THE INFLUENCE OF NIOBIUM ON THE RESULTING STRUCTURE OF TRIP STEELS DURING THE CONTINUOUS COOLING

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F18%3A43953020" target="_blank" >RIV/49777513:23210/18:43953020 - isvavai.cz</a>
Result on the web
<a href="https://www.metalconference.eu/cz/sbornik-metal-2018/" target="_blank" >https://www.metalconference.eu/cz/sbornik-metal-2018/</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
THE INFLUENCE OF NIOBIUM ON THE RESULTING STRUCTURE OF TRIP STEELS DURING THE CONTINUOUS COOLING
Original language description
High strength multiphase TRIP steels are very often used as structural materials, especially in the automotive industry. Due to their ability to absorb energy during the impact, they are used for safety components of the car body. These parts can be produced by a hot stamping process, which has the advantage of using lower forming forces and a smaller spring back effect. The problem during heat treatment of TRIP steels is the holding time in the region of bainitic transformation, which facilitates bainite formation and stabilization of retained austenite. In the present study, two low-alloy TRIP steels with and without niobium were chosen. Physical simulation was employed to test an alternative route without an isothermal hold during cooling after hot stamping. Several continuous cooling profiles from the tool temperature were applied. The results were compared with isothermal processing in the region of bainitic transformation. Mixed structures consisting of bainite, martensite, ferrite and retained austenite were obtained for both steels. The ultimate strength reached more than 900 MPa with the elongation A20mm over 15 %.
Czech name
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Czech description
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Project
<a href="/en/project/TG02010011" target="_blank" >TG02010011: Promoting commercial opportunities of UWB</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Conference Proceedings - METAL 2018 - 27th International Conference on Metallurgy and Materials
ISBN
978-80-87294-84-0
ISSN
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e-ISSN
neuvedeno
Number of pages
6
Pages from-to
712-717
Publisher name
TANGER Ltd., Keltickova 62, 710 00 Ostrava, Czech Republic, EU
Place of publication
Ostrava
Event location
Brno, Czech Republic
Event date
May 23, 2018
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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