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Relation between formability and precipitates in Ti‐IF enamelling steels
Author(s) -
Cauter An Van,
Hörzenberger Franz,
De Cooman Bruno C.
Publication year - 1999
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199905664
Subject(s) - formability , deep drawing , metallurgy , materials science , precipitation , texture (cosmology) , physics , artificial intelligence , meteorology , computer science , image (mathematics)
The influence of steel composition and processing conditions on the nature of precipitates in Ti interstitial free (IF) steels for enamelling were investigated in detail. Steels designed for enamelling applications require a higher amount of precipitates than conventional deep drawing IF steels, e.g. for automotive applications. Formable IF grades for enamelling applications have high Ti, S and C contents and the properties have hitherto not been investigated in detail. This work focused on the correlation between precipitate nature, texture development and deep drawability. It was found that a low reheating temperature, a high coiling temperature and a C/S ratio in the range of 0.4–0.5, favoured the beneficial precipitation of Ti 4 C 2 S 2 . Furthermore, it is shown that for a steel with a given C/S ratio, a high Ti 4 C 2 S 2 /Ti 4 S 5 ‐ratio resulted in improved deep drawability. The deep drawability decreases with increasing C/S ratio. This is due to the decrease in γ‐fibre intensity, caused by an increased amount of TiC‐precipitates.