Process and device for producing a steel strip with the properties of a cold-rolled product

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United States of America Patent

PATENT NO 5832985
SERIAL NO

08817784

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Abstract

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A process for producing a steel strip with properties of a cold-rolled product. The process including comprising the sequential steps of: a) producing a thin slab 30 to 100 mm thick from a steel melt by continuous casting in a continuous casting machine, and, after a cast strip emerges from a mold of the continuous casting machine, cast rolling the cast strip with a liquid core to reduce thickness of the cast strip by at least 10%; b) descaling the thin slab produced according to step a); c) hot rolling the descaled thin slab at temperatures in a range of 1150.degree. to 900.degree. C. for reducing thickness by at least 50% to produce an intermediate strip with a maximum thickness of 20 mm; d) after hot rolling, accelerated cooling of the intermediate strip to a temperature in a range of 850.degree. to 600.degree. C.; e) rolling down the cooled intermediate strip by isothermic rolling at 850.degree. to 600.degree. C. on a finishing train with at least three stands into strips with a maximum thickness of 2 mm, whereby the strip thickness is reduced by at least 25% per roll pass; and f) subsequently cooling the isothermic rolled steel strip in accelerated fashion to a temperature no greater than 100.degree. C.

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Patent Owner(s)

Patent OwnerAddress
MANNESMANN AKTIENGESELLSCHAFTNAMMESMANNUFER 2 D-4000 DUSSELDORF 1

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bleck, Wolfgang Aachen, DE 4 20
Pleschiutschnigg, Fritz-Peter Duisburg, DE 68 238
Splinter, Paul Aachen, DE 3 18
von, Hagen Ingo Krefeld, DE 22 107

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