Community Research and Development Information Service - CORDIS


The present project concerns the possible production of electrical steels (silicon iron alloys) starting from thin bands directly obtained by rapid solidification of the melt.

Casting trials have been performed at the pre-industrial scale, using the strip casting pilot plant of Terni (Acciai speciali Terni) with various alloys within the range between 1.0 and 3.2% of silicon content, to cover typical commercial product grades.

The most evident effect of the rapid solidification of the silicon iron alloys cast directly as a strip is their brittleness, mainly related to the occurrence of large average grain size in the as cast strip and which is proportional to the silicon content. In the case of high silicon content (3%), such brittleness severely compromises the strip workability necessary to face efficiently industrial process steps as continuous annealing and cold rolling. In cases of silicon content lower than 2%, a final product processed on industrial lines with good magnetic and mechanical properties has been obtained by just adopting a few precautions.

Laboratory experiments and microstructure investigations have proved that the internal quality and structure obtained by strip casting of such alloys are adequate to produce electrical steels.

In particular, in the case of the GO grades, it has been shown that there is the possibility to regulate the complex equilibrium of grain structure, texture and inclusions distribution necessary to control the oriented secondary re-crystallization which characterizes these materials. The trials performed have suffered from certain heterogeneity of the microstructure. ucture.

Additional information

Bibliographic Reference: EUR 19981 EN (2001), pp. 76. Euro: 11.50
Availability: Available from EUR-OP sales agent URL:
ISBN: ISBN 92-894-1579-7
Record Number: 200114107 / Last updated on: 2001-11-28
Original language: en
Available languages: en