Sollac

Veronique Sardoy

Bernard Debiesme

Jacques Ouvrard

Gilles Dahmen

Pascal Choquet

Isabelle Poissonnet

Anne Blanchard

Jean Claude Jouvenel

A killed and vacuum-degassed very-low-carbon steel containing, by weight, between 0.10 and 0.35% manganese, less than 0.006% nitrogen, less than 0.025% phosphorus, less than 0.020% sulphur, less than 0.020% silicon, at most 0.08% of at least one of the elements copper, nickel and chromium, as well as aluminum. The steel is cast in the form of a slab, the slab is hot rolled in order to obtain a hot-rolled sheet, the hot-rolled sheet is coiled, the hot-rolled sheet is cold rolled in two rolling operations separated by a continuous annealing operation. The steel contains at most 0.006% carbon by weight and 0.010% aluminum and the hot-rolled sheet is coiled at a temperature below 620&deg; C. Preferably, the steel is killed by mixing with a slag containing adjusted amounts of aluminum and of alumina.

Process for producing a thin sheet of ultra-low-carbon steel for the manufacture of drawn products for packaging and thin sheet obtained

A process for producing a strip of steel sheet, for the production of metal packaging, comprising forming a hot-rolled strip of steel having the following composition by weight: carbon up to 0.08%, silicon .ltoreq.0.020%, manganese between 0.05% and 0.60%, sulphur .ltoreq.0.020%, phosphorus .ltoreq.0.020%, nitrogen up to 0.016%, aluminum up to 0.060%, copper .ltoreq.0.06%, nickel .ltoreq.0.040%, and, optionally, chromium and boron, the balance consisting of iron and inevitable impurities, then carrying out a first cold-rolling operation on the hot-rolled strip in order to obtain a blank, subjecting the blank to a continuous recrystallization annealing operation, carrying out a second cold-rolling operation on the blank in at least two passes in order to obtain the sheet with its final thickness, wherein between the two passes of the second cold rolling, the strip of sheet is subjected to an ageing operation at a temperature of at most 300.degree. C. for a time which can range from a few minutes to several days.

Process for manufacturing a strip of steel sheet for the production of

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Metz, France

Veronique Sardoy