Community Research and Development Information Service - CORDIS


Deep-decarburized, microalloyed IF steel has proved successful as special deep drawing material and is used on a large scale. Drawbacks presented by IF steel are the high temperatures needed for final rolling on the hot strip mill as well as for batch annealing. Because of the relatively high microalloying, other difficulties include surface problems, immediate work hardening during skin pass rolling and the risk of deformation-induced brittleness. In addition, the range of mechanical properties of IF steel is still very limited at present. The purpose of this study was to remedy these drawbacks by developing new steels with minimum C contents and a very low maximum stoichiometric alloying characteristic. In addition, the potential use of alloying techniques to increase the strength of IF steel grades beyond the level already attained today was investigated. In all, 22 laboratory steels and 6 industrial steels were produced. The following characteristics of the steel were determined in detail:

- Structure, precipitation state and texture;
- Properties relevant to manufacturing (conversion and recrystallization characteristics, skin pass rolling characteristic, ageing, suitability for hot-dip galvanizing);
- Processing characteristics (mechanical properties, bake hardening, work hardening characteristic, technological test techniques).

Additional information

Authors: BLECK W, Thyssen Stahl AG, Duisburg (DE);IMLAU K, Thyssen Stahl AG, Duisburg (DE)
Bibliographic Reference: EUR 16721 DE (1997) 114pp., FS, ECU 20.00
Availability: Available from the (2)
ISBN: ISBN 92-828-1017-8
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