Risse JH, Merklein M (2024)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2024
Publisher: AIST
Pages Range: 1-7
Conference Proceedings Title: Hot Sheet Metal Forming of High-Performance Steel
Event location: Nashville, Tenn., USA
ISBN: 978-0-930767-24-2
DOI: 10.33313/512/A0101
In order to reduce greenhouse gas emissions or to increase the range of electrically powered vehicles, several lightweighting strategies are applied in the manufacturing of the latest cars. The hot stamping of ultrahigh-strength steels, which is becoming an increasingly common strategy, can be used to produce lighter components with reduced sheet thickness. In particular, parts with tailored properties that are already in use for B pillars for example, increase the crashworthiness and the lightweight potential at the same time. In contrast to existing processes, tailored carburization does not require complex tooling or intricate furnace
technologies, material thickening, or welding processes to locally adjust the mechanical properties. The to-be-reinforced areas are geometrically flexible, which makes this process especially suitable for small batch series of lightweight components. At standardly 950 °C, the carburization takes up to 6 h to achieve the highest combination of strength and ductility. Thus, strategies are needed to shorten the total process time. Diffusion hardening at elevated temperatures seems promising to achieve a similar level of mechanical properties but in a significantly reduced time. So, this contribution aims to investigate the dependence of
the thermomechanical behavior on the carburization above 950 °C, forming temperature, and strain rate of a tailored carburized material. Therefore, thermal tensile tests were performed with the complex phase steel CP-W® 800 in two different carburized states as well as in the not-carburized state. In the physical simulator Gleeble 3500 GTC the specimens pass through a simulated hot stamping process and are tested at different forming temperatures with varying strain rates. In addition to the dependency analysis, the obtained flow curves can also be used to partially generate a thermo-mechanically coupled simulation. This model
is intended to replicate the hot stamping of components with customized properties induced by tailored carburization.
APA:
Risse, J.H., & Merklein, M. (2024). Investigation of the Thermomechanical Properties During Hot Stamping of a Complex Phase Steel Carburized at Elevated Temperatures. In Jens Hardell, Daniel Casellas (Eds.), Hot Sheet Metal Forming of High-Performance Steel (pp. 1-7). Nashville, Tenn., USA: AIST.
MLA:
Risse, Jan Henning, and Marion Merklein. "Investigation of the Thermomechanical Properties During Hot Stamping of a Complex Phase Steel Carburized at Elevated Temperatures." Proceedings of the 9th International Conference on Hot Sheet Metal Forming of High-Performance Steel — CHS² 2024, Nashville, Tenn., USA Ed. Jens Hardell, Daniel Casellas, AIST, 2024. 1-7.
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