In automotive engineering the weight reduction of body components or the complete body in white can only be realized by reducing material thickness in combination with the application of high- and ultrahigh-strength steel. Normally the reduction of sheet thickness at constant material properties leads to a decrease of dent-resistance stance, crash-properties, etc. By using high- and ultrahigh-strength steel this problem can be solved. The cold-forming behavior of these materials is not sufficient in order to make complicated structure body parts. With regard to this property and as to economical aspects the use of hot stamped ultrahigh-strength and coated steel will increase in the automotive industry. In a collaboration between Audi AG and ThyssenKrupp Stahl AG several coated steel materials - hot dip aluminized 22MnB5, uncoated MS-W 1200and electrogalvanized CP-W 800 - where investigated by using a tool for a roof frame. The results of hot and semi-stamping show that certain parameters have to be observed to obtain optimum component properties. Only the right combination of heating and forming conditions produce the desired strength properties. The tests have shown however that hot and semi-hot stamping offer great potential for the production of structural components.
Manufacturing a roof frame from ultrahigh-strength steel materials by hot stamping
Herstellung eines Dachrahmens aus ultrahochfestem Stahl durch Heißpressen
2004
9 Seiten, 15 Bilder, 3 Tabellen
Conference paper
English
Manufacturing method of ultrahigh-strength light-weight commercial vehicle steel wheel
European Patent Office | 2022
|