Corus Staal Bv

Andr&eacute; Bodin

Thomas M Hoogendoorn

A process and device for producing a high-strength steel strip. In the process, liquid steel is cast in at least one continuous-casting machine ( ) with one or more strands to form a slab and, utilizing the casting heat, is conveyed through a furnace device ( ). The slab undergoes preliminary rolling in a preliminary rolling device ( ) and, in a final rolling device ( ), is finishing-rolled to form a steel strip with the desired final thickness. In a continuous, endless or semi-endless process, the slab undergoes preliminary rolling in, essentially, the austenitic range in the preliminary rolling device ( ) and, in the final rolling device ( ), is rolled in the austenitic range or, in at lest one stand of the final rolling device ( ), is rolled in the two-phase austenitic-ferritic range, the austenitic or austenitic, ferritic rolled strip. After leaving the final rolling device ( ), the strip is cooled rapidly to obtain the desired structure.

Process and device for producing a high-strength steel strip

A process for producing a ferritically rolled steel strip, in which liquid steel is cast in a continuous-casting machine ( ) to form a slab and, utilizing the casting heat, is conveyed through a furnace device ( ) undergoes preliminary rolling in a preliminary rolling device ( ) and, in a final rolling device ( ), is finishing-rolled to form the ferritic steel strip with a desired final thickness, in which process, in a completely continuous, an endless or a semi-endless process, the slab is rolled in the austenitic range in the preliminary rolling device ( ) and, after rolling in the austenitic range, is cooled to a temperature at which the steel has a substantially ferritic structure, and the strip is rolled, in the final rolling device, at speeds which substantially correspond to the speed at which it enters the final rolling device ( ) and the following thickness reduction stages, and in at least one stand of the final rolling device ( ), the strip is ferritically rolled at a temperature of between 850&deg; C. and 600&deg; C., and after leaving the final rolling device ( ), is cooled rapidly to a temperature below 500&deg; C. in order substantially to avoid recrystallization.

Growing community of inventors

Santpoort-Noord, Netherlands

André Bodin

Growing community of inventors

Santpoort-Noord, Netherlands

Andr&eacute; Bodin

André Bodin