Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Combination of international high pressure forming and Q-P process for production of hollow products from Ahs steel

Kombination von Innenhochdruckumformen und Q-P Prozess für die Herstellung von Hohlteilen aus AHS Stahl
: Masek, Bohuslav; Vorel, Ivan; Jirkova, Hana; Kurka, Petr


Džugan, J.:
COMAT 2014 - recent trends in structural materials : Selected, peer reviewed papers from the 3rd International Conference COMAT on Recent Trends in Structural Materials, November 19-21, 2014, Pilsen, Czech Republic
Durnten-Zurich: TTP, 2015 (Advanced materials research 1127)
ISBN: 978-3-03835-623-3
ISBN: 978-3-0357-0102-9
International Conference on Recent Trends in Structural Materials (COMAT) <3, 2014, Pilsen>
Conference Paper
Fraunhofer IWU ()
Q-P process; hot stamping; internal high pressure forming

All sectors of industry experience high demand for shaped products with as good mechanical properties as possible at low costs. Automotive industry, in addition, requires that the parts are of lightweight construction. Consequently, new types of materials and processes have to be combined to design new production chains capable to meet this demand. For instance, there are high-strength low-alloyed steels, whose final properties are attained by advanced heat treating techniques. One of such techniques is the Q&P process which can deliver excellent ultimate strengths exceeding 2000 MPa at a sufficient elongation level of 10 %. When combined with an unconventional forming method, it allows complex-shaped parts with outstanding mechanical properties to be made. One example of such combined procedure is the sequence of internal high pressure forming, hot stamping and Q&P processing. In the present study, thin-walled hollow stock was processed using such a combined procedure. After stepwise optimization of processing parameters, products with martensitic structure and a small amount of bainite were obtained. In all locations of the product which were tested, the ultimate strength exceeded 1950 MPa and elongation reached 15 %.