Method for manufacturing products by plastic deformation at high temperatures

摘要

In a process to manufacture a pressed sheet steel component, the sheet steel blank is first pre-heated to between 450 and 700C and pressed into the required shape. The hot, pressed sheet steel component is then allowed to cool, uncontrolled, to room temperature. The temperature at which the sheet metal blank is pressed, and the grade of sheet steel, are chosen to result in a product with the desired mechanical properties. The hot- or cold-rolled sheet steel component is heated first to above the press temperature and is then allowed to cool to the press process temperature (650C), at which it remains undisturbed for a while prior to press operation. The mechanical properties remain unaffected by the press stage. The cooling stage takes place in a draught-free zone.