Publications Office of the EU
New advanced high strength steels by the quenching and partitioning (Q&P) process (NEWQP)
DisplayCustomHeader
MyPortal
български
BasketSummary
Показване на уеб съдържанието
Publication Detail Actions Portlet

Помощни инструменти

Publication Detail Actions Portlet
 Рейтинг на потребителите
custom-survey-notification
Publication Detail Portlet

Publication detail

Home

New advanced high strength steels by the quenching and partitioning (Q&P) process (NEWQP)

Final report

Метаданни за публикацията

The following materials and Q&P treatments were selected: CSM 2 (0.15C-3Mn-1.5Si), OCAS1 (0.25C-3Mn-1.5Si) and TKSE3 (0.28C-2.5Mn-2Si) with the corresponding Q&P cycles QT: 335ºC, PT:350ºC and Pt:100s, QT:224ºC, PT:400ºC and Pt:500s and QT: 240ºC, PT:450ºC without isothermal holding at the PT. The microstructural evolutions during partitioning revealed that more austenite was stabilized at higher PT and longer Pt and that more FM was present at higher QT. This is in the case of ideal partitioning without competing reactions. The mechanical properties, in terms of YS, UTS and TE, were ranging between 800 to 1150 MPa, 1100 to 1850 MPa and 8 to 15%, respectively. The formability and fracture analysis revealed a strong influence on the microstructure of the steels. The fatigue analysis showed that the QP steels have less fatigue sensitivity than commercial steels with similar mechanical strength. The phase model modelling (PFM) of the microstructure development was carried out. The C partitioning between the carbon supersaturated ferrite and the austenite at the QT for different partitioning condition was evaluated. Modelling of the polycrystalline microstructure of austenitic and martensitic phases by integrating Phase Field and Ginzburg-Landau approaches was carried out. The pilot-plant production parameters were evaluated and compared to process-windows in industrial production. The welding and galvanizing were successful, after some parameter optimization. The FEM simulations revealed failure in some components. The spring back behaviour was studied with the bumper geometry. Finally, the LCA showed that energy required to produce these new QP steels is comparable to that of commercially available steels.
Показване на повече
Показване на по-малко
ISSN 1831-9424
ISBN 978-92-79-53368-6
DOI 10.2777/104771
Каталожен номер KI-NA-27552-EN-N
ISSN 1018-5593
ISBN 978-92-79-53367-9
DOI 10.2777/951031
Каталожен номер KI-NA-27552-EN-C
PDF
ISSN 1831-9424 ISBN 978-92-79-53368-6 DOI 10.2777/104771 Каталожен номер KI-NA-27552-EN-N
Печатна версия
ISSN 1018-5593 ISBN 978-92-79-53367-9 DOI 10.2777/951031 Каталожен номер KI-NA-27552-EN-C
  • Released on EU publications website:
Тази публикация е достъпна за изтегляне в уеб формат (PDF) и във формат с качество за печат (PDF/X). За повече информация за това как да разпечатате вашето собствено копие на публикациите на ЕС, моля, вижте нашия раздел „Често задавани въпроси“.
Publication Viewer

Визуализатор

Pop up window annotations