Usinor

Sollac

Catherine Juckum

Michel Faral

Jean-Pierre Birat

Nicolas Guelton

Michel Babbit

Michel Guttmann

H&eacute;l&egrave;ne Regle

Jean-Hubert Schmitt

Helene Regle

The invention relates to a method for producing a siderurgical product made of carbon steel having a high copper content, according to which: &#x2014;a liquid steel having the composition: 0.0005%&#x2266;1%; 0.5&#x2266;Cu&#x2266;10%; 0&#x2266;Mn&#x2266;2%; 0&#x2266;Si&#x2266;5% 0&#x2266;Ti&#x2266;0.5%; 0&#x2266;Nb&#x2266;0.5%; 0&#x2266;Ni&#x2266;5%; 0&#x2266;Al&#x2266;2%, the remainder being iron and impurities, is produced;&#x2014;said liquid steel is poured directly in the form of a thin strip having a thickness of no more than 10 mm;&#x2014;the strip is subjected to forced cooling and/or is surrounded by a non-oxidizing atmosphere while having a temperature of more than 1000? C.; &#x2014;said thin strip is hot rolled at a reduction rate of at least 10%, the temperature at the end of the rolling process being such that all of the copper is still in a solid solution in the ferrite and/or austenite matrix;&#x2014;and the strip is coiled. The invention also relates to a siderurgical product obtained according to said method.

Method for the production of a siderurgical product made of carbon steel with a high copper content

The invention relates to the iron and steel industry. More specifically, the invention describes the manufacture of steel strip intended to be converted into thin packaging, such as for drinks and preserved food.

Method for making carbon steel bands, in particular packaging steel bands, and resulting bands

The subject for the invention is a process for manufacturing strip. The process includes casting directly from liquid metal a steel strip 1.5 to 10 mm in thickness, subjecting the cast steel strip, in the austenitic phase, to a first hot rolling operation in one or more steps at a temperature of between 950&deg; C. and the Ar,temperature of said strip with an overall reduction ratio of at least 10%, then subjecting the hot rolled strip, in the ferritic phase, to a second hot rolling operation in one or more steps at a temperature below 850&deg; C., with an overall reduction ratio of at least 50% in the presence of a lubricant, so as to obtain a hot-rolled sheet with a thickness of less than or equal to 2 mm, and recrystallizing the hot rolled sheet at a temperature between 700 and 800&deg; C. The composition of the steel strip comprises (in weight %): carbon less than 0.1%, manganese from 0.03 to 2%, silicon from 0 to 0.5%, phosphorus from 0 to 0.1%, boron from 0 to 0.002%, titanium from 0 to 0.15%, balance iron and impurities.

Process for manufacturing drawable sheet by direct casting of thin strip, and sheet thus obtained

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Paris, France

Catherine Juckum