caused by interruptions to the process. To this end, after being rapidly cooled, the heat-treated plate is temporarily stored, and is briefly heated again to the austenitization temperature, directly before being reshaped to form the component. Once the structure has been modified, the plate is reshaped and hardened. Preferably, the plate is heated a second time by induction.
Claims25
A method for producing a component by reshaping a coated plate of quenched and tempered steel, before reshaping in a first process step, the plate being supplied to a first furnace and being austenitized there and a residence time of the plate in the first furnace being chosen such that in addition to the structure transformation an increase in the layer thickness takes place, the method comprising:
- rapid cooling and subsequent intermediate storage of a heat treated sheet bar,
- repeated, brief heating of the sheet bar in a second furnace to an austenitization temperature directly prior to forming into the component, and
- forming and hardening the sheet bar after completed structure transformation.
A method of producing a component comprising:
- providing a coated sheet of quenched and tempered steel;
- shaping the sheet;
- heat treating the shaped sheet to perform a first austenitization of the sheet, during which a structure transformation occurs increasing the layer thickness thereof;
- cooling and quenching the heat treated sheet;
- storing the cooled and quenched sheet;
- performing a second heat treatment to perform a second austenitization of the sheet;
- and
- forming the sheet into the component.
Dependencies are inferred from the claim text.