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In steel processing, and for most of the steel grades, the precipitation control is of utmost importance, since the development of final properties is greatly influenced by the evolution of the precipitation during processing. To develop good deep drawing properties, all C and N must be precipitated before cold rolling and annealing. Interstitial C and N are detrimental for the formation of the favourable {111}-fibre during continuous annealing. By consequence, the precipitation characteristics such as composition, distribution and size and their evolution during processing from cast slab to hot rolled coil must be controlled. In this project, the work is focused on the development of deep drawing qualities where all carbon has precipitated during reheating and the hot rolling sequence. The project studies two different steel grades. IF- Ti steel grades: the precipitation of C and S with Ti is studied (TiC, TixS, Ti4C2S2, etc.). The accent was made on Ti-carbosulphide precipitation in function of the chemical composition, the cast state, the reheating temperature and the hot rolling parameters (T, Epsilon). ELC- Ti steel grades: the precipitation of Ti is studied. The influence of the reheating cycle and hot rolling parameters (T, Epsilon, coiling temperature and cooling rate) in function of the chemical composition was looked at for the precipitation of C.

Additional information

Authors: HERMAN J C, CRM, Zwijnaarde (BE);CREYNS A, CRM, Zwijnaarde (BE);SCOTT C, Arcelor Research (IRSID), Maizières-lès-Metz (FR);PICHLER A, voestalpine Stahl, Linz (AT);SOENEN B, OCAS, Zelzate (BE)
Bibliographic Reference: EUR 21437 EN (2005), 206 pp. Euro: 35
Availability: (Catalogue Number: KI-NA-21437-EN-S)
ISBN: ISBN 92-79-00059-4
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