Title: Physical Simulation of Press Hardening of TRIP Steel
Other Titles: Modelové zpracování TRIP oceli pomocí technologie presshardening
Authors: Jirková, Hana
Opatová, Kateřina
Wagner, Martin F.-X.
Mašek, Bohuslav
Citation: JIRKOVÁ, H., OPATOVÁ, K., WAGNER, M.F., MAŠEK, B. Physical Simulation of Press Hardening of TRIP Steel. In: Proceedings of the International Conference on Martensitic Transformations: Chicago. Cham: Springer, 2018. s. 135-141. ISBN 978-3-319-76967-7 , ISSN 2367-1181.
Issue Date: 2018
Publisher: Springer
Document type: konferenční příspěvek
URI: http://hdl.handle.net/11025/31255
ISBN: 978-3-319-76967-7
ISSN: 2367-1181
Keywords in different language: press hardening;TRIP steel;retained austenite;two step etching;EBSD
Abstract in different language: Deformation-induced martensitic transformation is used for improving mechanical properties of AHS steels which contain metastable retained austenite. TRIP steels are one of the categories that fall into this group. Their microstructures consist of proeutectoid ferrite, bainite, and metastable retained austenite. Cold working causes retained austenite in these steels to transform to deformation-induced martensite. A technical complication to their treatment routes is the isothermal holding stage. At this stage, bainite forms and retained austenite becomes stabilized which is the key aspect of the process. A CMnSi-type low-alloy steel with 0.2 % carbon was subjected to various experimental cooling sequences which represented press hardening operations at tool temperatures ranging from 500 °C to the room temperature, followed by isothermal holding in the bainitic transformation region. By varying the cooling parameters, one can obtain a broad range of mixed martensitic-bainitic structures containing retained austenite, with strengths in the vicinity of 1300 MPa, and A20 elongation levels of 10 %.
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům.
© Springer
Appears in Collections:Konferenční příspěvky / Conference Papers (RTI)

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