Recrystallization Behavior Immediately after Hot-Rolling in Ferrite Region in Ultra Low Carbon Sheet Steels

Abstract:

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One-pass hot rolling in the ferrite region was conducted at higher temperatures, using various rolling temperatures and rolling reductions, with two types of ULC steels, 0.016% Nb and 0.023% Ti, and recrystallization behaviors immediately after hot rolling were investigated. The γ-fiber strength reached its maximum at around 50% rolling reduction at 1273K with the Nb-added steel and 1323K with the Ti-added steel. On the other hand, in high temperature rolling of the Ti-added steel, the γ-fiber did not develop, independent of rolling reduction. These changes corresponded to the recrystallized fraction, in that the strength of the γ-fiber decreased when recrystallization occurred immediately after rolling. New recrystallized-like grains were produced in the domain where distortions were particularly concentrated. Recrystallization seemed to be the result of various mechanisms, as some recrystallized grains were formed by a bulging mechanism, whilst others were surrounded by high angle grain boundaries.

Info:

Periodical:

Materials Science Forum (Volumes 702-703)

Edited by:

Asim Tewari, Satyam Suwas, Dinesh Srivastava, Indradev Samajdar and Arunansu Haldar

Pages:

623-626

DOI:

10.4028/www.scientific.net/MSF.702-703.623

Citation:

K. Okuda and K. Seto, "Recrystallization Behavior Immediately after Hot-Rolling in Ferrite Region in Ultra Low Carbon Sheet Steels", Materials Science Forum, Vols. 702-703, pp. 623-626, 2012

Online since:

December 2011

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Price:

$35.00

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